ios在字典或数组中存储^块？ [英] ios store ^block in dictionary or array?

问题描述

我可以将^块存储在字典或数组中吗？

Can I store ^block in a dictionary or an array?

我需要收听服务器通知，我需要提供一个块来处理通知，在我的项目中，几个视图控制器都希望听到通知，所以我创建了一个通用的通知管理器，它有自己的块来处理服务器通知，它有一个委托数组，所以在管理器的块中：

I need to listen to a server notification which I need to provide a block to handle the notification, and in my project several view controllers all want to hear the notification, so I made a generic notification manager, which has its own block for handling server notification and it has an array of delegates, so in the manager's block:

- (^)(NSString *message){
    for (delegate in allDelegates)
    {
        delegate.handlerBlock(message);
    }
}

但是我可以在一个集合中存储块吗？

but can I store blocks in a collection?

推荐答案

您可以将对象存储到集合中。但要注意范围：当它们被排除在功能范围之外时复制它们。这是你的情况，因为你将它们存储在一个数组中。

You can store object into collection. But take care of the scope: Copy them when they will be kept out of a function scope. This is your case since you are storing them in a array.

[NSArray arrayWithObject: 
[[^{ NSLog(@"block 1"); } copy] autorelease],
[[^{ NSLog(@"block 2"); } copy] autorelease], nil]

在ARC上，你仍然需要告诉它你绝对需要复制你的块。它应该在释放数组时释放块。

On ARC, you still need to tell it you absolutely needs to copy your block. It should release the block when the array is freed.

  [NSArray arrayWithObject: 
    [^{ NSLog(@"block 1"); } copy],
    [^{ NSLog(@"block 2"); } copy], nil]

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