IOS 實現3D 浮動效果動畫_IOS

涉及到的技術點

1. CATransform3DRotate
2. 轉換座標系
   

整體視圖的層級結構

1. tvOSCardView
2. cardImageView
3. cardParallaxView
   

轉換座標系的代碼

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動畫的運行結果

文／JoyceZhao（簡書作者）
原文連結：http://www.jianshu.com/p/42770b5cee0d
著作權歸作者所有，轉載請聯絡作者獲得授權，並標註“簡書作者”。