如何将UIView转换为横向和全屏？

Question

我想将UIView从纵向模式转换为横向模式，并将其设为全屏模式。我怎么能这样做？

CGFloat degrees = 90;
CGAffineTransform transform = CGAffineTransformMakeRotation((M_PI * degrees / 180.0f));

[UIView animateWithDuration:0.3f animations:^{
    transitionView.transform = transform;
    // How to set the origin to make it fullscreen?
} completion:^(BOOL finished) {
}];

Answer 1

您必须选择视图并为该视图提供约束，使其与边距一致（如下所示）。然后它会自动拉伸到全屏。

您还可以使用尺寸类，并为横向和纵向模式设置不同的约束。

Answer 2

这里是swift 4中的解决方案

if UIDeviceOrientationIsLandscape(UIDevice.current.orientation){
        let screenSize = UIScreen.main.bounds
        let screenWidth = screenSize.width
        let screenHeight = screenSize.height
        videoView.frame = CGRect(x: 0, y: 0, width: screenWidth, height: screenHeight)
        playerLayer.frame = videoView.bounds
}

Answer 3

1. 通过交换高度和宽度来更改视图框
2. 旋转-90度（逆时针旋转）

3. 平移以匹配新的原点（因为围绕视图中心点执行旋转）

   UIView.animate(withDuration: 0.3) {
       self.frame = CGRect(origin: .zero, size: CGSize(width: UIScreen.main.bounds.height,
                                                               height: UIScreen.main.bounds.width))
   
       let rotate = CGAffineTransform(rotationAngle: -.pi / 2)
       let center = self.view.center
       let translate = CGAffineTransform(translationX: center.x + center.y - self.bounds.width,
                                         y: center.y - center.x)
       self.transform = translate.concatenating(rotate)
   }