iOS之动画(transform和UIView动画)学习

1、transform 形变

这个是UIView的属性,继承UIView的控件都具有这个属性

UIImageView *imageview=[[UIImageView alloc]init];

imageview.image=[UIImage imageNamed:@"logo.png"];

//旋转

imageview.transform=CGAffineTransformRotate(imageview.transform, 45);

//位置移动

imageview.transform=CGAffineTransformTranslate(imageview.transform, 0, 10);

//缩放

imageview.transform=CGAffineTransformScale(imageview.transform, 1.5, 1.5);

//还原

imageview.transform=CGAffineTransformIdentity;

[self.view addSubview:imageview];

![image](https://img.haomeiwen.com/i6656945/5531cf3c2a9c385b.gif?imageMogr2/auto-orient/strip)

2、UIView渐变动画

[UIView beginAnimations:@"" context:@""];

[UIView setAnimationDuration:2];

[UIView setAnimationDelegate:self];

[UIView setAnimationCurve:UIViewAnimationCurveLinear];

//监听动画开始事件

[UIView setAnimationWillStartSelector:@selector(animationDidStart:)];

//监听动画结束事件

[UIView setAnimationDidStopSelector:@selector(setAnimationDidStopSelector:)];

• (void)animationDidStart:(CAAnimation *)theAnimation {

}

• (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag {

}

//开启一个线程，处理动画相关的操作

[UIView animateWithDuration:1.0 animations:^{

    } completion:^(BOOL finished) {

    }];

//开启一个线程，处理动画相关的操作。

动画伴随着速率的变化

/* UIViewAnimationOptionCurveEaseInOut 动画开始/结束比较缓慢,中间相对较快

UIViewAnimationOptionCurveEaseIn 动画开始比较缓慢

UIViewAnimationOptionCurveEaseOut 动画结束比较缓慢

UIViewAnimationOptionCurveLinear 线性---> 匀速 */

[UIView animateWithDuration:1.0 delay:0 options:UIViewAnimationOptionCurveEaseIn|UIViewAnimationOptionTransitionCurlDown animations:^{

    } completion:^(BOOL finished) {

//动画完成后 要执行什么操作

    }];

//弹性动画

[UIView animateWithDuration:1.0 delay:0 usingSpringWithDamping:0.3 initialSpringVelocity:200 options:UIViewAnimationOptionTransitionCurlDown animations:^{

    } completion:^(BOOL finished) {

    }];

image