ios访问主窗口或视图。-iosaccessmainwindoworview

47  

Try :

试一试:

UIWindow *frOntWindow= [[[UIApplication sharedApplication] windows]
                                                            lastObject];

or simply :

或者仅仅是:

UIWindow *frOntWindow= [[UIApplication sharedApplication] keyWindow];

12  

The main window is best found using UIWindow * mainWindow = [UIApplication sharedApplication].windows.firstObject;

主窗口最好使用UIWindow * mainWindow = [UIApplication sharedApplication].window . firstobject;

Using keyWindow can return a keyboard or UIAlertView window, which lie above your application window.

使用keyWindow可以返回一个键盘或UIAlertView窗口，它位于应用程序窗口的上方。

3  

If you have a pointer to some subview in the window, you can easily access its window:

如果您有一个指向窗口中的子视图的指针，您可以很容易地访问它的窗口:

UIWindow *window = mySubview.window;

2  

Simply clever, works from any class:

简单的聪明，来自于任何阶层:

[(YourAppDelegate *)[[UIApplication sharedApplication] delegate] window];

Note: don't forget to import your appDelegate class

注意:不要忘记导入appDelegate类。