我已经看到 UITextField 的答案，但我似乎无法在应用程序委托中为 UITextView 更改 keyboardAppearance 找到明确的答案。这甚至可能吗？
UITextView.appearance().keyboardAppearance = .dark
导致崩溃
【问题讨论】：
我正在经历同样的不良行为。
在 didFinishLaunchingWithOptions 中放置后：
UITextView.appearance().keyboardAppearance = .dark
一旦 UITextView 必须出现在屏幕上，就会触发下一个错误：
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Have you sent -setKeyboardAppearance: to <UITextView: 0x7ff31113e000; frame = (0 0; 0 0); text = '"Enter an optional commen...'; clipsToBounds = YES; gestureRecognizers = <NSArray: 0x60000209fb10>; layer = <CALayer: 0x600002ecc740>; contentOffset: {0, 0}; contentSize: {0, 37}; adjustedContentInset: {0, 0, 0, 0}> off the main thread? To verify, look for a complaint in the logs: "Unsupported use of UIKit…", and fix the problem if you find it. If your use is main-thread only please file a radar on UIKit, and attach this log. exercisedImplementations = {
"setKeyboardAppearance:" = (
);
}'
这很奇怪，因为 UITextView 遵循 UITextInputTraits 协议，它允许我们定义默认键盘外观。
任何帮助将不胜感激。
【讨论】：