2014/10/15 下午 10:14:11

iphone Programming Glossary: should

How to check for an active Internet Connection on iPhone SDK?

http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk

where you receive a memory warning and the observer never gets unregistered so you should account for that as well. Note The domain you use doesn't matter. It's just testing for a gateway to..

How to add a breakpoint to objc_exception_throw?

http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw

this was the answer from the brad larson on this SO question If you add two breakpoints you should be able to debug these exceptions. To do this go to Run Show Breakpoints and create two global breakpoints.. breakpoints I do them globally because they are so useful in all my applications . The first should be named objc_exception_throw and its location should be libobjc.A.dylib . The second should be NSException.. so useful in all my applications . The first should be named objc_exception_throw and its location should be libobjc.A.dylib . The second should be NSException raise and its location should be CoreFoundation..

How to develop or migrate apps for iPhone 5 screen resolution?

http://stackoverflow.com/questions/12395200/how-to-develop-or-migrate-apps-for-iphone-5-screen-resolution

is required to develop new or transition already existing applications to the new screen size What should we keep in mind to make applications universal for both the older displays and the new widescreen aspect.. black margins on top and bottom . Test your app and hopefully do nothing else since everything should work magically if you had set auto resizing masks properly. If you didn't adjust your view layouts with..

iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size

How to develop or migrate apps for iPhone 5 screen resolution I was just wondering with how should we deal with the iPhone 5 bigger screen size. As it has more pixels in height things like GCRectMake.. enable your apps to work with iPhone 5 you need to add a retina version of the launcher image. It should be named Default 568h@2x.png . And it has to be retina quality there's no backward compatibility here..

How to detect iPhone 5 (widescreen devices)?

http://stackoverflow.com/questions/12446990/how-to-detect-iphone-5-widescreen-devices

have to detect whether the user has an iPhone with 3.5 or 4 screen and then apply the view. How should I do that iphone ios objective c screen device share improve this question First of all you shouldn't.. I do that iphone ios objective c screen device share improve this question First of all you shouldn't rebuild all your views to fit a new screen nor use different views for different screen sizes. Use..

Add UIPickerView & a Button in Action sheet - How?

http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how

Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents of an ActionSheet..

AES Encryption for an NSString on the iPhone

http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone

in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first..

Symbolicating iPhone App Crash Reports

http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports

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'..

How to access SOAP services from iPhone

http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone

improve this question One word Don't. OK obviously that isn't a real answer. But still SOAP should be avoided at all costs. Is it possible to add a proxy server between the iPhone and the web service..

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c

object nil return self void receiveTestNotification NSNotification notification notification name should always be @ TestNotification unless you use this method for observation of other notifications as well...

Check iPhone iOS Version

http://stackoverflow.com/questions/3339722/check-iphone-ios-version

this question You can get the OS version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication of device or OS capabilities. There is usually..

How do I apply a perspective transform to a UIView?

http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview

fraction for your initial transform then apply your layer rotation transforms to that. You should also be able to do the following UIView myView self subviews objectAtIndex 0 CALayer layer myView.layer.. the program at the very bottom of the page implements this kind of perspective operation. The code should be reasonably simple to read. The sublayerTransform you refer to in your response is a transform that..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

_myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective c coding style..

How do I create delegates in Objective-C?

http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c

and they're done. This method is straight forward and common in Apple's libraries but new code should use the more modern approach below. 2 A Formal Protocol The newer option is to declare a formal protocol...

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

installs the app you will get a new one each time. But you might want it to be not unique i. e. it should stay the same when the user uninstalls and re installs the app. This requires a bit of effort since.. by others the preferred solution since iOS 6 is UIDevice identifierForVendor . In most cases you should be able use it as a drop in replacement to the old UIDevice uniqueIdentifier but a UUID that is created..

Get to UIViewController from UIView on iPhone?

http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone

should instead be independent of the view controller and be able to work in different contexts. Should you need the view to interface in a way with the view controller the recommended way and what Apple..

OpenGL ES iPhone - drawing anti aliased lines

http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines

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..

http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph

icon requirements from Apple. I could not see 120x120 appearing anywhere Is this iOS 7 specific Should I include an icon named Icon 120.png or something Update I added three icons to the resource folder..

Easiest way to support multiple orientations? How do I load a custom NIB when the application is in Landscape?

http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th

nib is not loaded and it continues with the myViewController.xib file. What's wrong with my call Should I specify a bundle Thanks iphone iphone sdk 3.0 uiviewcontroller nib xib share improve this question..

Is it true that one should not use NSLog() on production code?

http://stackoverflow.com/questions/300673/is-it-true-that-one-should-not-use-nslog-on-production-code

Xcode gcc would automatically strip those calls out when building my Release Distribution builds. Should I avoid using this If so what alternatives are most common between experienced Objective C programmers..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

NSString myStringProperty In the implementation @synthesize myStringProperty _myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good..

Set line height in UITextView

http://stackoverflow.com/questions/3760924/set-line-height-in-uitextview

to but it's such an easy way to achieve the goals of this question that you may as well try it. Should the app be rejected you can spend the probably significant time on a more difficult solution. share..

Round two corners in UIView

http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview

problems implementing it. Here is my drawRect method void drawRect CGRect rect super drawRect rect Should I uncomment this int radius 5 CGContextRef context UIGraphicsGetCurrentContext CGContextBeginPath context..

How to distribute ios application wirelessly without managing UDIDs and recompilation

http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

iCloud basics and code sample [closed]

http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample

old pre iCloud days . Right now my sandbox is totally empty but I don't know if this is correct. Should I keep another copy of text.txt in there This feels like cluttering my data structure... as there is..

How to check for an active Internet Connection on iPhone SDK?

http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk

removeObserver self Note There might be an instance using viewWillDisappear where you receive a memory warning and the observer never gets unregistered so you should account for that as well. Note The domain you use doesn't matter. It's just testing for a gateway to any domain. Important Note The Reachability class is one of..

How to add a breakpoint to objc_exception_throw?

http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw

to add a breakpoint to objc_exception_throw this was the answer from the brad larson on this SO question If you add two breakpoints you should be able to debug these exceptions. To do this go to Run Show Breakpoints and create two global breakpoints I do them globally because they are so useful in all.. To do this go to Run Show Breakpoints and create two global breakpoints I do them globally because they are so useful in all my applications . The first should be named objc_exception_throw and its location should be libobjc.A.dylib . The second should be NSException raise and its location should be CoreFoundation . Now.. two global breakpoints I do them globally because they are so useful in all my applications . The first should be named objc_exception_throw and its location should be libobjc.A.dylib . The second should be NSException raise and its location should be CoreFoundation . Now if you start debugging your application with breakpoints..

How to develop or migrate apps for iPhone 5 screen resolution?

http://stackoverflow.com/questions/12395200/how-to-develop-or-migrate-apps-for-iphone-5-screen-resolution

aspect ratio and a new resolution 640 x 1136 pixels . What is required to develop new or transition already existing applications to the new screen size What should we keep in mind to make applications universal for both the older displays and the new widescreen aspect ratio iphone ios screen resolution iphone 5 share improve.. get 1136 px screen height without it you will get 960 px with black margins on top and bottom . Test your app and hopefully do nothing else since everything should work magically if you had set auto resizing masks properly. If you didn't adjust your view layouts with proper auto resizing masks or look into Auto Layout if you..

iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size

to deal with iPhone 5 screen size duplicate Possible Duplicate How to develop or migrate apps for iPhone 5 screen resolution I was just wondering with how should we deal with the iPhone 5 bigger screen size. As it has more pixels in height things like GCRectMake that use coordinates and just doubled the pixels with the retina.. where the extra points pixels just show up black. Edit To enable your apps to work with iPhone 5 you need to add a retina version of the launcher image. It should be named Default 568h@2x.png . And it has to be retina quality there's no backward compatibility here You could also select this image from within Xcode. Go to..

How to detect iPhone 5 (widescreen devices)?

http://stackoverflow.com/questions/12446990/how-to-detect-iphone-5-widescreen-devices

and 5 of course I have to build every window twice but I also have to detect whether the user has an iPhone with 3.5 or 4 screen and then apply the view. How should I do that iphone ios objective c screen device share improve this question First of all you shouldn't rebuild all your views to fit a new screen nor use different.. with 3.5 or 4 screen and then apply the view. How should I do that iphone ios objective c screen device share improve this question First of all you shouldn't rebuild all your views to fit a new screen nor use different views for different screen sizes. Use the auto resizing capabilities of iOS so your views can adjust..

Add UIPickerView & a Button in Action sheet - How?

http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how

iphone uipickerview share improve this question Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents of an ActionSheet as it can lead to serious invalid context errors in iOS 7...

AES Encryption for an NSString on the iPhone

http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone

I'd have to generate the encryption key with the passcode in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first comment on this post but I've had no luck so far. Apple's..

Symbolicating iPhone App Crash Reports

http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports

terminal application and go to the folder created 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..

How to access SOAP services from iPhone

http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone

REST based API . Gero iphone ios web services soap wsdl share improve this question One word Don't. OK obviously that isn't a real answer. But still SOAP should be avoided at all costs. Is it possible to add a proxy server between the iPhone and the web service Perhaps something that converts REST into SOAP for you You..

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c

@selector receiveTestNotification name @ TestNotification object nil return self void receiveTestNotification NSNotification notification notification name should always be @ TestNotification unless you use this method for observation of other notifications as well. if notification name isEqualToString @ TestNotification..

Check iPhone iOS Version

http://stackoverflow.com/questions/3339722/check-iphone-ios-version

3.1.3 How can I do this iphone version ios share improve this question You can get the OS version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more reliable method of checking whether a particular feature..

How do I apply a perspective transform to a UIView?

http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview

this works but it does. You'll need to set this value to a negative fraction for your initial transform then apply your layer rotation transforms to that. You should also be able to do the following UIView myView self subviews objectAtIndex 0 CALayer layer myView.layer CATransform3D rotationAndPerspectiveTransform CATransform3DIdentity.. based on an example by Bill Dudney. The newest version of the program at the very bottom of the page implements this kind of perspective operation. The code should be reasonably simple to read. The sublayerTransform you refer to in your response is a transform that is applied to the sublayers of your UIView's CALayer . If..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

In the implementation @synthesize myStringProperty _myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective c coding style share improve this question Current suggested Objective..

How do I create delegates in Objective-C?

http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c

calling this method. Delegates simply implement this method and they're done. This method is straight forward and common in Apple's libraries but new code should use the more modern approach below. 2 A Formal Protocol The newer option is to declare a formal protocol. The declaration would look like this @protocol NSWindowNotifications..

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

by CFUUIDCreate is unique if a user uninstalls and re installs the app you will get a new one each time. But you might want it to be not unique i. e. it should stay the same when the user uninstalls and re installs the app. This requires a bit of effort since the most reliable per device identifier seems to be the MAC.. if the interface has no IP is down. Edit 2 As was pointed out by others the preferred solution since iOS 6 is UIDevice identifierForVendor . In most cases you should be able use it as a drop in replacement to the old UIDevice uniqueIdentifier but a UUID that is created when the app starts for the first time is what Apple seems..

Get to UIViewController from UIView on iPhone?

http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone

not need to access the view controller directly. The view should instead be independent of the view controller and be able to work in different contexts. Should you need the view to interface in a way with the view controller the recommended way and what Apple does across Cocoa is to use the delegate pattern. An example..

OpenGL ES iPhone - drawing anti aliased lines

http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines

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 2..

http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph

in .png format How can I fix this problem Here are the current icon requirements from Apple. I could not see 120x120 appearing anywhere Is this iOS 7 specific Should I include an icon named Icon 120.png or something Update I added three icons to the resource folder Icon 120.png 120x120 Icon 76.png 76x76 Icon 152.png 152x152..

Easiest way to support multiple orientations? How do I load a custom NIB when the application is in Landscape?

http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th

initWithNibName function call in the viewDidLoad method that nib is not loaded and it continues with the myViewController.xib file. What's wrong with my call Should I specify a bundle Thanks iphone iphone sdk 3.0 uiviewcontroller nib xib share improve this question You have to load one view then check orientation and load..

Is it true that one should not use NSLog() on production code?

http://stackoverflow.com/questions/300673/is-it-true-that-one-should-not-use-nslog-on-production-code

to sprinkle NSLog function calls throughout my code and that Xcode gcc would automatically strip those calls out when building my Release Distribution builds. Should I avoid using this If so what alternatives are most common between experienced Objective C programmers iphone objective c nslog share improve this question ..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

Whatever NSString _myStringProperty @property nonatomic copy NSString myStringProperty In the implementation @synthesize myStringProperty _myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective..

Set line height in UITextView

http://stackoverflow.com/questions/3760924/set-line-height-in-uitextview

Round two corners in UIView

http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview

corners of a view and got a great response but am having problems implementing it. Here is my drawRect method void drawRect CGRect rect super drawRect rect Should I uncomment this int radius 5 CGContextRef context UIGraphicsGetCurrentContext CGContextBeginPath context CGContextAddArc context rect.origin.x radius rect.origin.y..

How to distribute ios application wirelessly without managing UDIDs and recompilation

http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

iCloud basics and code sample [closed]

http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample

into the 'old' sandbox of my app i.e. as it used to be in the old pre iCloud days . Right now my sandbox is totally empty but I don't know if this is correct. Should I keep another copy of text.txt in there This feels like cluttering my data structure... as there is one text.txt in the cloud one in the iCloud sandbox on my device..

How to check for an active Internet Connection on iPhone SDK?

http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk

an instance using viewWillDisappear where you receive a memory warning and the observer never gets unregistered so you should account for that as well. Note The domain you use doesn't matter. It's just testing for a gateway to any domain. Important..

How to add a breakpoint to objc_exception_throw?

http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw

to objc_exception_throw this was the answer from the brad larson on this SO question If you add two breakpoints you should be able to debug these exceptions. To do this go to Run Show Breakpoints and create two global breakpoints I do them globally.. and create two global breakpoints I do them globally because they are so useful in all my applications . The first should be named objc_exception_throw and its location should be libobjc.A.dylib . The second should be NSException raise and its.. because they are so useful in all my applications . The first should be named objc_exception_throw and its location should be libobjc.A.dylib . The second should be NSException raise and its location should be CoreFoundation . Now if you start..

How to develop or migrate apps for iPhone 5 screen resolution?

http://stackoverflow.com/questions/12395200/how-to-develop-or-migrate-apps-for-iphone-5-screen-resolution

1136 pixels . What is required to develop new or transition already existing applications to the new screen size What should we keep in mind to make applications universal for both the older displays and the new widescreen aspect ratio iphone ios.. will get 960 px with black margins on top and bottom . Test your app and hopefully do nothing else since everything should work magically if you had set auto resizing masks properly. If you didn't adjust your view layouts with proper auto resizing..

iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size

Possible Duplicate How to develop or migrate apps for iPhone 5 screen resolution I was just wondering with how should we deal with the iPhone 5 bigger screen size. As it has more pixels in height things like GCRectMake that use coordinates.. up black. Edit To enable your apps to work with iPhone 5 you need to add a retina version of the launcher image. It should be named Default 568h@2x.png . And it has to be retina quality there's no backward compatibility here You could also select..

How to detect iPhone 5 (widescreen devices)?

http://stackoverflow.com/questions/12446990/how-to-detect-iphone-5-widescreen-devices

twice but I also have to detect whether the user has an iPhone with 3.5 or 4 screen and then apply the view. How should I do that iphone ios objective c screen device share improve this question First of all you shouldn't rebuild all your.. the view. How should I do that iphone ios objective c screen device share improve this question First of all you shouldn't rebuild all your views to fit a new screen nor use different views for different screen sizes. Use the auto resizing..

Add UIPickerView & a Button in Action sheet - How?

http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how

this question Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents of an ActionSheet as it can lead to..

AES Encryption for an NSString on the iPhone

http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone

key with the passcode in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first comment on this..

Symbolicating iPhone App Crash Reports

http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports

created 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..

How to access SOAP services from iPhone

http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone

soap wsdl share improve this question One word Don't. OK obviously that isn't a real answer. But still SOAP should be avoided at all costs. Is it possible to add a proxy server between the iPhone and the web service Perhaps something that..

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c

@ TestNotification object nil return self void receiveTestNotification NSNotification notification notification name should always be @ TestNotification unless you use this method for observation of other notifications as well. if notification..

Check iPhone iOS Version

http://stackoverflow.com/questions/3339722/check-iphone-ios-version

ios share improve this question You can get the OS version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more reliable method..

How do I apply a perspective transform to a UIView?

http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview

this value to a negative fraction for your initial transform then apply your layer rotation transforms to that. You should also be able to do the following UIView myView self subviews objectAtIndex 0 CALayer layer myView.layer CATransform3D rotationAndPerspectiveTransform.. newest version of the program at the very bottom of the page implements this kind of perspective operation. The code should be reasonably simple to read. The sublayerTransform you refer to in your response is a transform that is applied to the..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

myStringProperty _myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective c coding style share improve this..

How do I create delegates in Objective-C?

http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c

implement this method and they're done. This method is straight forward and common in Apple's libraries but new code should use the more modern approach below. 2 A Formal Protocol The newer option is to declare a formal protocol. The declaration..

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

uninstalls and re installs the app you will get a new one each time. But you might want it to be not unique i. e. it should stay the same when the user uninstalls and re installs the app. This requires a bit of effort since the most reliable per.. 2 As was pointed out by others the preferred solution since iOS 6 is UIDevice identifierForVendor . In most cases you should be able use it as a drop in replacement to the old UIDevice uniqueIdentifier but a UUID that is created when the app starts..

Get to UIViewController from UIView on iPhone?

http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone

directly. The view should instead be independent of the view controller and be able to work in different contexts. Should you need the view to interface in a way with the view controller the recommended way and what Apple does across Cocoa is..

purgeIdleCellConnections: found one to purge conn = 0x1d57ba00

http://stackoverflow.com/questions/14754828/purgeidlecellconnections-found-one-to-purge-conn-0x1d57ba00

seen this in the log. I'm connected to NTP servers. Building on iPhone running iOS 6.0 with latest version of XCode. Should I ignore this It doesn't seem to be doing anything else to my app... iphone objective c share improve this question ..

OpenGL ES iPhone - drawing anti aliased lines

http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines

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..

http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph

Here are the current icon requirements from Apple. I could not see 120x120 appearing anywhere Is this iOS 7 specific Should I include an icon named Icon 120.png or something Update I added three icons to the resource folder Icon 120.png 120x120..

Easiest way to support multiple orientations? How do I load a custom NIB when the application is in Landscape?

http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th

method that nib is not loaded and it continues with the myViewController.xib file. What's wrong with my call Should I specify a bundle Thanks iphone iphone sdk 3.0 uiviewcontroller nib xib share improve this question You have to load..

Is it true that one should not use NSLog() on production code?

http://stackoverflow.com/questions/300673/is-it-true-that-one-should-not-use-nslog-on-production-code

my code and that Xcode gcc would automatically strip those calls out when building my Release Distribution builds. Should I avoid using this If so what alternatives are most common between experienced Objective C programmers iphone objective..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

nonatomic copy NSString myStringProperty In the implementation @synthesize myStringProperty _myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good reason for this style..

Tab Bar Application With Navigation Controller

http://stackoverflow.com/questions/369128/tab-bar-application-with-navigation-controller

of is adding a navigation controller to the app so each nib i.e. each tab can drill down to further detail pages. Should I be adding a navigation controller to the main window and creating an IBOutlet for it or should the NC be added to the..

How many times do I release an allocated or retained object?

http://stackoverflow.com/questions/3730804/how-many-times-do-i-release-an-allocated-or-retained-object

is Do I just check if the retainCount is greater than zero and then release it if bg retainCount 0 bg release or Should I release it as many times as its retainCount while bg retainCount 0 bg release Thanks for your help iphone memory cocos2d..

Set line height in UITextView

http://stackoverflow.com/questions/3760924/set-line-height-in-uitextview

not what Apple object to but it's such an easy way to achieve the goals of this question that you may as well try it. Should the app be rejected you can spend the probably significant time on a more difficult solution. share improve this answer..

Round two corners in UIView

http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview

but am having problems implementing it. Here is my drawRect method void drawRect CGRect rect super drawRect rect Should I uncomment this int radius 5 CGContextRef context UIGraphicsGetCurrentContext CGContextBeginPath context CGContextAddArc..

How to distribute ios application wirelessly without managing UDIDs and recompilation

http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

How to write text on image in objective-c iPhone?

http://stackoverflow.com/questions/6992830/how-to-write-text-on-image-in-objective-c-iphone

like this 1 http www.image share.com ipng 839 213.html through programming I have the upper image and text with me. Should I write text on image or any other suggestion for it. I want to make it a complete png image image label and set it as the..

iCloud basics and code sample [closed]

http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample

it used to be in the old pre iCloud days . Right now my sandbox is totally empty but I don't know if this is correct. Should I keep another copy of text.txt in there This feels like cluttering my data structure... as there is one text.txt in the..

What's the best way to use Obj-C 2.0 Properties with mutable objects, such as NSMutableArray?

http://stackoverflow.com/questions/816720/whats-the-best-way-to-use-obj-c-2-0-properties-with-mutable-objects-such-as-ns

NSMutableArray myArray Since we don't have mutablecopy what's the best way to handle this seemingly common situation Should I just write my own setter that does a mutableCopy iphone objective c cocoa osx properties share improve this question..

iOS 5 does not allow to store downloaded data in Documents directory?

http://stackoverflow.com/questions/8209406/ios-5-does-not-allow-to-store-downloaded-data-in-documents-directory

is also present in the same directory which contains the details about the downloaded products. My question is 1. Should I have to change my code to store the downloaded data to Library Caches directory instead of to the Documents directory..

How do I get the CoreData Debug argument to output to the console?

http://stackoverflow.com/questions/822906/how-do-i-get-the-coredata-debug-argument-to-output-to-the-console

Even in Apple's example I get no SQL output in the console. Am I doing something wrong Is Apple's documentation wrong Should I be looking someplace other than the console Has anyone else had success with this argument UPDATE Apple has since fixed..

How to resolve 'unrecognized selector sent to instance'?

http://stackoverflow.com/questions/861626/how-to-resolve-unrecognized-selector-sent-to-instance

memory management static libraries share improve this question 1 Is the synthesize within @implementation block 2 Should you refer to self.classA ClassA alloc init and self.classA.downloadUrl @ ... instead of plain classA 3 In your myApp.m file..

Static string variable in Objective C on iphone

http://stackoverflow.com/questions/980083/static-string-variable-in-objective-c-on-iphone

in class B. But if I access it in class C after assignment in B I am getting it as OldValue. Am I missing something Should i use extern in other classes Thanks Regards Yogini iphone objective c string static share improve this question Objective..

HTTP byte range protocol client behaviour on iPad/iPhone

http://stackoverflow.com/questions/12637728/http-byte-range-protocol-client-behaviour-on-ipad-iphone

involves closing the write side and finishing reading from the read side until a timeout passes but also says Servers SHOULD NOT close a connection in the middle of transmitting a response unless a network or client failure is suspected. So if you..

Facebook iOS SDK 3.1 post image on friends wall error

http://stackoverflow.com/questions/13817590/facebook-ios-sdk-3-1-post-image-on-friends-wall-error

say Insufficient_scope The request requires higher privileges than provided by the access token. The resource server SHOULD respond with the HTTP 403 Forbidden status code and MAY include the scope attribute with the scope necessary to access the..

Subclassing NSOperation to be concurrent and cancellable

http://stackoverflow.com/questions/3859631/subclassing-nsoperation-to-be-concurrent-and-cancellable

@synthesize isFinished _isFinished @synthesize isCancelled _isCancelled BOOL isConcurrent return YES void start WHY SHOULD I PUT THIS if NSThread isMainThread self performSelectorOnMainThread @selector start withObject nil waitUntilDone NO return..

What to use if not “IPHONE UDID”?

http://stackoverflow.com/questions/3860751/what-to-use-if-not-iphone-udid

all the panic stories online this week regarding using an iPhone's UDID. UIDevice currentDevice uniqueIdentifier What SHOULD we be using instead What if the phone is sold to another user... and an app has stored some data on a remote server based..

How Should I Secure a SQLite Database in iOS?

http://stackoverflow.com/questions/4292451/how-should-i-secure-a-sqlite-database-in-ios

to be encrypted so if their iPhone is stolen the thief won't be able to access their health info. The rightful owner SHOULD be able to access their information so different than this question . I'm considering using SQLCipher to encrypt the entire..

How to compare two NSURLs that are practically equivalent but have cosmetic string differences?

http://stackoverflow.com/questions/5801580/how-to-compare-two-nsurls-that-are-practically-equivalent-but-have-cosmetic-stri

are equivalent. This is what it says section 3.2.3 When comparing two URIs to decide if they match or not a client SHOULD use a case sensitive octet by octet comparison of the entire URIs with these exceptions A port that is empty or not given..

Display XIB before UITabBarController?

http://stackoverflow.com/questions/9762975/display-xib-before-uitabbarcontroller

need to load a XIB before my UITabBar shows up more clearly i have my first view which is to the user login NO TABBAR SHOULD BE DISPLAYED when user login the app verify the information and after should load the view with a UITabBarController but..