objective-c-blocks

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ARC: Getting EXC_BAD_ACCESS from inside block used in delegate method

I must be doing something wrong, 开发者_C百科but the Automatic Reference Counting docs don\'t give me a hint on what it might be. What I\'m doing is calling a method with a block callback from inside[详细]

2023-04-04 09:14 分类：问答
Objective-C completion block causing extra method call?

Here\'s a weird one.My application sends a shutdown message to an object controlling a hardware device, with a completion block as an argument.The shutdown message returns a BOOL, depending on whether[详细]

2023-04-04 07:19 分类：问答
Objective-C dispatch method with block that will run on the *caller* thread

I write a black box class that does heavy processing in the background using Grand Central Dispatch. I intend to provide a continuation style API, something like:[详细]

2023-04-04 06:06 分类：问答
Can an Obj-C Block execute itself?

This is an extension of this queston: Is it possible to create a category of the "Block" object in Objective-C.[详细]

2023-04-03 03:32 分类：问答
How is the "__block" keyword in Objective-c used?

Just noticed the __block keyword 开发者_Go百科in some Objective-c code like the following: // myString passed into the method[详细]

2023-04-03 02:12 分类：问答
Why does CCMenuItemImage with blocks trigger the wrong block on touch?

Touching my _f开发者_Python百科ollow button, the ^ block for the _learn button is triggered. It looks as if it is firing the wrong block because it is an anonymous or unnamed block. I tried to name it[详细]

2023-04-02 09:01 分类：问答
Call inline block specifying return Type and Parameters

I\'ve decided to try to use blocks for control flow in Objective-C and am running into some issues with calling multiple blocks inline.[详细]

2023-04-02 08:30 分类：问答
If you define an Objective C block within a block within a function, what scope does the inner block have access to?

If one def开发者_JAVA技巧ines a block within a block within a function, what scope does the inner block have access to.[详细]

2023-04-02 05:24 分类：问答
Can I wrap NSLog in a block that takes a variable number of arguments?

I’m writing an Objective-C library and I’d like it to offer a simple pluggable logging mechanism, so that the library use开发者_如何学Pythonr can turn the logging on and off. I thought an interestin[详细]

2023-04-01 03:26 分类：问答
How can I sequence asynchronous background tasks with GCD?

I am using GCD on iOS to perform a a time-consuming task on a background thread. The API has a start method that takes two blocks as arguments, both called on the main queue. The first is called when[详细]

2023-03-31 14:30 分类：问答