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利用旋转实现时钟(IOS)
利用旋转实现时钟(IOS)
by 伍雪颖
- (void)viewDidLoad {
[superviewDidLoad];
self.secondHand.layer.anchorPoint = CGPointMake(.5,.9);
self.minuteHand.layer.anchorPoint = CGPointMake(.5,.9);
self.hourHand.layer.anchorPoint = CGPointMake(.5,.9);
self.timer = [NSTimerscheduledTimerWithTimeInterval:1.0target:selfselector:@selector(tick)userInfo:nilrepeats:YES];
[selftick];
}
- (void)tick {
NSCalendar *calendar = [[NSCalendaralloc]initWithCalendarIdentifier:NSGregorianCalendar];
NSUInteger units =NSHourCalendarUnit |NSMinuteCalendarUnit |NSSecondCalendarUnit;
NSDateComponents *components = [calendarcomponents:unitsfromDate:[NSDatedate]];
CGFloat hoursAngle = (components.hour /12.0) *M_PI *2.0;
CGFloat minsAngle = (components.minute /60.0) *M_PI *2.0;
CGFloat secsAngle = (components.second /60.0) *M_PI *2.0;
self.hourHand.transform = CGAffineTransformMakeRotation(hoursAngle);
self.minuteHand.transform = CGAffineTransformMakeRotation(minsAngle);
self.secondHand.transform = CGAffineTransformMakeRotation(secsAngle);
[superviewDidLoad];
self.secondHand.layer.anchorPoint = CGPointMake(.5,.9);
self.minuteHand.layer.anchorPoint = CGPointMake(.5,.9);
self.hourHand.layer.anchorPoint = CGPointMake(.5,.9);
self.timer = [NSTimerscheduledTimerWithTimeInterval:1.0target:selfselector:@selector(tick)userInfo:nilrepeats:YES];
[selftick];
}
- (void)tick {
NSCalendar *calendar = [[NSCalendaralloc]initWithCalendarIdentifier:NSGregorianCalendar];
NSUInteger units =NSHourCalendarUnit |NSMinuteCalendarUnit |NSSecondCalendarUnit;
NSDateComponents *components = [calendarcomponents:unitsfromDate:[NSDatedate]];
CGFloat hoursAngle = (components.hour /12.0) *M_PI *2.0;
CGFloat minsAngle = (components.minute /60.0) *M_PI *2.0;
CGFloat secsAngle = (components.second /60.0) *M_PI *2.0;
self.hourHand.transform = CGAffineTransformMakeRotation(hoursAngle);
self.minuteHand.transform = CGAffineTransformMakeRotation(minsAngle);
self.secondHand.transform = CGAffineTransformMakeRotation(secsAngle);
}
利用旋转实现时钟(IOS)
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