iOS7中的UITextField InputView背景颜色问题

Question

我正在为UITextField使用自定义键盘。所以我将自定义视图分配给TextField inputView属性。在iOS7中，CustomView背景颜色显示为黑色，与iOS7相比，它是clearColor。代码和屏幕截图（iOs6，iOS7）如下：

keypadContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, appFrame.size.width, appFrame.size.height - ((self.view.frame.origin.y + self.view.bounds.size.height) - kp.bounds.size.height))];
    keypadContainer.backgroundColor=[UIColor clearColor];
    [keypadContainer addSubview:buttonsView]; //Here buttonsView is the view which conatins buttons for 0 to 9 digits.

    numberField.inputView = keypadContainer;
    numberField.inputView.backgroundColor=[UIColor clearColor];

Answer 1

尝试设置keyPadContainer.opaque = NO