- (IBAction)big {
// 1.添加阴影
// 1.1创建阴影
UIButton *cover = [[UIButton alloc]initWithFrame:self.view.bounds];
// 1.2添加
[self.view addSubview:cover];
// 1.3设置颜色
cover.backgroundColor = [UIColor blackColor];
// 1.4设置透明度
cover.alpha = 0.0;
self.cover = cover;
// 1.5阴影添加点击事件
[cover addTarget:self action:@selector(smallImage) forControlEvents:UIControlEventTouchUpInside];
// 2.调整阴影和头像的位置
[self.view bringSubviewToFront:self.head];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
cover.alpha = 0.6;
// 3.修改头像的frame
CGFloat headX = 0;
CGFloat headW = self.view.frame.size.width;
CGFloat headH = headW;
CGFloat headY = (self.view.frame.size.height - headH)*0.5;
self.head.frame = CGRectMake(headX, headY, headW, headH);
[UIView commitAnimations];
}
- (void)smallImage{
[UIView animateWithDuration:1.0 animations:^{
// 1.图片缩小
self.head.frame = CGRectMake(123, 177, 120, 120);
self.cover.alpha = 0.0;
} completion:^(BOOL finished) {//动画完成后让阴影消失
// 2.阴影消失
[self.cover removeFromSuperview];
}];
}
- (IBAction)headClick {
if (self.cover == nil) {// 表示没有阴影,变大
[self big];
}else{//有阴影,变小
[self smallImage];
}
}