objective-c-blocks

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Blocks and ViewController Thread Safety

I\'ve been looking at the Game Center code example, GKTapper, and one section where the developer comments on his implementation does not make too much sense to me.The code is inserted below.What I do[详细]

2023-02-22 05:00 分类：问答
Blocks retaining the class they just got passed to?

We have a class that wraps NSURLConnection. It accepts a block that it calls back when it finishes loading. To give you an idea, see below. When you send a request, it saves the callback on the instan[详细]

2023-02-22 03:20 分类：问答
What are alternatives to "delegates" for passing data between controllers?

Are there alternatives to \"delegates\" to pass back data from one controlle开发者_如何转开发r to another?[详细]

2023-02-21 23:52 分类：问答
i'm trying to access a classes ivars from a obj-c block that's defined as part of the class. what don't i understand here?

//class definition @interface class1 : NSObject { NSMutableArray *array ; void (^test)() ; } @property( nonatomic,assign ) NSMutableArray *array;[详细]

2023-02-21 11:22 分类：问答
iOS 4 blocks and retain counts

I\'m just getting started with blocks and Grand Central Dispatch. I\'ve been told (and read in the Apple Documentation) that any object referenced from within a block gets retained.[详细]

2023-02-21 08:42 分类：问答
Objective-C: Calling and copying the same block from multiple threads

I\'m dealing with neural networks here, but it\'s safe to ignore that, as the real question has to deal with blocks in objective-c. Here is my issue. I found a way to convert a neural network into a b[详细]

2023-02-20 20:00 分类：问答
Safe way to update a label from inside a block?

Example: I have this block, and I want to update a label on the screen: [self.motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion开发者_如何学C[详细]

2023-02-20 19:53 分类：问答
Access C Array within blocks (variable array count) Objective-C

Blocks are fine but what about writing C arrays? Given this simplified situation: CGPoint points[10]; [myArray forEachElementWithBlock:^(int idx) {[详细]

2023-02-20 09:38 分类：问答
iPhone - is there any advantage in using animateWithDuration instead of UIView beginAnimations?

One simple question: This is an example of an old fashion animation: [UIView beginAnimations:nil context:NULL];[详细]

2023-02-20 01:24 分类：问答
Asynchronously dispatched recursive blocks

Suppose I run this code: __block int step = 0; __block dispatch_block_t myBlock; myBlock = ^{ if(step == STEPS_COUNT)[详细]

2023-02-18 20:19 分类：问答