1     CATransform3D transform = CATransform3DIdentity; 2      3     // 修改transform的m34达到透视效果 4     // - 1.0 / (500 ~ 1000 效果最好!) 5     // 注意：一定要放在3D前面，顺序不能换，分母越小效果越明显 6     transform.m34 = -1.0 / 1000; 7      8     transform = CATransform3DRotate(transform, M_PI_4, 0, 1, 0); 9     10     _redLayer.transform = transform;