学习CGAffineTransform和CATransform3D

在公司闲得无聊，就学习一些新的东西。不吸收一些新的知识，必然会被社会淘汰。而自己光看不记得话，总是走神，所以把自己学习的东西记录下来，留给以后查看。今天学习一下CATransform3D和CGAffineTransform.
CGAffineTransform是作用于View的主要为2D变换，CATransform3D主要作用于layer，为3D变换使用，这两种变化可以转换。

//旋转
-（IBAction）doRotate:(id)sender
{
//当你改变过一个view.transform属性或者view.layer.transform的时候需要恢复默认状态的话，要先将它们重置，如下代码
transformItem.transform = CGAffineTransformIdentity;
//锚点的默认值是（0.5,0.5），也就是anchorPoint默认在layer的中心点，旋转、平移、缩放都是根据锚点来的，iOS的坐标原点在左上角
transformItem.layer.anchorPoint = CGPointMake(1,0)；
//center属性是用CGPoint表示矩形中心点在其父视图的位置
transformItem.center = CGPointMake(CGRectGetWidth(transformItem.bounds),0.0)
[UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
transformItem.transform = CGAffineTransformRotate(transformItem.transform,DEGREES_TO_RADIANS(-90));
} completion:^(Bool finished){
}];
}
//缩放
-（IBAction）doScale:(id)sender
{
CGAffineTransform tr = CGAffineTransformScale(transformItem.transform,2,2);
CGFloat h = transformItem.frame.size.height;
[transformItem.layer setAnchorPoint:CGPointMake(0,1)];
[UIView animateWithDuration:1 delay:0 option:UIViewAnimationOptionCurveEaseOut animation:^{
transformItem.transform = tr;
}completion:^(Bool finisher){
}];
}
//位移
-（IBAction）doTranslate:(id)sender{
[UIView animationWithDuration:1 delay:0 option:UIViewAnimationOptionCurveEaseOut animation:^{
transformItem.transform = CGAffineTransformTranslate(transformItem.transform,100,0);
}completion:^(Bool finished){
}];

//旋转
-（CAAnimation *）animationRotate
{
CATransform3D rotationTransform = CAtransform3DMakeRotation(M_PI,0,1.0,0.0)
CABasicAnimation *animation;
animation = [CABasicAnimation animationWithKeyPath:@"transform"];
animation.toValue = [NSValue valueWithCATransform3D:rotationTransform];
animation.during = 1.5;
animation.autoreverses =No;
animation.cumulative =YES;
animation.repeatCount =FLT_MAX;
animation.beginTime=0.6
animation.delegate =self
return animation
}
-（IBAction）do3dRotate:(id)sender{
CAAnimation *myAnimationRotate = [self animationRotate];
[transformItem.layer addAnimation:myAnimationRotate forkey:ANIM_ROTATE];
}