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我尝试使用内置的UIViewAnimationOptionTransitionFlipFromRight转换,但转换的起源似乎是UIImageView的中心,而不是左边缘.基本上我有两个UIImageViews,每个填充屏幕.我希望动画看起来像UIImageViews从屏幕中心提升到边缘.
[UIView transitionWithView:leftView duration:1.0 options:UIViewAnimationOptionTransitionFlipFromRight animations:^ { leftView.alpha = 0; } completion:^(BOOL finished) { [leftView removeFromSuperview]; }];
有没有人做过这样的事情?任何帮助都是极好的!
更新:
工作代码感谢Nick Lockwood
leftView.layer.anchorPoint = CGPointMake(0,0.5); // hinge around the left edge leftView.frame = CGRectMake(0,160,460); //reset view position rightView.layer.anchorPoint = CGPointMake(1.0,0.5); //hinge around the right edge rightView.frame = CGRectMake(160,460); //reset view position [UIView animateWithDuration:0.75 animations:^{ CATransform3D leftTransform = CATransform3DIdentity; leftTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective leftTransform = CATransform3DRotate(leftTransform,-M_PI_2,1,0); leftView.layer.transform = leftTransform; CATransform3D rightTransform = CATransform3DIdentity; rightTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective rightTransform = CATransform3DRotate(rightTransform,M_PI_2,0); rightView.layer.transform = rightTransform; }];
每个视图都有一个层属性,子属性是可动画的.在这里,您可以找到所有非常酷的东西,当涉及到动画功能(我建议您阅读可以设置的CALayer类属性 – 它会吹动你的头脑 – 任何视图上的动态柔和的阴影?)
无论如何,回到主题.要旋转你的门打开3D,首先定位他们,如果他们被关闭,所以每个门填充一半的屏幕.
现在设置它们的view.layer.anchorPoint属性如下
leftDoorView.layer.anchorPoint = CGPoint(0,0.5); // hinge around the left edge rightDoorView.layer.anchorPoint = CGPoint(1.0,0.5); // hinge around the right edge
现在应用以下动画
[UIView animateWithDuration:0.5 animations:^{ CATransform3D leftTransform = CATransform3DIdentity; leftTransform.m34 = -1.0f/500; //dark magic to set the 3D perspective leftTransform = CATransform3DRotate(leftTransform,0); //rotate 90 degrees about the Y axis leftDoorView.layer.transform = leftTransform; //do the same thing but mirrored for the right door,that probably just means using -M_PI_2 for the angle. If you don't kNow what PI is,Google "radians" }];
那应该这样做.
免责声明:我没有真正测试过这个,所以角度可能会倒退,而且透视角度可能是螺旋式的,但至少应该是一个好的开始.
更新:好奇心越来越好.这里是完整的工作代码(这假设左右门被布置在Nib文件中的关闭位置):
- (void)viewDidLoad { [super viewDidLoad]; leftDoorView.layer.anchorPoint = CGPointMake(0,0.5); // hinge around the left edge leftDoorView.center = CGPointMake(0.0,self.view.bounds.size.height/2.0); //compensate for anchor offset rightDoorView.layer.anchorPoint = CGPointMake(1.0,0.5); // hinge around the right edge rightDoorView.center = CGPointMake(self.view.bounds.size.width,self.view.bounds.size.height/2.0); //compensate for anchor offset } - (IBACtion)open { CATransform3D transform = CATransform3DIdentity; transform.m34 = -1.0f/500; leftDoorView.layer.transform = transform; rightDoorView.layer.transform = transform; [UIView animateWithDuration:0.5 animations:^{ leftDoorView.layer.transform = CATransform3DRotate(transform,0); rightDoorView.layer.transform = CATransform3DRotate(transform,0); }]; } - (IBACtion)close { [UIView animateWithDuration:0.5 animations:^{ CATransform3D transform = CATransform3DIdentity; transform.m34 = -1.0f/500; leftDoorView.layer.transform = transform; rightDoorView.layer.transform = transform; }]; }
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