ios - Override shouldAutorotateToInterfaceOrientation defined in Category

Question

I have the following category defined to allow orientation in a TabBarController

@implementation UITabBarController (MyApp) 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

@end

Now there are a couple of viewcontrollers where I don't want to allow landscape-mode. Because I used categories the methods in the viewcontrollers are ignored. Is there a way to solve this?

(I know you can subclass UITabBarController but this is discouraged by Apple themself).

Answer 1

您可以像这样询问您类别中的当前视图控制器：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return [[self selectedViewController] shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}

您可能想要实现更多逻辑，具体取决于您的需要。此外，在您的情况下，子类化比自定义类别更好，全局覆盖事物可能会在未来的某个时候中断。