objective-c - NSTimer 的问题

Question

我在使用 NSTimers 时遇到了很多麻烦。我以前用过它们，但这个计时器就是不想触发。

-(void) enqueueRecordingProcess
{
    NSLog(@"made it!");
    NSTimer *time2 = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(warnForRecording) userInfo:nil repeats:YES];

}

-(void) warnForRecording
{
    NSLog(@"timer ticked!");
    if (trv > 0) {
        NSLog(@"Starting Recording in %i seconds.", trv);
    }
}

我不明白为什么这不能运行。我什至尝试过这个:

- (void)enqueueRecordingProcess
{
    NSLog(@"made it!");
    [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(warnForRecording) userInfo:nil repeats:YES];
}

 - (void)warnForRecording
{
    NSLog(@"timer ticked!");
}

出了什么问题？

Answer 1

不确定这是否可以解决问题，但来自 docs :

The message to send to target when the timer fires. The selector must have the following signature:
- (void)timerFireMethod:(NSTimer*)theTimer
The timer passes itself as the argument to this method.