CGFloat m34 = 800;
CGFloat value = -40;//(控制翻转角度)
CGPoint point = CGPointMake(0.5, 0.5);//设定翻转时的中心点,0.5为视图layer的正中
CATransform3D transfrom = CATransform3DIdentity;
transfrom.m34 = 1.0 / m34;
CGFloat radiants = value / 360.0 * 2 * M_PI;
transfrom = CATransform3DRotate(transfrom, radiants, 1.0f, 0.0f, 0.0f);//(后面3个 数字分别代表不同的轴来翻转,本处为x轴)
CALayer *layer = self.panView.layer;
layer.anchorPoint = point;
layer.transform = transfrom;