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2014/10/15 ¤U¤Č 10:09:56
iphone Programming Glossary: guaranteesSubclassing NSOperation to be concurrent and cancellable http://stackoverflow.com/questions/3859631/subclassing-nsoperation-to-be-concurrent-and-cancellable checking your own _isCancelled instance variable to determine whether the operation has been cancelled. NSOperation guarantees that self isCancelled will return YES if the operation has been cancelled. It does not guarantee that your custom setter..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd the main queue Grand central dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may be after one block is processed it may be after hundreds but probably won't be.. the memory management for those objects. Although GCD dispatch queues have their own autorelease pools they make no guarantees as to when those pools are drained. If your application is memory constrained creating your own autorelease pool allows..
Programatically get own Phone Number in iPhone OS 4.0 http://stackoverflow.com/questions/4544803/programatically-get-own-phone-number-in-iphone-os-4-0
When to access property with self and when not to? http://stackoverflow.com/questions/4884231/when-to-access-property-with-self-and-when-not-to an actual viable value an autoreleased object most likely will be returned to the caller in A. In nonatomic no such guarantees are made. Thus nonatomic is considerably faster than atomic. Edit so if you have some variable that is accessed from different..
What are the Dangers of Method Swizzling in Objective C? http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c things. If you swizzle in load and you only make changes to the class being loaded you'll be safe. The load method guarantees that the super class load method will be called before any subclasses. We'll get the exact right order Difficult to understand..
CoreAudio AudioTimeStamp.mHostTime clock frequency? http://stackoverflow.com/questions/675626/coreaudio-audiotimestamp-mhosttime-clock-frequency You can calculate the conversion factors for either conversion in the void initialize method of the class. Cocoa guarantees that this method is for sure automatically executed before any message is ever sent to this class it is for sure only executed..
http://stackoverflow.com/questions/7761074/arc-blocks-and-retain-cycles listed above iphone ios ios5 automatic ref counting afnetworking share improve this question Assuming progress guarantees a retain cycle might be exactly what you want. You explicitly break the retain cycle at the end of the block so it's not..
How to program a real-time accurate audio sequencer on the iphone? http://stackoverflow.com/questions/907137/how-to-program-a-real-time-accurate-audio-sequencer-on-the-iphone Best regards Walchy iphone audio core audio timing openal share improve this question NSTimer has absolutely no guarantees on when it fires. It schedules itself for a fire time on the runloop and when the runloop gets around to timers it sees..
NSTimer on device is slower than in simulator http://stackoverflow.com/questions/915410/nstimer-on-device-is-slower-than-in-simulator improve this question NSTimer is the wrong tool for this job. It's not meant to be a real time timer. It has no guarantees on when it will fire and you can miss frames easily. There are a lot of good recommendations for how to develop this kind..
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