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2014/10/15 ¤U¤È 10:04:00
iphone Programming Glossary: aselectorhttp://stackoverflow.com/questions/12565400/uipageviewcontroller-in-ios6 specifically naming it and almost certainly earning me an app store review rejection . BOOL respondsToSelector SEL aSelector if super respondsToSelector aSelector return YES else if self.pageViewController respondsToSelector aSelector return YES.. certainly earning me an app store review rejection . BOOL respondsToSelector SEL aSelector if super respondsToSelector aSelector return YES else if self.pageViewController respondsToSelector aSelector return YES else return NO id forwardingTargetForSelector.. SEL aSelector if super respondsToSelector aSelector return YES else if self.pageViewController respondsToSelector aSelector return YES else return NO id forwardingTargetForSelector SEL aSelector if super respondsToSelector aSelector return nil..
How does -performSelector:withObject:afterDelay: work? http://stackoverflow.com/questions/1922517/how-does-performselectorwithobjectafterdelay-work thread using the default mode after a delay. The discussion goes further This method sets up a timer to perform the aSelector message on the current thread ™s run loop. The timer is configured to run in the default mode NSDefaultRunLoopMode . When..
Dismissing UIAlertViews when entering background state http://stackoverflow.com/questions/3105974/dismissing-uialertviews-when-entering-background-state below avoids to re implement all protocol methods to forward to the real delegate. id forwardingTargetForSelector SEL aSelector struct objc_method_description hasMethod protocol_getMethodDescription @protocol UIAlertViewDelegate aSelector NO YES if.. SEL aSelector struct objc_method_description hasMethod protocol_getMethodDescription @protocol UIAlertViewDelegate aSelector NO YES if hasMethod.name NULL The method is that of the UIAlertViewDelegate. if aSelector @selector alertView didDismissWithButtonIndex.. UIAlertViewDelegate aSelector NO YES if hasMethod.name NULL The method is that of the UIAlertViewDelegate. if aSelector @selector alertView didDismissWithButtonIndex aSelector @selector alertView clickedButtonAtIndex NSNotificationCenter..
Repeating NSTimer, weak reference, owning reference or iVar? http://stackoverflow.com/questions/4945028/repeating-nstimer-weak-reference-owning-reference-or-ivar SEL selector for logging purposes BOOL logging NSString targetDescription id initWithTarget id target selector SEL aSelector shouldLog BOOL shouldLogDealloc void passthroughFiredTimer NSTimer aTimer void dumbCallbackTimer NSTimer aTimer @end @implementation.. void dumbCallbackTimer NSTimer aTimer @end @implementation D12WeakTimerTarget id initWithTarget id target selector SEL aSelector shouldLog BOOL shouldLogDealloc self super init if self return nil logging shouldLogDealloc if logging targetDescription.. return nil logging shouldLogDealloc if logging targetDescription target description copy weakTarget target selector aSelector return self void dealloc if logging NSLog @ @ dealloc Target was @ self targetDescription targetDescription release super..
Grand Central Dispatch (GCD) vs. performSelector - need a better explanation http://stackoverflow.com/questions/5225130/grand-central-dispatch-gcd-vs-performselector-need-a-better-explanation on performSelector target withObject order modes the documentation states This method sets up a timer to perform the aSelector message on the current thread ™s run loop at the start of the next run loop iteration. The timer is configured to run in..
When does an associated object get released? http://stackoverflow.com/questions/6039309/when-does-an-associated-object-get-released SEL delegateCallback id initWithObject NSObject anObject keyPath NSString aKeyPath delegate id aDelegate callback SEL aSelector @end ZSPropertyWatcher.m @interface ZSPropertyWatcher @property nonatomic assign NSObject observedObject @property nonatomic.. keyPath id initWithObject NSObject anObject keyPath NSString aKeyPath delegate id aDelegate callback SEL aSelector if anObject aKeyPath pre conditions self nil return self self super init if self observedObject anObject keyPath aKeyPath.. nil return self self super init if self observedObject anObject keyPath aKeyPath delegate aDelegate delegateCallback aSelector observedObject addObserver self forKeyPath keyPath options 0 context nil return self void dealloc observedObject removeObserver..
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