使用标识符/标签(SWIFT)从UIView获取UITextField [英] Get UITextField from UIView using an Identifier/Tag (SWIFT)

问题描述

我需要知道如何从ViewController类访问UIView中的特定UITextField.

I need to know how I can access a particular UITextField within a UIView from the ViewController class.

我目前的设置是我有一个链接到情节提要中的View的ViewController.我在笔尖中有3个UITextFields的UIView.我使用以下代码加载视图:

The setup I have currently is that I have ViewController that is linked to a View in Storyboard. I have UIView in nib that has 3 UITextFields. I load the view up using the following code:

TextFieldView = UINib(nibName: "TextView", bundle: nil).instantiateWithOwner(nil, options: nil)[0] as! UIView
self.view.addSubview(TextFieldView)

我可以使用以下代码获取所有三个UITextField及其值:

I can get all three UITextField and their values using the following code:

for case let textField as UITextField in TextView!.subviews {
    print(textField.text)
}

我的问题是，如何使用某种标识符或标签来获取任何一个特定UITextField的值.可以说我有3个分别名为TextField1，TextField2和TextField3的UITextField.如何获取TextField2的值?

My issue is that how can I get the value of any one particular UITextField using some sort of identifier or a tag. Lets say I have 3 UITextFields named TextField1, TextField2, and TextField3 respectively. How do I get the value of TextField2?

推荐答案

如果要按类查找它，则可以像这样循环:

If you want to find it by class then you can loop like as :

for view in self.view.subviews {
    if let textField = view as? UITextField {
        print(textField.text!)
    }
}

如果要查找标记，则可以使用@BalajiKondalrayal所述的 viewWithTag .

If you want to find through tag then you can use viewWithTag as described by @BalajiKondalrayal.

按如下所示设置文本字段的标签:

Set tag of text field as follows :

选择文本字段并设置标签属性.

Select text field and set tag property.

@IBAction func getAllTextFromTextFields(sender: AnyObject) {
    //Get All Values
    for view in self.view.subviews {
        if let textField = view as? UITextField {
            print(textField.text!)
        }
    }
    //Get One By One with Tag
    if let txtField1 = self.view.viewWithTag(1) as? UITextField {
        print(txtField1.text!)
    }

}

希望它能对您有所帮助.

Hope it help you.

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