IOS 实现3D 浮动效果动画

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;