iOS開發 倒計時

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[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES];

 

- (void)timerFireMethod:(NSTimer*)theTimer{        id obj = [theTimer userInfo];    NSDateFormatter *f1 = [[NSDateFormatter alloc] init];    [f1 setDateFormat:@"yyyy-MM-dd HH:mm:ss"];        NSDate *theDay = [f1 dateFromString:(NSString*)obj];//    [f1 release];        NSCalendar *cal = [NSCalendar currentCalendar];//定義一個NSCalendar對象        NSDate *today = [NSDate date];//得到目前時間        //用來得到具體的時差    unsigned int unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;    NSDateComponents *d = [cal components:unitFlags fromDate:today toDate:theDay options:0];        NSString *countdown = [NSString stringWithFormat:@"%d年%d月%d日%d時%d分%d秒", [d year],[d month],[d day], [d hour], [d minute], [d second]];    NSLog(@"countDowm== %@",countdown);    //    self.timeLabel.text = countdown;        }

 

iOS開發 倒計時