ios 更改 UIViewController self.view 框架
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Change UIViewController self.view frame
提问by Fabrizio Prosperi
I am trying to display a viewController xib view with its view displayed under a fixed header banner (0,0,320,44) which is an imageView added on Application window.
我正在尝试显示一个 viewController xib 视图，其视图显示在固定标题横幅 (0,0,320,44) 下，这是一个添加到应用程序窗口的 imageView。
This is because I need it to stick on the screen while I navigate multiple view controllers. Its a requirement of the project I am doing.
这是因为当我导航多个视图控制器时，我需要它粘在屏幕上。这是我正在做的项目的要求。
So far I have tried:
到目前为止，我已经尝试过：
Resizing the XIB view to the appropriate frame size (0,0,320,416), both with dot notation and setter.
Changing the frame in viewDidLoad with self.view.frame = CGRectMake(0, 44, 320, 416);
调整大小的XIB视图到合适的帧大小（0,0,320,416），都与点符号和setter。
使用 self.view.frame = CGRectMake(0, 44, 320, 416) 更改 viewDidLoad 中的框架；
but it is not working. Any suggestion?
但它不起作用。有什么建议吗？
回答by sundar
Set the frame in viewWillAppear
将框架设置在 viewWillAppear
- (void)viewWillAppear:(BOOL)animated
{
self.view.frame = CGRectMake(0, 44, 320, 416);
[super viewWillAppear:animated];
}
回答by langtutheky
Just want to add a bit more. The reason for changing view of a UIViewController does not work in viewDidLoadis because of the call [window makeKeyAndVisible], which is usually called after your viewDidLoad. This call will change the frame of the window.rootViewControllerto equal the window's frame. You can test this by changing the UIViewController's view.frame AFTER [window makeKeyAndVisible], and the changes will stick.
只是想补充一点。更改 UIViewController 的视图不起作用的原因viewDidLoad是因为调用[window makeKeyAndVisible]，它通常在您的viewDidLoad. 此调用会将 的框架更改window.rootViewController为等于窗口的框架。您可以通过更改 UIViewController 的 view.frame AFTER 来测试这一点，更改将保持不变[window makeKeyAndVisible]。
viewWillAppearand viewDidAppearare called within [window makeKeyAndVisible]but after the view's frame got resized.
viewWillAppear并且在视图的框架调整大小之后viewDidAppear被调用[window makeKeyAndVisible]。
The caveat is that only the top most controller which is the rootViewControllerhas its view's frame changed automatically. This DOES NOT affect any childViewControllersattached to the rootViewController.
需要注意的是，只有最顶层的控制器才会rootViewController自动更改其视图的框架。这不会影响任何childViewControllers附加到rootViewController.
