谈UIView Animation编程艺术

一、大小动画（改变frame）

-(void)changeFrame{
CGRect originalRect = self.anView.frame;
CGRect rect = CGRectMake(self.anView.frame.origin.x-20, self.anView.frame.origin.y-120, 160, 80);
[UIView animateWithDuration:1 animations:^{
self.anView.frame = rect;
} completion:^(BOOL finished) {
[UIView animateWithDuration:1 animations:^{
self.anView.frame = originalRect;
}];
}];
}

二、拉伸动画（改变bounds）

-(void)changeBounds{
CGRect originalBounds = self.anView.bounds;
//尽管这个rect的x，y跟原始的不同，动画也只是改变了宽高
CGRect rect = CGRectMake(0, 0, 300, 120);
[UIView animateWithDuration:1 animations:^{
self.anView.bounds = rect;
} completion:^(BOOL finished) {
[UIView animateWithDuration:1 animations:^{
self.anView.bounds = originalBounds;
}];
}];
}

三、转移动画（改变center）

-(void)changeCenter{
CGPoint originalPoint = self.anView.center;
CGPoint point = CGPointMake(self.anView.center.x, self.anView.center.y-170);
[UIView animateWithDuration:0.3 animations:^{
self.anView.center = point;
} completion:^(BOOL finished) {
[UIView animateWithDuration:1 animations:^{
self.anView.center = originalPoint;
}];
}];
}

四、旋转动画(改变transform)

-(void)transform{
CGAffineTransform originalTransform = self.anView.transform;
[UIView animateWithDuration:2 animations:^{
//self.anView.transform = CGAffineTransformMakeScale(0.6, 0.6);//缩放
//self.anView.transform = CGAffineTransformMakeTranslation(60, -60);
self.anView.transform = CGAffineTransformMakeRotation(4.0f);
} completion:^(BOOL finished) {
[UIView animateWithDuration:2 animations:^{
self.anView.transform = originalTransform;
}];
}];
}

五、透明度动画(改变alpha)

-(void)alpha{
[UIView animateWithDuration:2 animations:^{
self.anView.alpha = 0.3;
} completion:^(BOOL finished) {
[UIView animateWithDuration:2 animations:^{
self.anView.alpha = 1;
}];
}];
}

六、背景颜色Keyframes动画（改变background）

-(void)changeBackground{
[UIView animateKeyframesWithDuration:9.0 delay:0.f options:UIViewKeyframeAnimationOptionCalculationModeLinear animations:^{
[UIView addKeyframeWithRelativeStartTime:0.f relativeDuration:1.0 / 4 animations:^{
self.anView.backgroundColor = [UIColor colorWithRed:0.9475 green:0.1921 blue:0.1746 alpha:1.0];
}];
[UIView addKeyframeWithRelativeStartTime:1.0 / 4 relativeDuration:1.0 / 4 animations:^{
self.anView.backgroundColor = [UIColor colorWithRed:0.1064 green:0.6052 blue:0.0334 alpha:1.0];
}];
[UIView addKeyframeWithRelativeStartTime:2.0 / 4 relativeDuration:1.0 / 4 animations:^{
self.anView.backgroundColor = [UIColor colorWithRed:0.1366 green:0.3017 blue:0.8411 alpha:1.0];
}];
[UIView addKeyframeWithRelativeStartTime:3.0 / 4 relativeDuration:1.0 / 4 animations:^{
self.anView.backgroundColor = [UIColor colorWithRed:0.619 green:0.037 blue:0.6719 alpha:1.0];
}];
[UIView addKeyframeWithRelativeStartTime:3.0 / 4 relativeDuration:1.0 / 4 animations:^{
self.anView.backgroundColor = [UIColor whiteColor];
}];
} completion:^(BOOL finished) {
NSLog(@"动画结束");
}];
}

七、Spring动画（iOS7.0起）

-(void)springAnimation{
CGRect originalRect = self.anView.frame;
CGRect rect = CGRectMake(self.anView.frame.origin.x-80, self.anView.frame.origin.y, 120, 120);
[UIView animateWithDuration:0.4 delay:0 usingSpringWithDamping:0.5 initialSpringVelocity:4 options:UIViewAnimationOptionCurveLinear animations:^{
self.anView.frame = rect;
} completion:^(BOOL finished) {
[UIView animateWithDuration:1 delay:1 usingSpringWithDamping:0.5 initialSpringVelocity:4 options:UIViewAnimationOptionCurveLinear animations:^{
self.anView.frame = originalRect;
} completion:^(BOOL finished) {
}];
}];
}

八、transition动画

-(void)transitionAnimation{
[UIView transitionWithView:self.anView duration:2.0 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{
//self.anView.backgroundColor = [UIColor blueColor];
} completion:^(BOOL finished) {
[UIView transitionWithView:self.anView duration:2.0 options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
//self.anView.backgroundColor = [UIColor greenColor];
} completion:^(BOOL finished) {
}];
}];
}

九、关于参数option选择说明

1.UIViewAnimationOptions

UIViewAnimationOptionLayoutSubviews            //进行动画时布局子控件

UIViewAnimationOptionAllowUserInteraction      //进行动画时允许用户交互

UIViewAnimationOptionBeginFromCurrentState     //从当前状态开始动画

UIViewAnimationOptionRepeat                    //无限重复执行动画

UIViewAnimationOptionAutoreverse               //执行动画回路

UIViewAnimationOptionOverrideInheritedDuration //忽略嵌套动画的执行时间设置

UIViewAnimationOptionOverrideInheritedCurve    //忽略嵌套动画的曲线设置

UIViewAnimationOptionAllowAnimatedContent      //转场：进行动画时重绘视图

UIViewAnimationOptionShowHideTransitionViews   //转场：移除（添加和移除图层的）动画效果

UIViewAnimationOptionOverrideInheritedOptions  //不继承父动画设置

UIViewAnimationOptionCurveEaseInOut            //时间曲线，慢进慢出（默认值）

UIViewAnimationOptionCurveEaseIn               //时间曲线，慢进

UIViewAnimationOptionCurveEaseOut              //时间曲线，慢出

UIViewAnimationOptionCurveLinear               //时间曲线，匀速

UIViewAnimationOptionTransitionNone            //转场，不使用动画

UIViewAnimationOptionTransitionFlipFromLeft    //转场，从左向右旋转翻页

UIViewAnimationOptionTransitionFlipFromRight   //转场，从右向左旋转翻页

UIViewAnimationOptionTransitionCurlUp          //转场，下往上卷曲翻页

UIViewAnimationOptionTransitionCurlDown        //转场，从上往下卷曲翻页

UIViewAnimationOptionTransitionCrossDissolve   //转场，交叉消失和出现

UIViewAnimationOptionTransitionFlipFromTop     //转场，从上向下旋转翻页

UIViewAnimationOptionTransitionFlipFromBottom  //转场，从下向上旋转翻页

2.UIViewKeyframeAnimationOptions

UIViewAnimationOptionLayoutSubviews           //进行动画时布局子控件

UIViewAnimationOptionAllowUserInteraction     //进行动画时允许用户交互

UIViewAnimationOptionBeginFromCurrentState    //从当前状态开始动画

UIViewAnimationOptionRepeat                   //无限重复执行动画

UIViewAnimationOptionAutoreverse              //执行动画回路

UIViewAnimationOptionOverrideInheritedDuration //忽略嵌套动画的执行时间设置

UIViewAnimationOptionOverrideInheritedOptions //不继承父动画设置

UIViewKeyframeAnimationOptionCalculationModeLinear     //运算模式 :连续

UIViewKeyframeAnimationOptionCalculationModeDiscrete   //运算模式 :离散

UIViewKeyframeAnimationOptionCalculationModePaced      //运算模式 :均匀执行

UIViewKeyframeAnimationOptionCalculationModeCubic      //运算模式 :平滑

UIViewKeyframeAnimationOptionCalculationModeCubicPaced //运算模式 :平滑均匀

就UIView的动画而言，UIViewKeyframeAnimationOptions紧在Keyframes，其余的都是UIViewAnimationOptions。

十、总结和扩展

1.UIView动画主要是变化UIView的自带属性

2.UIView动画可以有很多种方式实现同一效果

3.Spring动画iOS7.0以上才有

4.UIViewKeyframeAnimationOptions用着Keyframes动画，其余都用UIViewAnimationOptions枚举

十一、源码地址

https://github.com/minggo620/iOSViewAnimation