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，我已将视图的xib文件中的背景颜色设置为“clear color”。它在iOS 6及更早版本上运行良好..但在iOS 7上它不起作用任何想法我怎么能让它工作？我希望它完全透明

Answer 1

这会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为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];
}

Answer 2

我正在追逐相同的问题，因为我有一个数字小键盘，只能在横向模式下填充屏幕的左半部分（并且在iOS7上基本上无法使用，其中模糊效果覆盖整个屏幕宽度）。我还没弄明白如何得到我想要的东西（仅在我的实际inputView后面模糊背景），但我已经想出如何完全禁用模糊：

定义UIView的自定义子类并在xib文件中指定

在此类中覆盖willMoveToSuperview：如下

- (void)willMoveToSuperview:(UIView *)newSuperview
{
    if (UIDevice.currentDevice.systemVersion.floatValue >= 7 &&
        newSuperview != nil)
    {
        CALayer *layer = newSuperview.layer;
        NSArray *subls = layer.sublayers;
        CALayer *blurLayer = [subls objectAtIndex:0];
        [blurLayer setOpacity:0];
    }
}

这似乎会影响我拥有的每个自定义inputView（但不是系统键盘）的背景，因此如果您不想要将inputView从superview中删除，则可能需要保存/恢复正常的不透明度值。那。

Answer 3

iOS 7正在做一些未记录的事情。但是，您可以通过在自定义输入视图中覆盖-willMoveToSuperview来检查视图层次结构并调整相关视图。例如，此代码将使背景透明：

- (void)willMoveToSuperview:(UIView *)newSuperview {

    NSLog(@"will move to superview of class: %@ with sibling views: %@", [newSuperview class], newSuperview.subviews);

    if ([newSuperview isKindOfClass:NSClassFromString(@"UIPeripheralHostView")]) {

        UIView* aSiblingView;
        for (aSiblingView in newSuperview.subviews) {
            if ([aSiblingView isKindOfClass:NSClassFromString(@"UIKBInputBackdropView")]) {
                aSiblingView.alpha = 0.0;
            }
        }
    }
}

iOS 7上的UITextView的inputView

3 个答案: