Question

我有一个UIViewController子类来处理我对仅景观应用程序的视图。我希望它的视图可以调整大小以自动反映景观尺寸，但似乎并非如此。但是，子视图会这样做。

这是再现代码。

@interface MyViewController : UIViewController {
  UIView *subview;
}

@implementation MyViewController

- (id)init
{
  self = [super init];
  if (self) {
    self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

    subview = [[UIView alloc] initWithFrame:self.view.frame];
    subview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    [self.view addSubview:subview];
  }

  return self;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
  return UIInterfaceOrientationIsLandscape(toInterfaceOrientation);
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
  NSLog(@"My view's frame (%f,%f)", self.view.frame.size.width, self.view.frame.size.height);
  NSLog(@"Subview's frame (%f,%f)", subview.frame.size.width, subview.frame.size.height);
}

@end

然后......

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
  self.window.rootViewController = [[MyViewController alloc] init];
  [self.window makeKeyAndVisible];
  return YES;
}

超级简单。然而，在启动时，它会记录：

My view's frame (320.000000,480.000000)
Subview's frame (480.000000,320.000000)

子视图正确调整大小，但父视图仍然具有纵向框架。

如何调整顶层视图以适应横向模式？

Answer 1

在viewController中使用它

self.view.frame = [[UIScreen mainScreen] bounds];

Answer 2

您必须允许窗口自动调整子视图：

window.autoresizesSubviews=YES;

希望这有帮助！

Answer 3

self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

在viewdidload中添加此内容。确保在storyboard中，Viewcontrollers视图属性被分配给视图

Answer 4

试试这个：

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

    if (toInterfaceOrientation == UIInterfaceOrientationPortrait || toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {

        //is portrait

        view.frame = CGRectMake(0,0,320,480)


    } else {

       //is landscape

       view.frame = CGRectMake(0,0,480,320);

    }
}

希望这有帮助！

如何将第一个UIViewController的视图设置为自动调整大小？

4 个答案: