IOS 实现3D 浮动效果动画

涉及到的技术点

1. catransform3drotate
2. 转换坐标系
   

整体视图的层级结构

1. tvoscardview
2. cardimageview
3. cardparallaxview
   

转换坐标系的代码

cgfloat xfactor = min(1, max(-1, (touchpoint.x - (self.bounds.size.width / 2)) / (self.bounds.size.width / 2)));
cgfloat yfactor = min(1, max(-1, (touchpoint.y - (self.bounds.size.height / 2)) / (self.bounds.size.height / 2)));

cardimageview.layer.transform = [self transformwithm34:1.0 / -500 xf:xfactor yf:yfactor];
cardparallaxview.layer.transform = [self transformwithm34:1.0 / -250 xf:xfactor yf:yfactor];

cgfloat zfactor = 180 * atan(yfactor / xfactor) / m_pi + 90;

tvoscardanimation动画的运行结果

文／joycezhao（简书作者）
原文链接：http://www.jianshu.com/p/42770b5cee0d
著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。