objective-c-blocks

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Assigning values within block with GCD

Im executing a thread that keeps looking for updates from a web site. It should be possible to set the refresh rate in some view.[详细]

2023-03-08 01:25 分类：问答
Do I have to retain blocks in Objective-C for iOS?

I would like to make a method that takes in a block, saves it in a member, starts up an asynch task, and then calls the block when the asynchronous call makes its completi开发者_如何学Pythonon callbac[详细]

2023-03-07 16:18 分类：问答
Memory management with Block programming in Objective C

I was reading the following Apple documentation on completion block in dispatch queues, and I have trouble understanding part of it.The document mentions that "To prevent the queue from being rel[详细]

2023-03-07 07:17 分类：问答
do some work in the background and return the result

I\'m trying to get the ID from a tag, using a library. I came up with the following. the loop that\'s looks for a tag is done in the background and I get a correct result in tagAsString.[详细]

2023-03-06 23:44 分类：问答
Is there a general directly executable type for Objective-C blocks?

开发者_如何学编程I’d like to get rid of the complex type declaration before my one-shot blocks:[详细]

2023-03-06 19:02 分类：问答
How can I force an unused variable to be part of a block?

Considering the following code: - (void)downloadObjectUsingURL: (NSURL *)url; { id file = [self createFileForURL: url];[详细]

2023-03-06 02:25 分类：问答
Strange issue due to block support for iOS 3.1.3

since I am regularly testing my app on a 3.1.3 device, I had to add a linker flag \"-weak_library /usr/lib/libSystem.B.dylib\" to support blocks there. This was no issue until I just started to add so[详细]

2023-03-05 16:47 分类：问答
Using block or NSOperation for loading Image?

I need to know if it\'s better to use NSOperation o开发者_Go百科r Block to load a large number of image into a UIScrollView? I create all the Imageview and positioning each UIImageView in the right po[详细]

2023-03-05 16:03 分类：问答
iPhone : Unable to understand the following coding

I have do开发者_C百科wnloaded some example coding. But I found strange coding or maybe I have seen it first time.[详细]

2023-03-05 00:08 分类：问答
What is the recommended pattern for the following GCD / blocks scenario?

I have a question about Grand Central Dispatch, blocks and memory management. Consider this code: Worker *myWorker = [[Worker alloc] init];[详细]

2023-03-04 13:37 分类：问答