如何在UITextField返回键上添加操作？ [英] how to add an action on UITextField return key?

问题描述

我的视图中有一个按钮和文本文本字段。当我点击文本字段时，键盘出现，我可以在文本字段上书写，我也可以通过添加以下单击按钮来解除键盘：

I have a button and text textfield in my view. when i click on the textfield a keyboard appears and i can write on the textfield and i also able to dismiss the keyboard by clicking on the button by adding:

[self.inputText resignFirstResponder];

现在我想启用键盘的返回键。当我按下键盘时，键盘会消失，会发生一些事情。我怎么能这样做？

Now I want to enable return key of keyboard. when i will press on the keyboard keyboard will disappear and something will happen. How can I do this?

推荐答案

确保self订阅 UITextFieldDelegate 并初始化inputText：

Ensure "self" subscribes to UITextFieldDelegate and initialise inputText with:

self.inputText.delegate = self;

将以下方法添加到self：

Add the following method to "self":

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    if (textField == self.inputText) {
        [textField resignFirstResponder];
        return NO;
    }
    return YES;
}

或者在Swift中：

func textFieldShouldReturn(textField: UITextField) -> Bool {
    if textField == inputText {
        textField.resignFirstResponder()
        return false
    }
    return true
}

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