示例图如下
02..gif
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithRed:35 / 255.0 green:39 / 255.0 blue:63 / 255.0 alpha:1];
//设置中间点击按钮
UIButton *btn = [[UIButton alloc] init];
[btn setImage:[UIImage imageNamed:@"zhifubao"] forState:UIControlStateNormal];
[btn sizeToFit];
btn.center = self.view.center;
[self.view addSubview:btn];
[btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)btnClick:(UIButton *)btn {
for (NSInteger i = 0; i < 10; i++) {
// 1.创建一个圆圈view
UIView *circleView = [[UIView alloc] init];
circleView.backgroundColor = [UIColor colorWithRed:0 green:170 / 255.0 blue:238 / 255.0 alpha:1];
circleView.frame = btn.frame;
// [self.view addSubview:circleView];
// 把圆圈添加到控制器的view上并且加上支付宝按钮的上面
// [self.view insertSubview:circleView aboveSubview:btn];
// 在支付宝按钮按钮下面插入一个view
[self.view insertSubview:circleView belowSubview:btn];
circleView.layer.cornerRadius = circleView.frame.size.width * 0.5;
circleView.layer.masksToBounds = YES;
// 让每一个圆圈延迟时间不一样
[UIView animateWithDuration:1.0 delay:i * 0.2 options:0 animations:^{
circleView.transform = CGAffineTransformMakeScale(16, 16);
circleView.alpha = 0;
} completion:^(BOOL finished) {
[circleView removeFromSuperview];
}];
}
}
代码没什么难度，思路很重要。
