ios动画-新浪微博app点击发微博按钮动画的实现

来源：互联网发布：js while sleep 编辑：程序博客网时间：2024/04/29 21:35

ios平台实现动画非常简单,本代码实现方式更是菜鸟级........

思路:

1.点击发微博按钮后,切换控制器,在此控制器中创建6个UI按钮.

2.6个按钮的frame设置成动画结束后所在的位置.

3.为每个按钮添加transform属性,使其一开始出现的位置在屏幕下方.

4.在UIView动画中清空transform属性,注意清空的时间应该依次有一小段时间间隔.

5.transform清空后为每个按钮添加关键帧动画,实现抖动效果

代码:

for (int i = 0; i < count; i ++) {        //创建6个UI控件        int posY = 200;        int row = i / numsProcolumn;        int col = i % numsProcolumn;        CGFloat margin = (self.view.frame.size.width - viewWH*numsProcolumn)/(numsProcolumn+1);        UIImageView *image = [[UIImageView alloc]init];        image.image = [UIImage imageNamed:[ NSString stringWithFormat:@"tabbar_compose_%d",i ]];        image.backgroundColor = [UIColor clearColor];        image.bounds = CGRectMake(0, 0, 50, 50);        image.center = CGPointMake( col * 70, row *70);        image.frame = CGRectMake(margin + (margin+viewWH)*col, posY+(margin+viewWH)*row, viewWH, viewWH);        [self.view addSubview:image];                        //设置初始y方向偏移        CGAffineTransform trans = CGAffineTransformTranslate  (image.transform,  0, (400 + row *viewWH));        image.transform = trans;                //清空偏移量的动画        [UIView animateWithDuration:0.25 delay:i/10.0 options:UIViewAnimationOptionAllowAnimatedContent animations:^{            //清空偏移量            image.transform = CGAffineTransformIdentity;        } completion:^(BOOL finished) {            //抖动动画            CAKeyframeAnimation *shakeAnim = [CAKeyframeAnimation animation];            shakeAnim.keyPath = @"transform.translation.y";            shakeAnim.duration = 0.15;            CGFloat delta = 10;            shakeAnim.values = @[@0, @(-delta), @(delta), @0];            shakeAnim.repeatCount = 1;            [image.layer addAnimation:shakeAnim forKey:nil];                               }];    }

完整代码下载:点击下载

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