标签：alpha alt point ack max load 技术分享 oat center
之前我们讲过可以用CALayer搭配CATransform3D来实现将View做3D旋转, 今天我们再看一个3D的新东西
CATransformLayer, 看名字就知道这个layer跟旋转有关, 那么具体是什么呢?
我们看他的头文件, 没有任何属性. 他其实是作为一个容器, 我们可以往里面添加其他的CALayer
比如我们要创建一个3D效果的立方体,
可以先创建一个CATransformlayer容器,
正方体的6个面我们以3D旋转后的Layer表示, 加入到容器中, 调整好每个面的角度和位置让他们拼接再一起就是一个正方体了
我们上代码吧
- (void)viewDidLoad { [super viewDidLoad]; //create cube layer CATransformLayer *cube = [CATransformLayer layer]; //add cube face 1 CATransform3D ct = CATransform3DMakeTranslation(0, 0, 50); [cube addSublayer:[self faceWithTransform:ct]]; //add cube face 2 ct = CATransform3DMakeTranslation(50, 0, 0); ct = CATransform3DRotate(ct, M_PI_2, 0, 1, 0); [cube addSublayer:[self faceWithTransform:ct]]; //add cube face 3 ct = CATransform3DMakeTranslation(0, -50, 0); ct = CATransform3DRotate(ct, M_PI_2, 1, 0, 0); [cube addSublayer:[self faceWithTransform:ct]]; //add cube face 4 ct = CATransform3DMakeTranslation(0, 50, 0); ct = CATransform3DRotate(ct, -M_PI_2, 1, 0, 0); [cube addSublayer:[self faceWithTransform:ct]]; //add cube face 5 ct = CATransform3DMakeTranslation(-50, 0, 0); ct = CATransform3DRotate(ct, -M_PI_2, 0, 1, 0); [cube addSublayer:[self faceWithTransform:ct]]; //add cube face 6 ct = CATransform3DMakeTranslation(0, 0, -50); ct = CATransform3DRotate(ct, M_PI, 0, 1, 0); [cube addSublayer:[self faceWithTransform:ct]]; //center the cube layer within the container CGSize containerSize = self.view.bounds.size; cube.position = CGPointMake(containerSize.width / 2.0, containerSize.height / 2.0); cube.transform = CATransform3DMakeRotation(30, 1, 1, 0); [self.view.layer addSublayer:cube]; } - (CALayer *)faceWithTransform:(CATransform3D)transform { //create cube face layer CALayer *face = [CALayer layer]; face.bounds = CGRectMake(0, 0, 100, 100); //apply a random color CGFloat red = (rand() / (double)INT_MAX); CGFloat green = (rand() / (double)INT_MAX); CGFloat blue = (rand() / (double)INT_MAX); face.backgroundColor = [UIColor colorWithRed:red green:green blue:blue alpha:1.0].CGColor; face.transform = transform; return face; } @end
我们可以再给容器一个旋转动画, 就实现了一个旋转的立方体
CATransform3D transA = CATransform3DMakeRotation(60, 1, 1, 1); CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform"]; animation.duration = 2; animation.autoreverses = YES; animation.repeatCount = 100; animation.toValue = [NSValue valueWithCATransform3D:transA]; [cube addAnimation:animation forKey:nil];
标签：alpha alt point ack max load 技术分享 oat center
原文地址：http://www.cnblogs.com/zhouxihi/p/6290495.html
