iostimer循环，每X分钟执行一个动作

I am trying to execute a certain block of code every x amount of time, but it seems that all I am doing is executing it during that time. Here's a block of my code.

我正在尝试每x次执行一个特定的代码块，但是看起来我所做的就是在这段时间内执行它。这是我的代码块。

while (TRUE) {
    NSTimer *countDown = [NSTimer
                       scheduledTimerWithTimeInterval:(x)
                       target:self
                       selector:@selector(timerHandle)
                       userInfo:nil
                       repeats:YES];

}

Any ideas as to how to do it?

有什么办法吗?

2 个解决方案

#1

As written, this is an infinite loop, creating an NSTimer every loop iteration.

如前所述，这是一个无限循环，每次循环都创建一个NSTimer。

Try it without the while loop. This should cause [self timerHandle] to be invoked on interval x by a single background thread/timer. The Apple guide to NSTimer usage (including as others point out, how to properly stop your timed task) is here.

尝试它没有while循环。这应该会导致(self timerHandle)在interval x上被单个后台线程/计时器调用。NSTimer使用的苹果指南(包括其他人指出的，如何正确地停止计时任务)在这里。

#2

Try this: (It will call executeMethod on every 5 sec)

试试这个:(它会每5秒调用一个executeMethod)

if (![NSThread isMainThread]) {

    dispatch_async(dispatch_get_main_queue(), ^{
        [NSTimer scheduledTimerWithTimeInterval:5.0
                                         target:self
                                       selector:@selector(executeMethod)
                                       userInfo:nil
                                        repeats:YES];
    });
}
else{
    [NSTimer scheduledTimerWithTimeInterval:5.0
                                     target:self
                                   selector:@selector(executeMethod)
                                   userInfo:nil
                                    repeats:YES];
}

Write the code you want to be executed in executeMethod method. Hope this helps.. :)

编写希望在executeMethod方法中执行的代码。希望这可以帮助. .:)

#1