“ARC is available in Xcode 4.2, currently in beta, and only when compiling with Clang (a.k.a. “Apple LLVM compiler”). The setting is called, obviously enough, “Objective-C Automatic Reference Counting”. Turn it on, and off you go. If you’re working on existing code, changing this setting will produce an enormous quantity of errors. ARC not only … Read more
Calling pushViewController before viewDidAppear is unsafe.
You use it when you want to execute a block and wait for the results. One example of this is the pattern where you’re using a dispatch queue instead of locks for synchronization. For example, assume you have a shared NSMutableArray a, with access mediated by dispatch queue q. A background thread might be appending … Read more
I was able to recover from this by unplugging the iPad, powering it down and back up, clearing all XCode caches and targets, and doing a clean build. I’m running XCode 3.5.4 and iOS 4.2.1 UPDATE: Same problem running Xcode 4.3 and iOS5 – just power-cycle the device.
If you don’t need any data inbetween drag, than you should simply set: [mySlider setContinuous: NO]; This way you will receive valueChanged event only when the user stops moving the slider. Swift 5 version: mySlider.isContinuous = false
These solutions are way too difficult. The problem is that you have removed the project from filesystem but SVN still thinks they are there. Detaching project from SVN will work, the same for removing .svn folders BUT that is going to destroy your repository! It is much easier to open console, browse to your folder … Read more
Solved. The trick: use fileURLWithPath:, not URLWithString:. Apparently the difference is really, really significant.
Problem is solved. In short, to enable remote control event, 1) use : – (void)remoteControlReceivedWithEvent:(UIEvent *)theEvent and 2) put this is your view controller : – (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; [self becomeFirstResponder]; } – (BOOL)canBecomeFirstResponder { return YES; } I have to give credit to Grant. He has forked Matt Gallagher’s AudioStreamer … Read more
You need to divide by 255.0 Because I hardly ever use values between 1.0 and 0.0, I created a very simple UIColor category that does the messy looking division by itself: (from http://github.com/Jon889/JPGeneral) //.h file @interface UIColor (JPExtras) + (UIColor *)colorWithR:(CGFloat)red G:(CGFloat)green B:(CGFloat)blue A:(CGFloat)alpha; @end //.m file @implementation UIColor (JPExtras) + (UIColor *)colorWithR:(CGFloat)red G:(CGFloat)green B:(CGFloat)blue … Read more
Short answer: No. Long answer: Nothing in UIKit is guaranteed to be KVO-compliant. If you happen to find that KVO-ing a property works, be grateful, it’s unintentional. Also: be wary. It could very well break in the future. If you find that this is something you need, please file an enhancement request. About your actual … Read more