Question

我正在尝试将图像作为ipad应用程序中viewcontroller的背景。我用

设置了这个

UIImage *background = [UIImage imageNamed: @"Pilot@2x~ipad.png"];
            UIImageView *imageView = [[UIImageView alloc] initWithImage: background];
            imageView.frame = self.view.bounds;
            [self.view addSubview: imageView];
            [self.view sendSubviewToBack:imageView];

这适用于纵向模式，但是当我将其旋转到横向模式时，会出现图片无法填充的空白区域。基于其他类似帖子的我的想法是在轮换发生变化时调用一个新图片，我尝试了这个

 {    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {

        if((self.interfaceOrientation == UIDeviceOrientationLandscapeLeft) || (self.interfaceOrientation == UIDeviceOrientationLandscapeRight)){

            UIImage *background = [UIImage imageNamed: @"Pilot@2x~ipad.png"];
            UIImageView *imageView = [[UIImageView alloc] initWithImage: background];
            imageView.frame = self.view.bounds;
            [self.view addSubview: imageView];
            [self.view sendSubviewToBack:imageView];



        } else  if((self.interfaceOrientation == UIDeviceOrientationPortrait) || (self.interfaceOrientation == UIDeviceOrientationPortraitUpsideDown)){

            UIImage *background = [UIImage imageNamed: @"PilotLandscape@2x~ipad.png"];
            UIImageView *imageView = [[UIImageView alloc] initWithImage: background];
            imageView.frame = self.view.bounds;
            [self.view addSubview: imageView];
            [self.view sendSubviewToBack:imageView];
        }}

这导致了同样的事情。如何解决这个问题的任何想法将不胜感激！

Answer 1

检查视图的自动调整设置，尝试NSLog视图的坐标，注意uiimageview的UIViewContentModeScale属性。为什么不简单地将imageview添加到故事板？

Answer 2

工作代码：

@interface SOViewController (){
    UIImageView *imageView;
}

@end

-(void)initialOrientationHandling
{
    //[self.view removeFromSuperview];

    if ([[UIDevice currentDevice]orientation] == UIDeviceOrientationLandscapeLeft ||
        [[UIDevice currentDevice]orientation] == UIDeviceOrientationLandscapeRight){

        imageView.frame = self.view.bounds;

        [self.view addSubview: imageView];
        [self.view sendSubviewToBack:imageView];


    }else if ([[UIDevice currentDevice]orientation] == UIDeviceOrientationPortrait ||
              [[UIDevice currentDevice]orientation] == UIDeviceOrientationPortraitUpsideDown){

        imageView.frame = self.view.bounds;

        [self.view addSubview: imageView];
        [self.view sendSubviewToBack:imageView];

    }
    else if([[UIDevice currentDevice]orientation]== UIDeviceOrientationFaceUp){
        if(self.view.frame.size.height < 900){

        }else{

        }
    }
}

-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{

    [self initialOrientationHandling];
}

显然，如果没有高度像素化，图像将会失真。我建议你使用不同的旋转。

Answer 3

（SWIFT）：

首先创建两个图像，一个是横向视图大小，另一个是肖像。

初始化imageview

              var   Imgview = UIImageView()

在viewWillAppear方法中，它在视图加载时以及旋转时更改图像。

     override func viewWillAppear(animated: Bool) {
    Imgview.frame = self.view.frame


    Imgview.contentMode = UIViewContentMode.ScaleAspectFill
    Imgview.clipsToBounds = true
    view.addSubview(Imgview)
         // get notification while rotating

      NSNotificationCenter.defaultCenter().addObserver(self, selector: "rotate", name: UIDeviceOrientationDidChangeNotification, object: nil
    )


         }

旋转设定图像的功能，在通知中心调用。

                 func rotate()
              {

if(UIDeviceOrientationIsLandscape(UIDevice.currentDevice().orientation))
{
    Imgview.frame = self.view.frame
    Imgview.image = UIImage(named: "landscapeSizeimage.png")

    self.view.sendSubviewToBack(Imgview)


   }

   if(UIDeviceOrientationIsPortrait(UIDevice.currentDevice().orientation))
{
    Imgview.frame = self.view.frame
    Imgview.image = UIImage(named: "PortraitSizeimage.png")

    self.view.sendSubviewToBack(Imgview)


   }}

这对我有用。希望它可以帮助某人。我不知道可能会创建更多的图像视图，因此我们可以根据您的意愿删除imageview，而不是带来视图。

将图像设置为视图控制器的背景图像，并在ipad上旋转时保持

3 个答案: