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iphone Programming Glossary: perProgrammatically Request Access to Contacts http://stackoverflow.com/questions/12648244/programmatically-request-access-to-contacts that my code to add a contact to iPhone's address book no longer works. I believe this is a permission related problem since Apple now requires user permission before accessing contacts fixing this.. book no longer works. I believe this is a permission related problem since Apple now requires user permission before accessing contacts fixing this issue http www.cultofmac.com 179733 19 of ios apps access.. this issue http www.cultofmac.com 179733 19 of ios apps access your address book without your permission until ios 6 report . I expected the app to automatically ask permission to access contacts like..
http://stackoverflow.com/questions/1305127/free-weather-api These are not iPhone specific but free weather APIs. Forecast.io has 1 000 free api calls per day and then it's 1 for every 10 000 requests after that. https developer.forecast.io Big list of free.. has 1 000 free api calls per day and then it's 1 for every 10 000 requests after that. https developer.forecast.io Big list of free paid http blog.programmableweb.com 2012 01 11 12 json weather apis World..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone an iPhone application and need to essentially implement something equivalent to the 'eyedropper' tool in photoshop where you can touch a point on the image and capture the RGB values for the pixel.. CGColorSpaceRelease colorSpace return nil Create the bitmap context. Pre multiplied RGBA 8 bits per component. The source image format will be converted to the format specified here by CGBitmapContextCreate... byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data..
Symbolicating iPhone App Crash Reports http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which the app crashed as per the report. Ex atos arch armv7 o 'app name.app' 'app name' 0x0003b508 This would show you the exact..
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines vertices with opacity 0. Here's an image example to explain Comparison with AA You can read a paper about this here http research.microsoft.com en us um people hoppe overdraw.pdf You could do something.. hoppe overdraw.pdf You could do something along this way Colors is a pointer to unsigned bytes 4 per color . Should alternate in opacity. glColorPointer 4 GL_UNSIGNED_BYTE 0 colors glEnableClientState.. 4 GL_UNSIGNED_BYTE 0 colors glEnableClientState GL_COLOR_ARRAY points is a pointer to floats 2 per vertex glVertexPointer 2 GL_FLOAT 0 points glEnableClientState GL_VERTEX_ARRAY glDrawArrays GL_TRIANGLE_STRIP..
http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph Without counting Spotlight and Settings icon if you don ™t want the OS to interpolate them As per the blog post New Metrics for iOS 7 App Icons . UPDATE As per Apple Guideline App icon OR Icon and Image.. ™t want the OS to interpolate them As per the blog post New Metrics for iOS 7 App Icons . UPDATE As per Apple Guideline App icon OR Icon and Image Sizes Icon dimensions iOS 7 and later Icon dimensions iOS..
How to share custom data between iPhone applications? http://stackoverflow.com/questions/220630/how-to-share-custom-data-between-iphone-applications There are two different ways you might go about this. 1 The data you need to share is non persistent. In other words you need to launch one application with a piece of data that it can do something.. piece of data that it can do something with. In this case you would register a special URL scheme per application. You can find out more information about URL schemes via Craig Hockenberry in his redacted.. URL schemes via Craig Hockenberry in his redacted blog post . 2 The data you need to share is persistent. In other words you need something like a data file that both applications can read and write..
Is it possible to configure a UITableView to allow multiple-selection? http://stackoverflow.com/questions/308081/is-it-possible-to-configure-a-uitableview-to-allow-multiple-selection multiple select share improve this question The best way to do this would be to a checkmark per selected row. You can do that by setting the accessoryType on the selected UITableViewCell instances..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework so that we can squash the return value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform.. perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that some callback gets triggered every.. routines return values that need to be scaled by different amounts in order to be correct as per the math In this case... scale float 1.0 2 n vDSP_vsmul A.realp 1 scale A.realp 1 nOver2 vDSP_vsmul..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer this question For anyone else wondering how to draw an inner shadow using Core Graphics as per Costique suggestion then this is how on iOS adjust as needed In your drawRect method... CGRect bounds.. to the context CGContextAddPath context visiblePath CGContextClip context Now setup the shadow properties on the context aColor UIColor colorWithRed 0.0f green 0.0f blue 0.0f alpha 0.5f CGContextSaveGState..
Why NSUserDefaults failed to save NSMutableDictionary in iPhone SDK? http://stackoverflow.com/questions/471830/why-nsuserdefaults-failed-to-save-nsmutabledictionary-in-iphone-sdk to NSCoding . I am getting this error NSUserDefaults setObject forKey Attempt to insert non property value.... of class NSCFDictionary. Any solution for this iphone objective c cocoa touch nsuserdefaults.. because i need to convert to from NSData everytime but it just works. Here is one example per request Save NSUserDefaults defaults NSUserDefaults standardUserDefaults NSMutableArray arr ... set..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees having to split the rotation into pieces. As an example the following code will spin a view once per second for a specified number of seconds. You can easily modify it to spin a view by a certain number..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers previous answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless.. of how to do this visually using Interface Builder take a look at this tutorial . Third and perhaps most importantly note that the best practices mentioned in the Stanford presentation are much easier..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain use will sometimes throw up innumerable errors and you will be unable to use them until the developers release an update which is compatible with ARC. Edit I recently discovered that you can turn off ARC.. an update which is compatible with ARC. Edit I recently discovered that you can turn off ARC on a per file basis. See pixelfreak 's answer . So my advice still stands but now the 3rd party libraries shouldn't..
UIDevice uniqueIdentifier Deprecated - What To Do Now? http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now Deprecated What To Do Now It has just come to light that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and above. No alternative method or property appears to be available or forthcoming... UIDevice uniqueIdentifier property is deprecated in iOS 5 and above. No alternative method or property appears to be available or forthcoming. Many of our existing apps are tightly dependent on this property.. appears to be available or forthcoming. Many of our existing apps are tightly dependent on this property for uniquely identifying a particular device. Can anyone suggest any ideas how we might handle this..
Custom UINavigationBar Background http://stackoverflow.com/questions/704558/custom-uinavigationbar-background an application built with the NavigationView template so it is not done in my root controller as per the example iphone objective c share improve this question You just have to overload drawRect like..
Open source CoverFlow library for iPhone [closed] http://stackoverflow.com/questions/718984/open-source-coverflow-library-for-iphone like APIs or libraries available for the iPhone I've found one implementation that is licensed per application however I'd much prefer to go the open source route. Also I'm interested in libraries that..
Programmatically Request Access to Contacts http://stackoverflow.com/questions/12648244/programmatically-request-access-to-contacts Request Access to Contacts Since updating to iOS 6 I've noticed that my code to add a contact to iPhone's address book no longer works. I believe this is a permission related problem since Apple now requires user permission before accessing contacts fixing this issue http www.cultofmac.com 179733 19 of ios apps access.. noticed that my code to add a contact to iPhone's address book no longer works. I believe this is a permission related problem since Apple now requires user permission before accessing contacts fixing this issue http www.cultofmac.com 179733 19 of ios apps access your address book without your permission until ios 6 report.. now requires user permission before accessing contacts fixing this issue http www.cultofmac.com 179733 19 of ios apps access your address book without your permission until ios 6 report . I expected the app to automatically ask permission to access contacts like in the screenshot below but it doesn't. Trying to add the..
http://stackoverflow.com/questions/1305127/free-weather-api application. iphone weather api share improve this question These are not iPhone specific but free weather APIs. Forecast.io has 1 000 free api calls per day and then it's 1 for every 10 000 requests after that. https developer.forecast.io Big list of free paid http blog.programmableweb.com 2012 01 11 12 json weather.. are not iPhone specific but free weather APIs. Forecast.io has 1 000 free api calls per day and then it's 1 for every 10 000 requests after that. https developer.forecast.io Big list of free paid http blog.programmableweb.com 2012 01 11 12 json weather apis World Weather Online API example http free.worldweatheronline.com..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone the RGB values for a pixel on an image on the iphone I am writing an iPhone application and need to essentially implement something equivalent to the 'eyedropper' tool in photoshop where you can touch a point on the image and capture the RGB values for the pixel in question to determine and match its color. Getting the UIImage.. @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context. Pre multiplied RGBA 8 bits per component. The source image format will be converted to the format specified here by CGBitmapContextCreate. self setContext CGBitmapContextCreate void pixelData.. to a pixel typedef struct RGBPixel byte red byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from Quartz CGImage held in receiver self UInt8 pixelByteData..
Symbolicating iPhone App Crash Reports http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports above using CD command atos arch armv7 o YOURAPP.app YOURAPP MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which the app crashed as per the report. Ex atos arch armv7 o 'app name.app' 'app name' 0x0003b508 This would show you the exact line method name which resulted in crash. Ex classname functionName..
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines One can achieve the effect of anti aliasing very cheaply using vertices with opacity 0. Here's an image example to explain Comparison with AA You can read a paper about this here http research.microsoft.com en us um people hoppe overdraw.pdf You could do something along this way Colors is a pointer to unsigned bytes 4 per.. about this here http research.microsoft.com en us um people hoppe overdraw.pdf You could do something along this way Colors is a pointer to unsigned bytes 4 per color . Should alternate in opacity. glColorPointer 4 GL_UNSIGNED_BYTE 0 colors glEnableClientState GL_COLOR_ARRAY points is a pointer to floats 2 per vertex glVertexPointer.. bytes 4 per color . Should alternate in opacity. glColorPointer 4 GL_UNSIGNED_BYTE 0 colors glEnableClientState GL_COLOR_ARRAY points is a pointer to floats 2 per vertex glVertexPointer 2 GL_FLOAT 0 points glEnableClientState GL_VERTEX_ARRAY glDrawArrays GL_TRIANGLE_STRIP 0 points_count glDisableClientState GL_VERTEX_ARRAY..
http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph 76 x 76 114 x 114 120 x 120 144 x 144 and 152 x 152 icon sizes. Without counting Spotlight and Settings icon if you don ™t want the OS to interpolate them As per the blog post New Metrics for iOS 7 App Icons . UPDATE As per Apple Guideline App icon OR Icon and Image Sizes Icon dimensions iOS 7 and later Icon dimensions iOS.. Without counting Spotlight and Settings icon if you don ™t want the OS to interpolate them As per the blog post New Metrics for iOS 7 App Icons . UPDATE As per Apple Guideline App icon OR Icon and Image Sizes Icon dimensions iOS 7 and later Icon dimensions iOS 6.1 and earlier Create different sizes of the app icon for..
How to share custom data between iPhone applications? http://stackoverflow.com/questions/220630/how-to-share-custom-data-between-iphone-applications them Thanks iphone cocoa touch share improve this question There are two different ways you might go about this. 1 The data you need to share is non persistent. In other words you need to launch one application with a piece of data that it can do something with. In this case you would register a special URL scheme.. In other words you need to launch one application with a piece of data that it can do something with. In this case you would register a special URL scheme per application. You can find out more information about URL schemes via Craig Hockenberry in his redacted blog post . 2 The data you need to share is persistent. In.. scheme per application. You can find out more information about URL schemes via Craig Hockenberry in his redacted blog post . 2 The data you need to share is persistent. In other words you need something like a data file that both applications can read and write too. As far as I know there isn't a safe way to do this other..
Is it possible to configure a UITableView to allow multiple-selection? http://stackoverflow.com/questions/308081/is-it-possible-to-configure-a-uitableview-to-allow-multiple-selection someone can help Thanks Nick. iphone cocoa touch uitableview multiple select share improve this question The best way to do this would be to a checkmark per selected row. You can do that by setting the accessoryType on the selected UITableViewCell instances to UITableViewCelAccessoryCheckmark. To deselect the row set..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework overwritten That's the reason for all this special packing malarkey so that we can squash the return value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up.. value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that some callback gets triggered every time the microphone gets in 1024 floats. Supposing the.. the documentation for this one... in order to optimise different routines return values that need to be scaled by different amounts in order to be correct as per the math In this case... scale float 1.0 2 n vDSP_vsmul A.realp 1 scale A.realp 1 nOver2 vDSP_vsmul A.imagp 1 scale A.imagp 1 nOver2 share improve this answer..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer Help appreciated... iphone core graphics calayer share improve this question For anyone else wondering how to draw an inner shadow using Core Graphics as per Costique suggestion then this is how on iOS adjust as needed In your drawRect method... CGRect bounds self bounds CGContextRef context UIGraphicsGetCurrentContext.. path Add the visible paths as the clipping path to the context CGContextAddPath context visiblePath CGContextClip context Now setup the shadow properties on the context aColor UIColor colorWithRed 0.0f green 0.0f blue 0.0f alpha 0.5f CGContextSaveGState context CGContextSetShadowWithColor context CGSizeMake 0.0f..
Why NSUserDefaults failed to save NSMutableDictionary in iPhone SDK? http://stackoverflow.com/questions/471830/why-nsuserdefaults-failed-to-save-nsmutabledictionary-in-iphone-sdk NSCoding . Per document NSString and NSArray both are conform to NSCoding . I am getting this error NSUserDefaults setObject forKey Attempt to insert non property value.... of class NSCFDictionary. Any solution for this iphone objective c cocoa touch nsuserdefaults nscoding share improve this question I found out one.. to convert NSData back to the object. It is a little cumbersome because i need to convert to from NSData everytime but it just works. Here is one example per request Save NSUserDefaults defaults NSUserDefaults standardUserDefaults NSMutableArray arr ... set value NSData data NSKeyedArchiver archivedDataWithRootObject..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees a full rotation or many multiples of a full rotation without having to split the rotation into pieces. As an example the following code will spin a view once per second for a specified number of seconds. You can easily modify it to spin a view by a certain number of rotations or by some number of radians. void runSpinAnimationWithDuration..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers instead of just hacking it together. First I agree with the previous answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation data. Second see page 10 of the.. push a controller onto the navigation controller. For an example of how to do this visually using Interface Builder take a look at this tutorial . Third and perhaps most importantly note that the best practices mentioned in the Stanford presentation are much easier to understand if you think about them in the context of..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain work and most noticeably many libraries you might wish to use will sometimes throw up innumerable errors and you will be unable to use them until the developers release an update which is compatible with ARC. Edit I recently discovered that you can turn off ARC on a per file basis. See pixelfreak 's answer . So my advice.. you will be unable to use them until the developers release an update which is compatible with ARC. Edit I recently discovered that you can turn off ARC on a per file basis. See pixelfreak 's answer . So my advice still stands but now the 3rd party libraries shouldn't need to be updated to work with ARC. Here's what Apple..
UIDevice uniqueIdentifier Deprecated - What To Do Now? http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now uniqueIdentifier Deprecated What To Do Now It has just come to light that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and above. No alternative method or property appears to be available or forthcoming. Many of our existing apps are tightly dependent on.. Deprecated What To Do Now It has just come to light that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and above. No alternative method or property appears to be available or forthcoming. Many of our existing apps are tightly dependent on this property for uniquely identifying a particular device. Can anyone.. in iOS 5 and above. No alternative method or property appears to be available or forthcoming. Many of our existing apps are tightly dependent on this property for uniquely identifying a particular device. Can anyone suggest any ideas how we might handle this problem going forward The suggestion from the documentation..
Custom UINavigationBar Background http://stackoverflow.com/questions/704558/custom-uinavigationbar-background Also where do I instatiate the NavigationController as I have an application built with the NavigationView template so it is not done in my root controller as per the example iphone objective c share improve this question You just have to overload drawRect like that @implementation UINavigationBar CustomImage void drawRect..
Open source CoverFlow library for iPhone [closed] http://stackoverflow.com/questions/718984/open-source-coverflow-library-for-iphone library for iPhone closed Are there any open source CoverFlow like APIs or libraries available for the iPhone I've found one implementation that is licensed per application however I'd much prefer to go the open source route. Also I'm interested in libraries that use only public APIs as using non public APIs might keep..
Programmatically Request Access to Contacts http://stackoverflow.com/questions/12648244/programmatically-request-access-to-contacts to iOS 6 I've noticed that my code to add a contact to iPhone's address book no longer works. I believe this is a permission related problem since Apple now requires user permission before accessing contacts fixing this issue http www.cultofmac.com.. to iPhone's address book no longer works. I believe this is a permission related problem since Apple now requires user permission before accessing contacts fixing this issue http www.cultofmac.com 179733 19 of ios apps access your address book.. contacts fixing this issue http www.cultofmac.com 179733 19 of ios apps access your address book without your permission until ios 6 report . I expected the app to automatically ask permission to access contacts like in the screenshot..
http://stackoverflow.com/questions/1305127/free-weather-api improve this question These are not iPhone specific but free weather APIs. Forecast.io has 1 000 free api calls per day and then it's 1 for every 10 000 requests after that. https developer.forecast.io Big list of free paid http blog.programmableweb.com.. APIs. Forecast.io has 1 000 free api calls per day and then it's 1 for every 10 000 requests after that. https developer.forecast.io Big list of free paid http blog.programmableweb.com 2012 01 11 12 json weather apis World Weather Online API..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone the iphone I am writing an iPhone application and need to essentially implement something equivalent to the 'eyedropper' tool in photoshop where you can touch a point on the image and capture the RGB values for the pixel in question to determine.. color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context. Pre multiplied RGBA 8 bits per component. The source image format will be converted to the format specified here by CGBitmapContextCreate. self setContext.. byte red byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from Quartz..
Symbolicating iPhone App Crash Reports http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports o YOURAPP.app YOURAPP MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which the app crashed as per the report. Ex atos arch armv7 o 'app name.app' 'app name' 0x0003b508 This would show you the exact line method name which..
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines very cheaply using vertices with opacity 0. Here's an image example to explain Comparison with AA You can read a paper about this here http research.microsoft.com en us um people hoppe overdraw.pdf You could do something along this way Colors.. en us um people hoppe overdraw.pdf You could do something along this way Colors is a pointer to unsigned bytes 4 per color . Should alternate in opacity. glColorPointer 4 GL_UNSIGNED_BYTE 0 colors glEnableClientState GL_COLOR_ARRAY points.. opacity. glColorPointer 4 GL_UNSIGNED_BYTE 0 colors glEnableClientState GL_COLOR_ARRAY points is a pointer to floats 2 per vertex glVertexPointer 2 GL_FLOAT 0 points glEnableClientState GL_VERTEX_ARRAY glDrawArrays GL_TRIANGLE_STRIP 0 points_count..
http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph and 152 x 152 icon sizes. Without counting Spotlight and Settings icon if you don ™t want the OS to interpolate them As per the blog post New Metrics for iOS 7 App Icons . UPDATE As per Apple Guideline App icon OR Icon and Image Sizes Icon dimensions.. icon if you don ™t want the OS to interpolate them As per the blog post New Metrics for iOS 7 App Icons . UPDATE As per Apple Guideline App icon OR Icon and Image Sizes Icon dimensions iOS 7 and later Icon dimensions iOS 6.1 and earlier Create..
How to share custom data between iPhone applications? http://stackoverflow.com/questions/220630/how-to-share-custom-data-between-iphone-applications improve this question There are two different ways you might go about this. 1 The data you need to share is non persistent. In other words you need to launch one application with a piece of data that it can do something with. In this case.. application with a piece of data that it can do something with. In this case you would register a special URL scheme per application. You can find out more information about URL schemes via Craig Hockenberry in his redacted blog post . 2 The.. more information about URL schemes via Craig Hockenberry in his redacted blog post . 2 The data you need to share is persistent. In other words you need something like a data file that both applications can read and write too. As far as I know..
Is it possible to configure a UITableView to allow multiple-selection? http://stackoverflow.com/questions/308081/is-it-possible-to-configure-a-uitableview-to-allow-multiple-selection touch uitableview multiple select share improve this question The best way to do this would be to a checkmark per selected row. You can do that by setting the accessoryType on the selected UITableViewCell instances to UITableViewCelAccessoryCheckmark...
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework special packing malarkey so that we can squash the return value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on.. value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that some callback gets triggered every time the microphone.. to optimise different routines return values that need to be scaled by different amounts in order to be correct as per the math In this case... scale float 1.0 2 n vDSP_vsmul A.realp 1 scale A.realp 1 nOver2 vDSP_vsmul A.imagp 1 scale A.imagp..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer calayer share improve this question For anyone else wondering how to draw an inner shadow using Core Graphics as per Costique suggestion then this is how on iOS adjust as needed In your drawRect method... CGRect bounds self bounds CGContextRef.. as the clipping path to the context CGContextAddPath context visiblePath CGContextClip context Now setup the shadow properties on the context aColor UIColor colorWithRed 0.0f green 0.0f blue 0.0f alpha 0.5f CGContextSaveGState context CGContextSetShadowWithColor..
Why NSUserDefaults failed to save NSMutableDictionary in iPhone SDK? http://stackoverflow.com/questions/471830/why-nsuserdefaults-failed-to-save-nsmutabledictionary-in-iphone-sdk both are conform to NSCoding . I am getting this error NSUserDefaults setObject forKey Attempt to insert non property value.... of class NSCFDictionary. Any solution for this iphone objective c cocoa touch nsuserdefaults nscoding share.. It is a little cumbersome because i need to convert to from NSData everytime but it just works. Here is one example per request Save NSUserDefaults defaults NSUserDefaults standardUserDefaults NSMutableArray arr ... set value NSData data NSKeyedArchiver..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees full rotation without having to split the rotation into pieces. As an example the following code will spin a view once per second for a specified number of seconds. You can easily modify it to spin a view by a certain number of rotations or by..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers I agree with the previous answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation.. controller. For an example of how to do this visually using Interface Builder take a look at this tutorial . Third and perhaps most importantly note that the best practices mentioned in the Stanford presentation are much easier to understand if..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain you might wish to use will sometimes throw up innumerable errors and you will be unable to use them until the developers release an update which is compatible with ARC. Edit I recently discovered that you can turn off ARC on a per file basis... developers release an update which is compatible with ARC. Edit I recently discovered that you can turn off ARC on a per file basis. See pixelfreak 's answer . So my advice still stands but now the 3rd party libraries shouldn't need to be updated..
UIDevice uniqueIdentifier Deprecated - What To Do Now? http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now uniqueIdentifier Deprecated What To Do Now It has just come to light that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and above. No alternative method or property appears to be available or forthcoming. Many of our.. to light that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and above. No alternative method or property appears to be available or forthcoming. Many of our existing apps are tightly dependent on this property for uniquely.. method or property appears to be available or forthcoming. Many of our existing apps are tightly dependent on this property for uniquely identifying a particular device. Can anyone suggest any ideas how we might handle this problem going forward..
Custom UINavigationBar Background http://stackoverflow.com/questions/704558/custom-uinavigationbar-background as I have an application built with the NavigationView template so it is not done in my root controller as per the example iphone objective c share improve this question You just have to overload drawRect like that @implementation..
Open source CoverFlow library for iPhone [closed] http://stackoverflow.com/questions/718984/open-source-coverflow-library-for-iphone open source CoverFlow like APIs or libraries available for the iPhone I've found one implementation that is licensed per application however I'd much prefer to go the open source route. Also I'm interested in libraries that use only public APIs..
http://stackoverflow.com/questions/10181349/how-to-insert-uiimageview-in-uitextview-in-the-same-way-that-iphone-default-mess doesn't support adding image inline with text. In fact it doesn't really support anything other than multiline text. Per your comment below there are three things I can think of to get the image as part of the text entry box They're not using.. subviews as needed. Both 2 3 are very similar just slightly different approaches and probably your best approach. Personally I think 3 is probably the best since it give you the most control over the position of both views but 2 should also..
Apple PNS (push notification services) sample code http://stackoverflow.com/questions/1052645/apple-pns-push-notification-services-sample-code 'badge' 42 'test_data' 'foo' 'bar' # Certificate issued by apple and converted to .pem format with openSSL # Per Apple's Push Notification Guide end of chapter 3 first export the cert in p12 format # openssl pkcs12 in cert.p12 out cert.pem..
Mobile Web - Disable long-touch/taphold text selection http://stackoverflow.com/questions/11237936/mobile-web-disable-long-touch-taphold-text-selection not selectable p p This text is selectable p Sample jQuery document .ready function '.notSelectable' .disableSelection Per your message comment I still need to be able to trigger events notably touchstart touchmove and touchend on the elements...
EXC_BAD_ACCESS (SIGSEGV) crash http://stackoverflow.com/questions/1733317/exc-bad-access-sigsegv-crash Code Type X86 Native Parent Process launchd 64 Interval Since Last Report 34544 sec Crashes Since Last Report 1 Per App Interval Since Last Report 0 sec Per App Crashes Since Last Report 2 Date Time 2009 11 14 10 17 50.058 0530 OS Version.. launchd 64 Interval Since Last Report 34544 sec Crashes Since Last Report 1 Per App Interval Since Last Report 0 sec Per App Crashes Since Last Report 2 Date Time 2009 11 14 10 17 50.058 0530 OS Version Mac OS X 10.5.8 9L30 Report Version 6..
XCode 5 Crashes on AppStore Validation http://stackoverflow.com/questions/18913964/xcode-5-crashes-on-appstore-validation OS Version Mac OS X 10.8.5 12F37 Report Version 10 Interval Since Last Report 8761 sec Crashes Since Last Report 8 Per App Interval Since Last Report 5941 sec Per App Crashes Since Last Report 8 Anonymous UUID B3570A30 11F9 5E70 9890 7B380C40FAE3.. Version 10 Interval Since Last Report 8761 sec Crashes Since Last Report 8 Per App Interval Since Last Report 5941 sec Per App Crashes Since Last Report 8 Anonymous UUID B3570A30 11F9 5E70 9890 7B380C40FAE3 Crashed Thread 0 Dispatch queue com.apple.main..
NSManagedObjects that I own being released by main.m? http://stackoverflow.com/questions/2375551/nsmanagedobjects-that-i-own-being-released-by-main-m to free those objects even though they are in a retained NSDictionary that I have responsibility for releasing EDIT Per request here is the NSZombieEnabled output CFString retain message sent to deallocated instance 0x3b300b0 Backtrace after..
NSDateFormatter's init method is deprecated? http://stackoverflow.com/questions/3182314/nsdateformatters-init-method-is-deprecated init method is deprecated Per http developer.apple.com iphone library documentation Cocoa Reference Foundation Classes NSDateFormatter_Class Reference..
Disable touches on UIView background so that buttons on lower views are clickable http://stackoverflow.com/questions/3427619/disable-touches-on-uiview-background-so-that-buttons-on-lower-views-are-clickabl hierarchy respond to an event at this point . If you say NO event processing continues below you in the visible stack. Per the documentation the default implementation just checks whether the point is in the bounds of the view at all. Your strategy..
How to make something like iPhone Folders? http://stackoverflow.com/questions/4493837/how-to-make-something-like-iphone-folders In other words I want my view to split somewhere in the middle and reveal a view underneath it. Is this possible EDIT Per the suggestion below I could take a screenshot of my application by doing this UIGraphicsBeginImageContext self.view.bounds.size..
UIFileSharingEnabled has no effect http://stackoverflow.com/questions/4546334/uifilesharingenabled-has-no-effect has no effect I've added UIFileSharingEnabled to the .plist. Per suggestions I have removed the app and redeployed it several times attempted to disconnect after redeploying I have not..
Why NSUserDefaults failed to save NSMutableDictionary in iPhone SDK? http://stackoverflow.com/questions/471830/why-nsuserdefaults-failed-to-save-nsmutabledictionary-in-iphone-sdk NSMutableDictionary is NSString the value type is NSArray which contains a list of object which implements NSCoding . Per document NSString and NSArray both are conform to NSCoding . I am getting this error NSUserDefaults setObject forKey Attempt..
I want To track The Speed Of the fingure movement in pixel Per Second Is It Possible Any WaY? http://stackoverflow.com/questions/5075291/i-want-to-track-the-speed-of-the-fingure-movement-in-pixel-per-second-is-it-poss want To track The Speed Of the fingure movement in pixel Per Second Is It Possible Any WaY I want to track The speed Of the Touch moved in pixel Second Any Budy Having idea For This..
How to swap views using a swipe gesture XCode http://stackoverflow.com/questions/5684099/how-to-swap-views-using-a-swipe-gesture-xcode to do a similar method formatted differently If so how do I sort this out and format it. Thank You Edit Answer as Per Comment on Question Place this in your viewDidLoad UISwipeGestureRecognizer swipeRecognizer UISwipeGestureRecognizer alloc..
Use of VAO around VBO in Open ES iPhone app Causes EXC_BAD_ACCESS When Call to glDrawElements http://stackoverflow.com/questions/6240863/use-of-vao-around-vbo-in-open-es-iphone-app-causes-exc-bad-access-when-call-to-g share improve this question Remove glBindBuffer GL_ELEMENT_ARRAY_BUFFER 0 from the end of your setup function. Per the specification for OES_vertex_array_object a vertex array object encapsulates all state except the array buffer binding..
How to measure true FPS performance of OpenGL ES? http://stackoverflow.com/questions/6586635/how-to-measure-true-fps-performance-of-opengl-es
Right design pattern for tabbed navigation views? http://stackoverflow.com/questions/6600956/right-design-pattern-for-tabbed-navigation-views These navigation controllers have completely different behavior. So how do I set this up in terms of classes Per Apple's documentation I'm not supposed to subclass UINavigationViewController . So where do I put the code that drives each..
Permutations/Anagrams in Objective-C — I am missing something http://stackoverflow.com/questions/6617253/permutations-anagrams-in-objective-c-i-am-missing-something Anagrams in Objective C &mdash I am missing something code below regarding my question Per this stack overflow.. Anagrams in Objective C &mdash I am missing something code below regarding my question Per this stack overflow question I used Pegolon's approach to generating all possible permutations of a group of characters.. a string. Would anyone know how i would alter the following code to get it to do this This is much like Generate All Permutations of All Lengths but for fear of them needing answer to homework they did not leave code. I have a sample of what..
Why timer stops when scrolling in UIWebView iPhone? [duplicate] http://stackoverflow.com/questions/6684016/why-timer-stops-when-scrolling-in-uiwebview-iphone iphone cocoa touch uiwebview nstimer share improve this question You have to add the timer to another RunLoopMode. Per default a timer is added to the NSDefaultRunLoopMode. That means that the timer is only executing when the app ™s run loop..
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