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2014/10/15 ¤U¤È 10:09:04
iphone Programming Glossary: fineHow do I wrap text in a UITableViewCell without a custom cell http://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell text in a UITableViewCell without a custom cell This is on iPhone 0S 2.0. Answers for 2.1 are fine too though I am unaware of any differences regarding tables. It feels like it should be possible to..
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview to use the image property to display the point on the map with my own icon. I have this working fine. But what I would also like to do is to override the default callout view the bubble that shows up with..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone you flag an app as allowing users to modify documents so if you are using Documents today you are fine as long as you change location when updating for support of user documents. Last there is a cache directory.. you have to have a UIImage in memory and use the UIImageWriteToSavedPhotosAlbum function call defined by UIKit. You have no control over the destination format or compression levels and cannot attach any..
Programmatically get own phone number in iOS http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios is part of the security feature known as the application's sandbox. The sandbox is a set of fine grained controls limiting an application's access to files preferences network resources hardware and..
http://stackoverflow.com/questions/3372333/ipad-keyboard-will-not-dismiss-if-modal-view-controller-presentation-style-is-ui The keyboard refuses to be dismissed. If I comment out this line the keyboard goes away fine. ... I've got two textFields username and password username has a Next button and password has a Done..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework frequency. So as you can see it wouldn't be a very great pitch detector as it doesn't have nearly fine enough granularity. There is a cunning trick Extracting precise frequencies from FFT Bins using phase..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display to capture UIView to UIImage without loss of quality on retina display My code works fine for normal devices but creates blurry images on retina devices. Does anybody know a solution for my..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file NULL filename kCFStringEncodingUTF8 Create a CFURL using the CFString we just defined url CFURLCreateWithFileSystemPath NULL path kCFURLPOSIXPathStyle 0 CFRelease path This dictionary.. CFSTR My Name Create our PDF Context with the CFURL the CGRect we provide and the above defined dictionary pdfContext CGPDFContextCreateWithURL url pageRect myDictionary Cleanup our mess CFRelease.. CIDs for glyphs for 'TimesNewRomanPSMT' The tricky aspect is that the resulting PDF will render fine in some PDF readers but fail to render in other places. So if you have control over the software that..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller as the main controller with..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour of scroll view behaviour on certain phones I'm testing on the 3GS and simulator seem to work fine while the iPhone4 and the 3G don't . Does anyone know how I could get around this clash between the..
http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet variables share improve this question Is never used should be taken literally you only define its value in assignments never use it. This is the same kind of warning you get for local variables.. never use it. This is the same kind of warning you get for local variables if you only define their values and never use it what are they for The static analyzer is thus warning you because typically..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application In case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature @ yyyyMMddHHmmss NSString dateStr fmt stringFromDate someDate fmt release Then it works fine in the US and most locales UNTIL ... someone with their phone set to a 24 hour region sets the 12 24..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown not importing all headers. You could end up with crashes in code that the compiler thinks is fine. This is very rare but could happen. Usually you'll just get a warning that it doesn't know which of..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample my app see code below I check if the user has iCloud enabled. If iCloud is enabled everything is fine. The app goes ahead and looks for text.txt in the cloud. If found it will load it and display it to..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically I added as an subview to the view of the Nib. This has green color and I see it fullscreen. Works fine. Then I created two other View Controllers pretty much the same way. ViewControllerA and ViewControllerB...
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud iphone caching uikit uiimageview imagenamed share improve this question tldr ImagedNamed is fine. It handles memory well. Use it and stop worrying. Edit Nov 2012 Note that this question dates from..
How do I wrap text in a UITableViewCell without a custom cell http://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell do I wrap text in a UITableViewCell without a custom cell This is on iPhone 0S 2.0. Answers for 2.1 are fine too though I am unaware of any differences regarding tables. It feels like it should be possible to get text to wrap without creating a custom cell since a UITableViewCell..
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview stuck. I have a custom annotation view I am using and I want to use the image property to display the point on the map with my own icon. I have this working fine. But what I would also like to do is to override the default callout view the bubble that shows up with the title subtitle when the annotation icon is touched ...
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone that . Also the user will not be able to see anything unless you flag an app as allowing users to modify documents so if you are using Documents today you are fine as long as you change location when updating for support of user documents. Last there is a cache directory where you can put images that you don't care exist for..
Programmatically get own phone number in iOS http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios and data to a unique location in the file system. This restriction is part of the security feature known as the application's sandbox. The sandbox is a set of fine grained controls limiting an application's access to files preferences network resources hardware and so on. The device's phone number is not available within your..
http://stackoverflow.com/questions/3372333/ipad-keyboard-will-not-dismiss-if-modal-view-controller-presentation-style-is-ui UIModalPresentationFormSheet The keyboard refuses to be dismissed. If I comment out this line the keyboard goes away fine. ... I've got two textFields username and password username has a Next button and password has a Done button. The keyboard won't go away if I present this in a..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework complex number is the amount of energy vibrating around that frequency. So as you can see it wouldn't be a very great pitch detector as it doesn't have nearly fine enough granularity. There is a cunning trick Extracting precise frequencies from FFT Bins using phase change between frames to get the precise frequency for a given..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display to capture UIView to UIImage without loss of quality on retina display My code works fine for normal devices but creates blurry images on retina devices. Does anybody know a solution for my issue UIImage imageWithView UIView view UIGraphicsBeginImageContext..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file we provide to this method when we call it path CFStringCreateWithCString NULL filename kCFStringEncodingUTF8 Create a CFURL using the CFString we just defined url CFURLCreateWithFileSystemPath NULL path kCFURLPOSIXPathStyle 0 CFRelease path This dictionary contains extra options mostly for 'signing' the PDF myDictionary.. My PDF File CFDictionarySetValue myDictionary kCGPDFContextCreator CFSTR My Name Create our PDF Context with the CFURL the CGRect we provide and the above defined dictionary pdfContext CGPDFContextCreateWithURL url pageRect myDictionary Cleanup our mess CFRelease myDictionary CFRelease url Done creating our PDF Context now.. in the debug console that look like this Error can't get CIDs for glyphs for 'TimesNewRomanPSMT' The tricky aspect is that the resulting PDF will render fine in some PDF readers but fail to render in other places. So if you have control over the software that will be used to open your PDF you may be able to ignore this..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root of tab bar controller. I would like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller as the main controller with each of the tabs containing separate navigation controllers...
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour the default run mode but unfortunately this breaks some aspects of scroll view behaviour on certain phones I'm testing on the 3GS and simulator seem to work fine while the iPhone4 and the 3G don't . Does anyone know how I could get around this clash between the CADisplayLink and the UIScrollView or know how to fix the UIScrollView..
http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet you can help me iphone objective c osx static analysis instance variables share improve this question Is never used should be taken literally you only define its value in assignments never use it. This is the same kind of warning you get for local variables if you only define their values and never use it what are they.. should be taken literally you only define its value in assignments never use it. This is the same kind of warning you get for local variables if you only define their values and never use it what are they for The static analyzer is thus warning you because typically variables that are never accessed are just remains of..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application background by using UIApplication beginBackgroundTaskWithExpirationHandler In case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature as NSDateFormatter fmt NSDateFormatter alloc init fmt setDateFormat @ yyyyMMddHHmmss NSString dateStr fmt stringFromDate someDate fmt release Then it works fine in the US and most locales UNTIL ... someone with their phone set to a 24 hour region sets the 12 24 hour switch in settings to 12. Then the above starts tacking..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown it to get the wrong info if declare you objects as id and you're not importing all headers. You could end up with crashes in code that the compiler thinks is fine. This is very rare but could happen. Usually you'll just get a warning that it doesn't know which of two method signatures to choose from. 3 See the ARC reference..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample problem What about users who do not use iCloud When I launch my app see code below I check if the user has iCloud enabled. If iCloud is enabled everything is fine. The app goes ahead and looks for text.txt in the cloud. If found it will load it and display it to the user. If text.txt is not found in the cloud it will simply..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically @end The contentView is hooked up to an UIView which I added as an subview to the view of the Nib. This has green color and I see it fullscreen. Works fine. Then I created two other View Controllers pretty much the same way. ViewControllerA and ViewControllerB. ViewControllerA has a blue background ViewControllerB..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud any insight into the caching algorithm please post it here. iphone caching uikit uiimageview imagenamed share improve this question tldr ImagedNamed is fine. It handles memory well. Use it and stop worrying. Edit Nov 2012 Note that this question dates from iOS 1.0 Image requirements and handling handling have moved..
How do I wrap text in a UITableViewCell without a custom cell http://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell do I wrap text in a UITableViewCell without a custom cell This is on iPhone 0S 2.0. Answers for 2.1 are fine too though I am unaware of any differences regarding tables. It feels like it should be possible to get text to wrap without..
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview I am using and I want to use the image property to display the point on the map with my own icon. I have this working fine. But what I would also like to do is to override the default callout view the bubble that shows up with the title subtitle..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone see anything unless you flag an app as allowing users to modify documents so if you are using Documents today you are fine as long as you change location when updating for support of user documents. Last there is a cache directory where you can.. to do this instead you have to have a UIImage in memory and use the UIImageWriteToSavedPhotosAlbum function call defined by UIKit. You have no control over the destination format or compression levels and cannot attach any EXIF in this way...
Programmatically get own phone number in iOS http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios system. This restriction is part of the security feature known as the application's sandbox. The sandbox is a set of fine grained controls limiting an application's access to files preferences network resources hardware and so on. The device's..
http://stackoverflow.com/questions/3372333/ipad-keyboard-will-not-dismiss-if-modal-view-controller-presentation-style-is-ui UIModalPresentationFormSheet The keyboard refuses to be dismissed. If I comment out this line the keyboard goes away fine. ... I've got two textFields username and password username has a Next button and password has a Done button. The keyboard..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework around that frequency. So as you can see it wouldn't be a very great pitch detector as it doesn't have nearly fine enough granularity. There is a cunning trick Extracting precise frequencies from FFT Bins using phase change between frames..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display to capture UIView to UIImage without loss of quality on retina display My code works fine for normal devices but creates blurry images on retina devices. Does anybody know a solution for my issue UIImage imageWithView..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file it path CFStringCreateWithCString NULL filename kCFStringEncodingUTF8 Create a CFURL using the CFString we just defined url CFURLCreateWithFileSystemPath NULL path kCFURLPOSIXPathStyle 0 CFRelease path This dictionary contains extra options.. kCGPDFContextCreator CFSTR My Name Create our PDF Context with the CFURL the CGRect we provide and the above defined dictionary pdfContext CGPDFContextCreateWithURL url pageRect myDictionary Cleanup our mess CFRelease myDictionary CFRelease.. this Error can't get CIDs for glyphs for 'TimesNewRomanPSMT' The tricky aspect is that the resulting PDF will render fine in some PDF readers but fail to render in other places. So if you have control over the software that will be used to open..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller as the main controller with each of the tabs containing..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour this breaks some aspects of scroll view behaviour on certain phones I'm testing on the 3GS and simulator seem to work fine while the iPhone4 and the 3G don't . Does anyone know how I could get around this clash between the CADisplayLink and the..
http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet static analysis instance variables share improve this question Is never used should be taken literally you only define its value in assignments never use it. This is the same kind of warning you get for local variables if you only define their.. its value in assignments never use it. This is the same kind of warning you get for local variables if you only define their values and never use it what are they for The static analyzer is thus warning you because typically variables that..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application In case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature alloc init fmt setDateFormat @ yyyyMMddHHmmss NSString dateStr fmt stringFromDate someDate fmt release Then it works fine in the US and most locales UNTIL ... someone with their phone set to a 24 hour region sets the 12 24 hour switch in settings..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown objects as id and you're not importing all headers. You could end up with crashes in code that the compiler thinks is fine. This is very rare but could happen. Usually you'll just get a warning that it doesn't know which of two method signatures..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample iCloud When I launch my app see code below I check if the user has iCloud enabled. If iCloud is enabled everything is fine. The app goes ahead and looks for text.txt in the cloud. If found it will load it and display it to the user. If text.txt..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud please post it here. iphone caching uikit uiimageview imagenamed share improve this question tldr ImagedNamed is fine. It handles memory well. Use it and stop worrying. Edit Nov 2012 Note that this question dates from iOS 1.0 Image requirements..
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