如何创建仅接收一次信号的ReactiveCocoa订阅者，然后取消订阅/释放自身？ [英] How do I create a ReactiveCocoa subscriber that receives a signal only once, then unsubscribes/releases itself?

问题描述

我目前正在向这样的房产信号注册订阅者：

I'm currently registering a subscriber to a property signal like this:

[RACAble(self.test) subscribeNext:^(id x) {
        NSLog(@"signal fired!");
 }];

默认功能是它每次都会触发self.test被更改，但我只想要它一次开火，然后取消订阅。我创建此订阅者时是否可以传递给RAC的一次参数或修饰符？

The default functionality is that it fires every single time self.test is changed, but I just want it to fire once, and then unsubscribe. Is there a "once" argument or modifier I can pass to RAC when I create this subscriber?

推荐答案

[[RACAble(self.test) take:1] subscribeNext:^(id x) {
    NSLog(@"signal fired!");
}];

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