如何将 NSTimeInterval 对象传递给 detachNewThreadSelector withObject 参数？

发布于 2024-09-06 04:42:04 字数 423 浏览 1 评论 0原文

我对 Objective C 语法仍然很陌生，所以我可能会让这个过于复杂，但我似乎无法弄清楚如何将 NSTimeInterval 传递给线程。

我想启动一个休眠 x 秒的线程，从主线程发送参数如下：

[NSThread detachNewThreadSelector:@selector(StartServerSynchThread) toTarget:self withObject:5];

- (void) StartServerSynchThread:(NSTimeInterval *)sleepSecondsInterval {

    [NSThread sleepForTimeInterval:sleepSecondsInterval];

}

但是编译器一直给我一个语法错误。我不确定具体应该如何做。任何帮助将不胜感激。谢谢！

原文

I'm still new to Objective C syntax, so I might be overcomplicating this, but I can't seem to figure out how to pass an NSTimeInterval to a thread.

I want to initiate a thread that sleeps for x seconds parameter sent from main thread as follows:

[NSThread detachNewThreadSelector:@selector(StartServerSynchThread) toTarget:self withObject:5];

- (void) StartServerSynchThread:(NSTimeInterval *)sleepSecondsInterval {

    [NSThread sleepForTimeInterval:sleepSecondsInterval];

}

But the compiler keeps giving me a syntax error. I'm not sure exactly how it should be done. Any help would be appreciated. Thanks!

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药祭#氼 2024-09-13 04:42:04

这与 @Georg 的答案几乎完全相同，但使用了正确的类型。 :)

如果将 NSTimeInterval 装箱到 NSNumber（NSValue 的子类）中，则可以将其传入：

[NSThread detachNewThreadSelector:@selector(startServerSynchThread:) 
                         toTarget:self 
                       withObject:[NSNumber numberWithDouble:myTimeInterval]];

- (void) startServerSynchThread:(NSNumber *)interval {
  [NSThread sleepForTimeInterval:[interval doubleValue]];
}

This is almost exactly the same as @Georg's answer, but using the proper types. :)

If you box the NSTimeInterval into an NSNumber (a subclass of NSValue), you can pass that in instead:

[NSThread detachNewThreadSelector:@selector(startServerSynchThread:) 
                         toTarget:self 
                       withObject:[NSNumber numberWithDouble:myTimeInterval]];

- (void) startServerSynchThread:(NSNumber *)interval {
  [NSThread sleepForTimeInterval:[interval doubleValue]];
}

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