从NSOperation返回数据？ [英] Return data from NSOperation?

问题描述

我正在创建大量的 NSOperation s（子类），它们对一堆数据进行排序。当它们完成后，我希望它们返回那些数据并将其放入可变数组或其他内容中。订单无关紧要。

I'm creating a lot of NSOperations (subclasses) that sort through a bunch of data. When they're done, I'd like them "return" that data and put it into a mutable array or something. Order doesn't matter.

这样的事情是可能的吗？

Is something like this is possible?

推荐答案

不确定。在NSOperation子类中声明委托。然后在完成操作后

Sure. Declare a delegate in NSOperation subclass. Then after finish of operation

if([self.delegate respondsToSelector:@selector(YourDelegate:)]) {
    [(NSObject *)self.delegate performSelectorOnMainThread:@selector(YourDelegate:) withObject:self waitUntilDone:NO];
}

在用户界面

-(void)YourOperationDidFinish:(YourOperation *)downloader {
    if(downloader.downloadItem) {
        // processing with your object       
    }
}

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