mirror of
https://github.com/NohamR/knowledge-kit.git
synced 2026-05-25 04:17:17 +00:00
66 lines
2.0 KiB
Markdown
66 lines
2.0 KiB
Markdown
# 仿微博弹簧动画
|
||
|
||
> 老玩微博，最近在研究动画，周末抽空写了个发微博的动画
|
||
|
||
|
||
|
||
# 实现步骤
|
||
|
||
- 首先模打出一个控制器
|
||
- 这个控制器用来显示多个按钮。（按钮是图文上下排列的，所以我们需要自定义按钮的布局样式）
|
||
- 动画思路：先在界面添加好几个 UIButton，之后给每个 button 添加**y**方向的平移动画 -> 设置一个定时器，每次执行的时候依次取出按钮，将按钮添加一个弹簧动画（**usingSpringWithDamping **）将形变动画恢复原位
|
||
- 给按钮添加2种事件（按下的事件、点击后抬起的事件）
|
||
|
||
## 关键代码
|
||
|
||
```
|
||
//开始时让所有按钮都移动到最底部
|
||
btn.transform = CGAffineTransformMakeTranslation(0, self.view.bounds.size.height);
|
||
|
||
//添加定时器
|
||
self.timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(update) userInfo:nil repeats:YES];
|
||
|
||
- (void)update{
|
||
if (self.btnIndex == self.btnArray.count) {
|
||
[self.timer invalidate];
|
||
return ;
|
||
}
|
||
|
||
VerticalStyleButton *button = self.btnArray[self.btnIndex];
|
||
//弹簧动画
|
||
[UIView animateWithDuration:0.3 delay:0.2 usingSpringWithDamping:0.8 initialSpringVelocity:0 options:UIViewAnimationOptionCurveLinear animations:^{
|
||
button.transform = CGAffineTransformIdentity;
|
||
} completion:^(BOOL finished) {
|
||
|
||
}];
|
||
self.btnIndex++;
|
||
}
|
||
|
||
- (void)btnClick:(UIButton *)button{
|
||
[UIView animateWithDuration:0.25 animations:^{
|
||
button.transform = CGAffineTransformMakeScale(1.2, 1.2);
|
||
}];
|
||
}
|
||
|
||
- (void)btnClick1:(UIButton *)button{
|
||
[UIView animateWithDuration:0.25 animations:^{
|
||
button.alpha = 0;
|
||
button.transform = CGAffineTransformMakeScale(2, 2);
|
||
}];
|
||
}
|
||
```
|
||
|
||
|
||
|
||
# 效果图
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
[源码地址](https://github.com/FantasticLBP/BlogDemos/tree/master/微博发帖动画)
|
||
|