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;
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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”。