我想用秒和毫秒进行简单的倒计时:SS:MM。 但是,我想在计时器到达 0:00 时停止计时器或执行某些操作。 目前计时器正在工作,但不会在 0:00 停止。我可以让秒停止,但不能让毫秒停止。怎么了?
-(void) setTimer {
MySingletonCenter *tmp = [MySingletonCenter sharedSingleton];
tmp.milisecondsCount = 99;
tmp.secondsCount = 2;
tmp.countdownTimerGame = [NSTimer scheduledTimerWithTimeInterval:.01 target:self selector:@selector(timerRun) userInfo:nil repeats:YES];
}
-(void) timerRun {
MySingletonCenter *tmp = [MySingletonCenter sharedSingleton];
tmp.milisecondsCount = tmp.milisecondsCount - 1;
if(tmp.milisecondsCount == 0){
tmp.secondsCount -= 1;
if (tmp.secondsCount == 0){
//Stuff for when the timer reaches 0
//Also, are you sure you want to do [self setTimer] again
//before checking if there are any lives left?
[tmp.countdownTimerGame invalidate];
tmp.countdownTimerGame = nil;
tmp.lives = tmp.lives - 1;
NSString *newLivesOutput = [NSString stringWithFormat:@"%d", tmp.lives];
livesLabel.text = newLivesOutput;
if (tmp.lives == 0) {
[self performSelector:@selector(stopped) withObject:nil];
}
else {[self setTimer]; }
}
else
tmp.milisecondsCount = 99;
}
NSString *timerOutput = [NSString stringWithFormat:@"%2d:%2d", tmp.secondsCount, tmp.milisecondsCount];
timeLabel.text = timerOutput;
}
-(void) stopped {
NSLog(@"Stopped game");
timeLabel.text = @"0:00";
}
最佳答案
嗯。你做
tmp.milisecondsCount = tmp.milisecondsCount - 1;
if(tmp.milisecondsCount == 0){
tmp.milisecondsCount = 100;
tmp.secondsCount -= 1;
}
紧接着
if ((tmp.secondsCount == 0) && tmp.milisecondsCount == 0) {
//stuff
}
如果 milisecond
达到 0
后立即将其重置为 100
,它们怎么可能都为 0?
编辑:改为做类似的事情:
if(tmp.milisecondsCount < 0){
tmp.secondsCount -= 1;
if (tmp.secondsCount == 0){
//Stuff for when the timer reaches 0
//Also, are you sure you want to do [self setTimer] again
//before checking if there are any lives left?
}
else
tmp.milisecondsCount = 99;
}
关于ios - NSTimer 毫秒倒计时,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19050918/