xcode 取消 [self performSelector:... withObject:nil afterDelay:20];
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Cancel [self performSelector:... withObject:nil afterDelay:20];
提问by SajjadZare
I call method sr in viewDidLoad with below code,how can i cancel it before that method sr will call?
我使用以下代码在 viewDidLoad 中调用方法 sr，如何在该方法 sr 调用之前取消它？
[self performSelector:@selector(sr) withObject:nil afterDelay:20];
回答by CIFilter
[NSObject cancelPreviousPerformRequestsWithTarget:self
selector:@selector(sr)
object:nil];
Please read the documentation. :) The documentation for -performSelector:withObject:afterDelay:points you to the methods for canceling a queued perform request.
请阅读文档。:) 文档-performSelector:withObject:afterDelay:指向您取消排队执行请求的方法。
