iOS视图弹跳动画

//动画弹跳效果关键代码

弹跳屡次可自行多嵌套几回   调用此方法  只需传入弹跳对象

- (void)animationShootOut:(UIView *)animationView{

    CGRect frame = animationView.frame;

    [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseIn animations:^(void){

        

    } completion:^(BOOL finished){

        [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseOut animations:^(void){

            //弹起

            animationView.frame = CGRectMake(frame.origin.x, frame.origin.y-20, frame.size.width, frame.size.height);

        } completion:^(BOOL finished){

            [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseIn animations:^(void){

                //降低

                animationView.frame = frame;

            } completion:^(BOOL finished){

                [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseOut animations:^(void){

                    //弹起

                    animationView.frame = CGRectMake(frame.origin.x, frame.origin.y-10, frame.size.width, frame.size.height);

                } completion:^(BOOL finished){

                    //降低

                    [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseOut animations:^(void){

                        animationView.frame = frame;

                    } completion:^(BOOL finished){

                    }];

                }];

            }];

        }];

    }];

}

忽然发现这样太麻烦 要是想多跳几回就要写不少了，因此刚刚又封装了一下    就是感受跳动不流畅  太生硬 暂时没什么思路解决

封装的就是用一个C 函数递归调用   感受还行

//弹射动画函数

void shootOutAnimation(UIView *view ,int n,float height,CGRect frame,int num) {

    //n 为弹跳的次数 若是传入的是一个基数  那么就会自动默认加一为偶数

    //height 为第一次弹跳的最高高度 20

    //view 为传入的视图

    //frame 为传入视图的坐标

    //num 必须和传入的弹跳次数一致 

    if (n<0) {

        return;

    }

    n = n-1;

    [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseIn animations:^(void){

        view.frame = CGRectMake(frame.origin.x, frame.origin.y-((n%2)?0:(n+2)*(height/num)), frame.size.width, frame.size.height);

    } completion:^(BOOL finished){

        shootOutAnimation(view, n, height, frame,num);

    }];

}

今天又发现另一方法  mark

void shakerAnimation (UIView *view ,NSTimeInterval duration,float height){

    CAKeyframeAnimation * animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.translation.y"];

    CGFloat currentTx = view.transform.ty;

    animation.duration = duration;

    animation.values = @[@(currentTx), @(currentTx + height), @(currentTx-height/3*2), @(currentTx + height/3*2), @(currentTx -height/3), @(currentTx + height/3), @(currentTx)];

    animation.keyTimes = @[ @(0), @(0.225), @(0.425), @(0.6), @(0.75), @(0.875), @(1) ];

    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    [view.layer addAnimation:animation forKey:@"kViewShakerAnimationKey"];

}