2014/10/15 下午 10:04:53

iphone Programming Glossary: cancellation

NSThread vs. NSOperationQueue vs. ??? on the iPhone

http://stackoverflow.com/questions/3041837/nsthread-vs-nsoperationqueue-vs-on-the-iphone

images is probably overkill and somewhat inefficient. You may want to cancel the cacheImage operation. Implementing cancellation is easier with NSOperationQueue most the work is already done for you. NSOperationQueue is free to switch to a smarter implementation..

Basic description on how to record video in iOs 4

http://stackoverflow.com/questions/3173822/basic-description-on-how-to-record-video-in-ios-4

a photo NSLog @ movie captured @ info void imagePickerControllerDidCancel UIImagePickerController picker process the cancellation of movie picker here NSLog @ Capture cancelled Super easy. For more details see the Multimedia Programming Guide About Audio..

iOS App Architecture with NSOperations

http://stackoverflow.com/questions/3856598/ios-app-architecture-with-nsoperations

not retain the listener s notified objects but the listeners retain the operation. if the relation is 1 1 then allow cancellation. another major consideration is to define threading early on. allow clients to define which thread they want to receive..

Subclassing NSOperation to be concurrent and cancellable

http://stackoverflow.com/questions/3859631/subclassing-nsoperation-to-be-concurrent-and-cancellable

I am unable to find good documentation about how to subclass NSOperation to be concurrent and also to support cancellation. I read the Apple docs but I am unable to find an official example. Here is my source code @synthesize isExecuting _isExecuting..

Does Facebook class of iPhone Facebook SDK have cancel method?

http://stackoverflow.com/questions/4751982/does-facebook-class-of-iphone-facebook-sdk-have-cancel-method

be deallocated before the FBRequest is completed. Update A possible workaround is suggested in this question to allow cancellation of pending FBRequests. Update 2 To avoid a crash in the case where the delegate gets deallocated before the FBRequest finishes..

Any (early) experiences with auto-renewable subscriptions for iOS

http://stackoverflow.com/questions/5017731/any-early-experiences-with-auto-renewable-subscriptions-for-ios

be managed by the user and auto renewal may be turned off by going to the user 䏭 Account Settings after purchase No cancellation of the current subscription is allowed during active subscription period Links to Your Privacy Policy and Terms of Use Any..

How to get UILocalNotification cancellation event?

http://stackoverflow.com/questions/5274260/how-to-get-uilocalnotification-cancellation-event

to get UILocalNotification cancellation event I am showing a local notification when an event occurs.If user select View details of UIlocalNotification we can..

Can you use cancel/isCancelled with GCD/dispatch_async?

http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async

ios nsoperation grand central dispatch share improve this question GCD does not have built in support for cancellation if it's important to be able to cancel your background task then checking a flag like you've demonstrated is an acceptable.. checking a flag like you've demonstrated is an acceptable solution. However you may want to evaluate how quickly the cancellation needs to respond if some of those methods calls are fairly short you may be able to get away with checking less frequently... be able to get away with checking less frequently. You asked whether you could use the NSOperation flags to support cancellation. The answer is no. GCD is not based on NSOperation. In fact in Snow Leopard NSOperation and NSOperationQueue were re implemented..