objective-c-blocks

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Does GCD assure that all the blocks working in the same queue are always working in a same thread?(About ABAddressBookRef)

Does GCD assure that all the blocks working in the same queue are always working in a same thread? If I create a dispatchqueue and dispath_async blocks to this queue, does all the blocks that dispatc[详细]

2023-03-27 04:39 分类：问答
Construct NSInvocation w/ Block argument

I\'m trying to send a Block as an argument to a method called by an NSInvocation (which, for context, is fired by an NSInvocationOperation). The invocation should be retaining the arguments, and it se[详细]

2023-03-22 15:58 分类：问答
Dismiss a UIViewController from bottom to top instead of right to left

I am trying to dismiss a view controller from bottom to top instead of the standard right to left transition. Is this at all开发者_如何学Python possible? Here is the code I have so far:[详细]

2023-03-21 18:46 分类：问答
Strange crash with block and phantom block argument exchange

I\'m totally stumped with this one and hope someone could help me out here: Class A: - (void)setBlock:(BOOL(^)(id sender))block {[详细]

2023-03-21 12:05 分类：问答
Use of Blocks crashes app in iPhone Simulator 4.3/XCode 4.2 and 4.0.2

Anybody else having trouble with the 4.3 iPhone Simulator in XCode 4.2(lion) or 4.0.2? I have code that has long been working, tested, and in production that uses blocks to specify completion action[详细]

2023-03-21 08:42 分类：问答
animateWithDuration not recognised?

I\'m trying to do a cross dissolve on three UILabels (display1, display2, display3), by using a block animation to fade out, change text and t开发者_Python百科hen fade them in one at a time. The code[详细]

2023-03-20 19:24 分类：问答
Why most block use argument for iteration continue flag instead of return value?

For most iteration开发者_开发百科 blocks, signatures are defined sort of: void(^)(id obj, BOOL* stop)[详细]

2023-03-20 15:21 分类：问答
Function that returns a function

How to assign and subsequently call a function that returns a function to a local variable in Objective-C?[详细]

2023-03-20 05:15 分类：问答
Why are Blocks useful when updating a batch of rows in UITableView?

So I am learning about blocks now and as I was watching a WWDC video I saw one of the demos using \"update blocks\" to update a batch of rows in UITableView.[详细]

2023-03-20 03:17 分类：问答
Unable to understand the block's lexical scope

To understand the lexical scope of block, I have write the following code typedef int (^ MyBlock)(void);[详细]

2023-03-19 20:54 分类：问答