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我正在嘗試更新從用戶出生日期到下一個日期計數的UILabel。我試圖更新標籤,以便他們可以看到它倒計時,但似乎無法使其工作。建議表示讚賞!通過計時器不工作更新UILabel
這裏就是我做的計時器:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timeFormatted:) userInfo:nil repeats:NO];
}
,這裏是從哪裏獲得的實際倒計時信息...
- (NSString *)timeFormatted:(int)totalSeconds
{
NSTimeInterval theTimeInterval = [self numberOfSecondsToLive];
NSCalendar *sysCalendar = [NSCalendar currentCalendar];
NSDate *date1 = [[NSDate alloc] init];
NSDate *date2 = [[NSDate alloc] initWithTimeInterval:theTimeInterval sinceDate:date1];
unsigned int unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit | NSSecondCalendarUnit;
NSDateComponents *conversionInfo = [sysCalendar components:unitFlags fromDate:date1 toDate:date2 options:0];
_numberofSeconds.text = [NSString stringWithFormat:@" %dyears:%dMonths:%ddays:%dhour:%dminutes:%dseconds",[conversionInfo year],[conversionInfo month], [conversionInfo day], [conversionInfo hour], [conversionInfo minute], [conversionInfo second]];
[date1 release];
[date2 release];
}
什麼情況是,它並顯示正確的倒計時信息,但它不會更新它。
預先感謝您!
謝謝!我對此很陌生,認爲這會讓我錯過一些簡單的事情。謝謝!! – sixstatesaway 2012-01-17 22:21:50