如何在UIAlertController中设置UITextField的高度？

Question

我知道要使用此代码以编程方式设置常规文本字段的高度

textField.frame.size.height = 60

但是，如果我将此代码实现到UIAlertController内的文本字段，那么它就不起作用了。我也尝试将键盘更改为支持ASCII的键盘，但在运行应用程序后它不会更改键盘。我好像错过了什么

以下是我的警报控制器的代码

let alertController = UIAlertController(title: "Write Comment", message: "Tell us why you are not satisfied", preferredStyle: .alert)

alertController.addAction(UIAlertAction(title: "Send", style: .default, handler: { alert -> Void in
    let textField = alertController.textFields![0] as UITextField
    textField.frame.size.height = 60
    textField.keyboardType = .asciiCapable

    let commentDefect = textField.text ?? ""
    self.sendComment(defectID: defectID, comment: commentDefect)

}))

alertController.view.tintColor = UIColor(red: 0/255, green: 129/255, blue: 58/255, alpha: 1)
alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
alertController.addTextField(configurationHandler: {(textField : UITextField!) -> Void in
    textField.placeholder = ""
})

self.present(alertController, animated: true, completion: nil)

结果如下：

似乎高度仍然在17左右。这里出了什么问题？

Answer 1

您已添加以下代码： -

alertController.addTextField(configurationHandler: {(textField : UITextField!) -> Void in
        textField.placeholder = ""
        let heightConstraint = NSLayoutConstraint(item: textField, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 120)
        textField.addConstraint(heightConstraint)
}) 

希望对你有所帮助。

重复

Answer 2

let alertController = UIAlertController(title: "Write Comment", message: "Tell us why you are not satisfied", preferredStyle: .alert)
        alertController.addTextField { (textField:UITextField) in

            let heightConstraint = NSLayoutConstraint(item: textField, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: yourHeightValue)
            textField.placeholder = ""
            textField.addConstraint(heightConstraint)
            textField.keyboardType = .asciiCapable
        }
        alertController.addAction(UIAlertAction(title: "Send", style: .default, handler: { (alert) in

            let commentDefect = alertController.textFields?.first?.text ?? ""
            self.sendComment(defectID: defectID, comment: commentDefect)
        }))
        alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
        alertController.view.tintColor = UIColor(red: 0.0/255.0, green: 129.9/255.0, blue: 58.0/255.0, alpha: 1.0)
        self.present(alertController, animated: true, completion: nil)