Force view controller to reload to refresh UIAppearance changes
我已经搜索了很长时间，但找不到答案。我正在开发一个 iOS 应用程序，并且有一个模式设置页面，该页面出现在点击一个按钮并返回一个 segue。
我想实现的选项之一是配色方案设置。我真的想避免手动更改页面上每个元素的颜色。
Apple 为这类事情提供了 UIAppearance 协议(因此我可以设置所有按钮的文本颜色等。
他们的文档说：
Note: iOS applies appearance changes when a view enters a window, it doesn’t change the appearance of a view that’s already in a window. To change the appearance of a view that’s currently in a window, remove the view from the view hierarchy and then put it back.
我的问题是如何做到这一点。我试过调用 viewWillAppear 和 setNeedsDisplay 没有运气。
尝试使用这个片段：
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NSArray *windows = [UIApplication sharedApplication].windows;
for (UIWindow *window in windows) { for (UIView *view in window.subviews) { [view removeFromSuperview]; [window addSubview:view]; } } |
http://snipplr.com/view/75259/refresh-uiappearance-after-application-loaded/
使用 UIAppearance 更改应用程序主题后，它对我来说非常适合
请注意，上面的答案会对您的系统键盘行为产生不利影响。
事实证明，每当显示键盘时，iOS 都会在后台创建一个带有
您可以通过使用附加检查来解决此问题，如下所示：
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for window in UIApplication.shared.windows {
// Whenever a system keyboard is shown, a special internal window is created in application // window list of type UITextEffectsWindow. This kind of window cannot be safely removed without // having an adverse effect on keyboard behavior. For example, an input accessory view is // disconnected from the keyboard. Therefore, a check for this class is needed. In case this class // that is indernal is removed from the iOS SDK in future, there is a"fallback" class check on // NSString class that always fails. if !window.isKind(of: NSClassFromString("UITextEffectsWindow") ?? NSString.classForCoder()) { window.subviews.forEach { $0.removeFromSuperview() window.addSubview($0) } } } |
请注意，
注意：对于简单的应用程序，您可能可以使用
具体来说，要获取当前视图及其父视图，请尝试：
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UIView *currentview = self.window.rootViewController.view;
UIView *superview = currentview.superview; [currentview removeFromSuperview]; [superview addSubview:currentview]; |
为我工作。
对于斯威夫特：
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let windows = UIApplication.sharedApplication().windows
for window in windows { for view in window.subviews { view.removeFromSuperview() window.addSubview(view) } } |
对于 Swift 3.0.2：
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for window in UIApplication.shared.windows {
for view in window.subviews { view.removeFromSuperview() window.addSubview(view) } // update the status bar if you change the appearance of it. window.rootViewController?.setNeedsStatusBarAppearanceUpdate() } |
这是一个 Swift 5 单线：
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UIApplication.shared.windows.forEach { $0.subviews.forEach { $0.removeFromSuperview(); self.window?.addSubview($0) }}
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试试
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[self.yourView removeFromSuperView];
[self addSubView:yourView]; |
对于 swift 4：
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let windows = UIApplication.shared.windows
for window in windows { for view in window.subviews { view.removeFromSuperview() window.addSubview(view) } } |
大多数答案非常适合将语言从 LTR 更改为 RTL，但有时标签栏导航标题和导航栏标题不会被翻译。我用以下代码
解决了这个问题
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if let app = UIApplication.shared.delegate as? AppDelegate, let window = app.window {
window.rootViewController = TabNavigationController() let tab = window.rootViewController as? UITabBarController tab?.selectedIndex = 3 window.makeKeyAndVisible() } |
objective C
self.view.window.overrideUserInterfaceStyle = UIUserInterfaceStyleDark;
如果我想在所有视图控制器中更改 overrideUserInterfaceStyle，我会使用此代码
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/268628.html