Question

我的应用程序有一个带有五个选项卡的UITabBarController。我只需要为第五个标签旋转方向。通过子类化，我能够将所有五个旋转到横向 UITabBarController

@implementation TabBarControllerRotate

-(BOOL)shouldAutorotateToInterfaceOrientation:
    (UIInterfaceOrientation)interfaceOrientation {

//return (interfaceOrientation == UIInterfaceOrientationPortrait);
return (interfaceOrientation == UIInterfaceOrientationLandscapeRight 
          || interfaceOrientation == UIInterfaceOrientationLandscapeLeft
          || interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end

if(tbc == nil){
    //tbc = [[UITabBarController alloc] initWithNibName:nil bundle:nil];        
    tbc = [[TabBarControllerRotate alloc] initWithNibName:nil bundle:nil];  ////// new  //////

...

tbc.viewControllers = 
[NSArray arrayWithObjects:viewController1, viewController2, viewController3
 ,viewController4,viewController5, nil];

我现在需要关闭viewController1 - 4的旋转; 我尝试通过将以下代码添加到四个* .m文件来尝试执行此操作失败这些viewControllers。

- (BOOL)shouldAutorotateToInterfaceOrientation:
    (UIInterfaceOrientation)interfaceOrientation {

return NO;
}

请告诉我如何获得R完成。感谢阅读，Mark

Answer 1

我认为还有其他更简单的方法可以做到这一点，但我终于找到了解决方案。 TabBarController中第五个viewController的标题，唯一一个需要改变方向的是“MyNotes”

在SubListViewController.m内部创建了TabBarControllerRotate对象。

  tbc = [[TabBarControllerRotate alloc] initWithNibName:nil bundle:nil];
  tbc.viewControllers = [NSArray arrayWithObjects:viewController1
          , viewController2, viewController3, viewController4, viewController5, nil
  tbc.delegate = self;

TabBarController子类UITabBarController并包含BOOL属性名字bMyNotes。

SubListViewController是一个UITabBarControllerDelegate

每次在TabBarController中更改视图时，都会发送一条消息，即 - （void）tabBarController：（UITabBarController *）tabBarController didSelectViewController：（UIViewController *）viewController

因此SubListViewController.m包含以下代码：

   #pragma mark UITabBarControllerDelegate methods

   - (void)tabBarController:(UITabBarController *)tabBarController 
        didSelectViewController:(UIViewController *)viewController{
    BOOL b = (viewController.title == @"MyNotes");
    [tbc setBMyNotesTab:b];
    //NSLog(@"MyNotesTab == %d", [tbc bMyNotesTab]);

   }

然后TabBarControllerRotate.m包含：

    - (BOOL)shouldAutorotateToInterfaceOrientation:
          (UIInterfaceOrientation)interfaceOrientation {

        //NSLog(@"bMyNotesTab is: %d",self.bMyNotesTab);

        return ( (interfaceOrientation == UIInterfaceOrientationLandscapeRight 
            || interfaceOrientation == UIInterfaceOrientationLandscapeLeft
            || interfaceOrientation == UIInterfaceOrientationPortrait
                 ) && self.bMyNotesTab 
               );

方向更改需要但仅适用于TabBarViewController中的多个视图之一

@end

1 个答案: