如何在 Swift 的子视图中访问 UITextfield？

Question

Here is the objects hierarchy in my ViewController in Main.Storyboard

Button same size with superview. I would like to close the keyboard with the button click action that's why I wrote this code scope:

@IBAction func btnCloseKeyboardClick(_ sender: UIButton) {
    print("A")
    for viewItem in self.view.subviews
    {
        print("B")
        if (viewItem is UITextField)
        {
            print("C")
            let tField = viewItem as! UITextField
            tField.resignFirstResponder()
        }
    }
}

but it does not close the keyboard means I don't see print("C")

I solved this problem like in this link but I would like to ask above situation also

Answer 1

如果您的视图中只有一个文本字段并希望为此关闭键盘，那么简单的方法是在按钮操作中调用view.endEditing(true)