iOS 模仿系统的抖动动画

来源：互联网发布：用友初始化数据库编辑：程序博客网时间：2024/04/29 09:01

模仿系统的抖动动画，主要用的是CAKeyframeAnimation（见之前篇博文）和NSTimer，不多说直接上代码。

#define degreesToRadians(x) (M_PI*(x)/180.0)//左右摇摆的角度#define RADIUS 3.0f#define ShakeTime 0.5//动画实现-(void)ShakeAnimationWithView:(id)sender{    CAKeyframeAnimation *keyAn = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"];    [keyAn setDuration:ShakeTime];    NSArray *array = [[NSArray alloc] initWithObjects:                      [NSNumber numberWithFloat:degreesToRadians(0.0f)],                      [NSNumber numberWithFloat:degreesToRadians(-RADIUS)],                      [NSNumber numberWithFloat:degreesToRadians(0.0f)],                      [NSNumber numberWithFloat:degreesToRadians(RADIUS)],                      [NSNumber numberWithFloat:degreesToRadians(0.0f)],                      nil];    [keyAn setValues:array];    [array release] ,array = nil;        NSTimer *timer = (NSTimer *)sender;    UIView *shakeView = [viewDic objectForKey:timer.userInfo];        //判断如果是UIIimageView，要进行去除锯齿效果    if ([shakeView isKindOfClass:[UIImageView class]]) {        shakeView = [self clearSawtoothOfView:(UIImageView *)shakeView];    }    [shakeView.layer addAnimation:keyAn forKey:@"shake"];    }

//调用该方法，开始抖动动画-(void)startShakeWithView:(UIView *)shakeView withViewName:(NSString *)nameOfView{    [viewDic setObject:shakeView forKey:nameOfView];    NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:ShakeTime target:self selector:@selector(ShakeAnimationWithView:) userInfo:nameOfView repeats:YES];    [timer fire];    [timerArray addObject:timer];}

//结束所有动画-(void)stopShakeAll{    for (int i = 0; i < [timerArray count]; i++) {        NSTimer *timer = (NSTimer *)[timerArray objectAtIndex:i];        [timer invalidate];        timer = nil;    }    [timerArray removeAllObjects];}

//去除UIImageView的锯齿-(UIImageView *)clearSawtoothOfView:(UIImageView *)imgView{    UIGraphicsBeginImageContextWithOptions(imgView.frame.size, NO, 1);    [imgView.image drawInRect:CGRectMake(0, 0, imgView.frame.size.width, imgView.frame.size.height)];    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();    [imgView setImage:image];    return imgView;}