iphone - iOS 7 上的 UITextView 的 inputView

Question

我正在尝试为 UITextField 创建自定义键盘，此 inputView 的背景应该是透明的，我已将 View 的 xib 文件中的背景颜色设置为“清晰颜色”。它在 iOS 6 和更早版本上运行良好。但在 iOS 7 上它不起作用知道如何让它工作吗？我希望它是完全透明的

Answer 1

这将在显示自定义键盘时将背景不透明度设置为零，并在显示普通键盘时将其重置回 1。

+ (void)updateKeyboardBackground {
    UIView *peripheralHostView = [[[[[UIApplication sharedApplication] windows] lastObject] subviews] lastObject];

    UIView *backdropView;
    CustomKeyboard *customKeyboard;

    if ([peripheralHostView isKindOfClass:NSClassFromString(@"UIPeripheralHostView")]) {
        for (UIView *view in [peripheralHostView subviews]) {
            if ([view isKindOfClass:[CustomKeyboard class]]) {
                customKeyboard = (CustomKeyboard *)view;
            } else if ([view isKindOfClass:NSClassFromString(@"UIKBInputBackdropView")]) {
                backdropView = view;
            }
        }
    }

    if (customKeyboard && backdropView) {
        [[backdropView layer] setOpacity:0];
    } else if (backdropView) {
        [[backdropView layer] setOpacity:1];
    }
}

+ (void)keyboardWillShow {
    [self performSelector:@selector(updateKeyboardBackground) withObject:nil afterDelay:0];
}

+ (void)load {
    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
    [nc addObserver:self selector:@selector(keyboardWillShow) name:UIKeyboardWillShowNotification object:nil];
}