iOS7中的UITextField InputView背景颜色问题

Question

我正在使用UITextField的自定义键盘。所以我将自定义视图分配给TextField的inputView属性。 CustomView背景颜色在iOS7中显示为黑色，其中clearColor小于iOS7。代码和截图（iOS6的，iOS7）低于：

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