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2014/10/15 ¤U¤È 10:07:55
iphone Programming Glossary: edhttp://stackoverflow.com/questions/1021801/cgpathref-intersection intersection Is there a way to find out whether two CGPathRefs are intersected or not. In my case all the CGPaths are having closePath. For example I am having two paths. One path is the rectangle which.. case all the CGPaths are having closePath. For example I am having two paths. One path is the rectangle which is rotated with some angle and the other path is curved path. Two paths origin will be changing frequently. At some point they may.. example I am having two paths. One path is the rectangle which is rotated with some angle and the other path is curved path. Two paths origin will be changing frequently. At some point they may intersect. I want to know when they are intersected...
Avoid main thread freezes when UIWebView tries to blockingly lock the web thread http://stackoverflow.com/questions/1431594/avoid-main-thread-freezes-when-uiwebview-tries-to-blockingly-lock-the-web-thread UIWebView tries to blockingly lock the web thread All UIWebViews share a single web thread. When one of them is init ed removed from superview etc. they will attempt to lock the web thread from the main thread in a blocking fashion thus temporarily.. tries to blockingly lock the web thread All UIWebViews share a single web thread. When one of them is init ed removed from superview etc. they will attempt to lock the web thread from the main thread in a blocking fashion thus temporarily.. XMLHttpRequest.open 'GET' url false possibly others Also avoid calling methods that lock the web thread and then immediately doing something that takes a long time as the web thread is only unlocked once control is returned to the run loop...
Skipping the 'CompressResources' build step for XCode iPhone apps http://stackoverflow.com/questions/177160/skipping-the-compressresources-build-step-for-xcode-iphone-apps .png files many of which don't survive the experience in a form which my app can read. Edit the version of pngcrush used creates png files which contain a non standard 'mandatory private' chunk which explicitly prevents decoding. I've modified.. png files which contain a non standard 'mandatory private' chunk which explicitly prevents decoding. I've modified my png reader to handle these files but I'd still like a per project method of skipping this step. One of the other side.. One of the other side effects of pngcrush is that it doesn't save the colour value of transparent pixels so alpha ed textures show fringing at smaller mip levels. The iphone png format is described here http modmyi.com wiki index.php Iphone_PNG_images..
http://stackoverflow.com/questions/2078016/iphone-memory-management is that if I release the variables the app will crash. Code from viewDidLoad is below Set the background image based on the phone's preferred language NSString language NSLocale preferredLanguages objectAtIndex 0 NSString backgroundImageName.. the variables the app will crash. Code from viewDidLoad is below Set the background image based on the phone's preferred language NSString language NSLocale preferredLanguages objectAtIndex 0 NSString backgroundImageName NSString alloc init.. is below Set the background image based on the phone's preferred language NSString language NSLocale preferredLanguages objectAtIndex 0 NSString backgroundImageName NSString alloc init backgroundImageName NSString stringWithFormat..
http://stackoverflow.com/questions/2776494/autorelease-vs-release alloc initWithTitle @ Login style UIBarButtonItemStylePlain target self action @selector loginButtonClicked autorelease self.navigationItem.rightBarButtonItem loginButton or Release loginButton UIBarButtonItem alloc initWithTitle.. alloc initWithTitle @ Login style UIBarButtonItemStylePlain target self action @selector loginButtonClicked self.navigationItem.rightBarButtonItem loginButton loginButton release iphone objective c cocoa touch memory management.. in a loop here releasing now vs. autoreleasing later will have exactly the same effect since another object has retained loginButton it won't be dealloc ed . But I should point out that most of my memory leaks are caused by forgetting to add..
Is a synthesized property already alloc/init -ed? http://stackoverflow.com/questions/3488446/is-a-synthesized-property-already-alloc-init-ed a synthesized property already alloc init ed If I have a custom NSObject class called ProgramModel does it get alloc init ed when I @property.. a synthesized property already alloc init ed If I have a custom NSObject class called ProgramModel does it get alloc init ed when I @property and @synthesize it from.. a synthesized property already alloc init ed If I have a custom NSObject class called ProgramModel does it get alloc init ed when I @property and @synthesize it from another class For instance in a ProgramController..
What happens to JavaScript code after app is compiled using Titanium Mobile http://stackoverflow.com/questions/4217551/what-happens-to-javascript-code-after-app-is-compiled-using-titanium-mobile happens to JavaScript code after app is compiled using Titanium Mobile I installed Titanium from appcelerator and built the KitchenSink example application. All works well.. happens to JavaScript code after app is compiled using Titanium Mobile I installed Titanium from appcelerator and built the KitchenSink example application. All works well I'm just wondering where does the.. example application. All works well I'm just wondering where does the javascript code ends up in a built app. I grep ed the Xcode project and also the result application as I found it in Library Application Support iPhone Simulator ....KitchenSink.app..
List / Scan for available WiFis iPhone http://stackoverflow.com/questions/4735426/list-scan-for-available-wifis-iphone available WiFis iPhone I'm searching for a way to present available WiFis in an iPhone App. So far my research resulted in the following Apps that implement ed such a functionality were removed from the AppStore means you can't deploy the App.. a way to present available WiFis in an iPhone App. So far my research resulted in the following Apps that implement ed such a functionality were removed from the AppStore means you can't deploy the App via AppStore which is fine for me Apple.. in an iPhone App. So far my research resulted in the following Apps that implement ed such a functionality were removed from the AppStore means you can't deploy the App via AppStore which is fine for me Apple hides the functionality that is..
Can you use cancel/isCancelled with GCD/dispatch_async? http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async you use cancel isCancelled with GCD dispatch_async I've been wondering can you use cancel cancelAllOperations .isCancelled with a thread you have.. use cancel isCancelled with GCD dispatch_async I've been wondering can you use cancel cancelAllOperations .isCancelled with a thread you have launched with GCD Currently I just use a boolean as a flag to cancel the background process. Let's.. dispatch_async I've been wondering can you use cancel cancelAllOperations .isCancelled with a thread you have launched with GCD Currently I just use a boolean as a flag to cancel the background process. Let's say you want to do a lot of processing..
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 Solution The compiler is warning about this for a reason. It's very rare that this warning should simply be ignored and it's easy to work around. Here's how SEL selector NSSelectorFromString @ someMethod IMP imp _controller methodForSelector.. C runtime methods so you could do this directly with the runtime API as well . These function pointers are called IMP s and are simple typedef ed function pointers id IMP id SEL ... 1 . This may be close to the actual method signature.. you could do this directly with the runtime API as well . These function pointers are called IMP s and are simple typedef ed function pointers id IMP id SEL ... 1 . This may be close to the actual method signature of the method but will not..
http://stackoverflow.com/questions/7361751/c-boost-on-iphone Boost on iPhone I need to use the boost serialization code. I am in the process of testing it on Android using the NDK obviously . Before i decide.. i decide if i really want to use boost serialization code in my projects i would like to know if boost can be compiled and used in iPhone applications. I ask this because compiling boost on Android is not an immediate thing to do so there.. if i really want to use boost serialization code in my projects i would like to know if boost can be compiled and used in iPhone applications. I ask this because compiling boost on Android is not an immediate thing to do so there is the possibility..
CGContextStrokePath not working when zooming and drawing images http://stackoverflow.com/questions/9281220/cgcontextstrokepath-not-working-when-zooming-and-drawing-images not working when zooming and drawing images I'm drawing lines according to touchesMoved method and normally it works fine. But when I zoom into the image and draw the previously drawn lines are both displaced.. method and normally it works fine. But when I zoom into the image and draw the previously drawn lines are both displaced and keep getting more and more blurry ultimately vanishing. I've tried using UIPinchGestureRecognizer and simply increasing.. draw the previously drawn lines are both displaced and keep getting more and more blurry ultimately vanishing. I've tried using UIPinchGestureRecognizer and simply increasing the frame of myImageView for multi touch events only but the problem..
Does UIView's addSubview really retain the view? http://stackoverflow.com/questions/937767/does-uiviews-addsubview-really-retain-the-view view won't show up suggesting to me that addSubview might not actually retain the view as otherwise suggested. Any idea void applicationDidFinishLaunching UIApplication application self.testViewController TestViewController alloc.. alloc initWithRootViewController self.testViewController self.navigationController nav if this line is removed test view won't show up window addSubview nav.view nav release iphone cocoa touch uikit share improve this question.. touch uikit share improve this question This line window addSubview nav.view does NOT add a view to the screen immediately. It is displayed by the OS in some future run loop on a possibly different thread. The actual implementation we can't..
Looking for a way to encode mp3 on iPhone http://stackoverflow.com/questions/1005598/looking-for-a-way-to-encode-mp3-on-iphone discovered an iPhone app called AudioBoo that records in mp3 so I know it can be done Thanks in advance for any leads. Ed iphone audio mp3 recording share improve this question Beware with using LAME LAME's GPL licensed so its use is only..
How to decrypt an encrypted Apple iTunes iPhone backup? http://stackoverflow.com/questions/1498342/how-to-decrypt-an-encrypted-apple-itunes-iphone-backup enter it in hex Passwords Service Account Data Access group Protection class AirPort Ed ™s Coffee Shop 3FrenchRoast apple AfterFirstUnlock ... An important warning obviously decrypting your iOS device ™s backup..
Using MKAnnotationView without MKMapView? http://stackoverflow.com/questions/1619245/using-mkannotationview-without-mkmapview show. iphone mkmapview mkpinannotationview share improve this question To anyone interested I ported the code of Ed Anuff to Objective C. The source is complete with an Example. You can download it here . Maybe Ed can check it I hope I..
Fixed labels in the selection bar of a UIPickerView http://stackoverflow.com/questions/367471/fixed-labels-in-the-selection-bar-of-a-uipickerview help with that. A suggestion was to add a UILabel as a subview of the picker but that didn't work. Answer I followed Ed Marty's advice answer below and it works Not perfect but it should fool people. For reference here's my implementation feel..
iPhone Disabling UIActionSheet buttons http://stackoverflow.com/questions/743636/iphone-disabling-uiactionsheet-buttons setEnabled view performSelector @selector setEnabled withObject NO Hope that helps someone else although I'd echo Ed Marty's question of whether you'd be better off just omitting these buttons from the action sheet altogether instead of..
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