Objective C 相当于 javascripts setTimeout? [英] Objective C equivalent to javascripts setTimeout?

问题描述

我想知道是否有解决方案可以在 CocoaTouch ObjectiveC 中在 30 秒或每 30 秒后引发一次事件.

I was wondering whether there is a solution to raise an event once after 30 seconds or every 30 seconds in CocoaTouch ObjectiveC.

推荐答案

有多种选择.

最快的使用在NSObject:

The quickest to use is in NSObject:

- (void)performSelector:(SEL)aSelector withObject:(id)anArgument afterDelay:(NSTimeInterval)delay

(还有一些略有不同.)

(There are a few others with slight variations.)

如果您想要更多的控制权或能够说每三十秒发送一次此消息，您可能需要 NSTimer.

If you want more control or to be able to say send this message every thirty seconds you probably need NSTimer.

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