涉及到的技术点

CATransform3DRotate

转换坐标系

整体视图的层级结构

tvOSCardView

cardImageView

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:///p/42770b5cee0d
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