关于ios：如何在Swift中手动启用/禁用键盘Return键？

How could I enable / disable keyboard Return Key manually in Swift?

This question is not duplicated from these:

How to disable/enable the return key in a UITextField?

How to enable or disable the keyboard return key

Enable and Disable Keyboard return key on demand in iOS

我有两个TextFields。

1 2	@IBOutlet weak var textField1: UITextField! @IBOutlet weak var textField2: UITextField!

textField1具有"返回"键之类的"下一步"按钮；
textField2具有"返回"键之类的"转到"按钮；

textField1

textField2

我想启用第二个TextField的"转到"按钮，即使两个TextField都不为空。

我尝试将someTextField.enablesReturnKeyAutomatically与TextFieldDelegate一起使用，但是没有用。

谢谢你的帮助。

相关讨论

下图：textField1为空时，textField2被禁用。如果后者为非空，则启用textField2，但仅当textField2为非空(通过.enablesReturnKeyAutomatically属性)时，启用Go按钮，

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/* ViewController.swift */
import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet weak var textField1: UITextField!
@IBOutlet weak var textField2: UITextField!

override func viewDidLoad() {
super.viewDidLoad()

// text field delegates
textField1.delegate = self
textField2.delegate = self

// set return key styles
textField1.returnKeyType = UIReturnKeyType.Next
textField2.returnKeyType = UIReturnKeyType.Go

// only enable textField2 if textField1 is non-empty
textField2.enabled = false

// only enable 'go' key of textField2 if the field itself is non-empty
textField2.enablesReturnKeyAutomatically = true
}

// UITextFieldDelegate
func textFieldShouldReturn(textField: UITextField) -> Bool {

if (textField1.text?.isEmpty ?? true) {
textField2.enabled = false
textField.resignFirstResponder()
}
else if textField == textField1 {
textField2.enabled = true
textField2.becomeFirstResponder()
}
else {
textField.resignFirstResponder()
}

return true
}
}

运行方式如下：

enter image description here