问题描述
我想做的是从远程服务器加载人员列表(JSON格式)，将文件保存到磁盘上，然后解析结果并将NSArray *返回给调用者.
What I am trying to do is load a list of people (JSON format) from a remote server, save the file onto disk, and then parse the result and return an NSArray * back to the caller.
我创建了一个具有以下内容的EmployeeDirectoryManager:
I have created a EmployeeDirectoryManager that has the following:
- (NSArray *)loadDirectory:(BOOL)refreshFromServer;
- (void)loadDirectoryFromFile;
- (void)loadDirectoryFromServer;
我想在loadDirectory方法上使用一个块，以便在loadDirectoryFromServer(正在使用带有success块的AFJSONRequestOperation)时通知调用者.
I would like to use a block on the loadDirectory method so the caller can be informed when the loadDirectoryFromServer, which is using an AFJSONRequestOperation which has a success block on it.
关于如何实现这一目标，或者如果我走错了路，我需要一些指导.
I need a little direction on how to implement this, or if I am headed down the wrong path.
推荐答案
要将方法中的块用作完成处理程序，首先需要定义新类型
To use block in your methods as completion handler, firstly you need define new type
typedef void(^TypeComplitionHandler)(id result)
然后，您可以将块传递给您的方法.例如
Then you can pass block to your method. For example
- (void)loadDirectoryFromFileComplitionHandler:(TypeComplitionHandler)complition {
complition(@"done");
}
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