[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES]; [NSTimer scheduledTimerWithTimeInterval:1.0 tar
阅读背景：
NSTimer倒计时
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[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES]; [NSTimer scheduledTimerWithTimeInterval:1.0 tar
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