How to remove the outer border of UITextField presented in UIAlertActionController

问题

I am adding multiple UITextFields to my alert controller, and I don't want that ugly black box around them. I know it's not the border property of the textField, because I have tried setting that and that influences the actual textField, not the box.

I have tried

textField.superview?.backgroundColor = UIColor.redColor() textField.superview?.layer.borderColor = UIColor.redColor().CGColor

Setting the background Color works as expected, filling in the space between the textfield and the "black border" but setting the borderColor or borderWidth on superview.layer do nothing. Any ideas?

回答1:

I ended up subclassing UIAlertController.

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    for field in textFields! as [UITextField] {
        field.superview?.superview?.layer.borderWidth = 2
        field.superview?.superview?.layer.borderColor = UIColor.whiteColor().CGColor
    }
}

来源：https://stackoverflow.com/questions/28243453/how-to-remove-the-outer-border-of-uitextfield-presented-in-uialertactioncontroll