ios - 延长 dispatch_after 的调度时间

Question

我在方法中有以下代码:

int64_t delayInSeconds = 2.0f;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);

dispatch_after(popTime, dispatch_get_main_queue(), ^(void) {
    // Do some stuff
}

如果在 delayInSeconds 启动之前调用该方法，我想将计时器再延长两秒。然后执行 block 。我怎样才能做到这一点？

Answer 1

那么我建议不要为此使用 gcd。相反，您可以尝试:

[self performSelector:@selector(anyMethod) withObject:nil afterDelay:yourDelay]

//Then if you need to cancel just do:

[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(anyMethod) object:nil]

//And simply reschedule your timer here.