我应该使用哪个委托方法来响应对文本字段的点击？ [英] Which delegate method I should use to respond to clicks on a text field?

问题描述

当用户点击文本字段时，我想打开一个面板。我想我应该使用一个委托方法来响应点击事件。我发现

I want to open a panel when the user clicks on a text field. I think I should use a delegate method that responds to the click event. I found that the

- (void)textDidBeginEditing:(NSNotification *)aNotification

方法不起作用，并且

- (void)controlTextDidBeginEditing:(NSNotification *)aNotification

在文本字段中，不是我单击它。如果我再次编辑文本，此方法不工作。为什么？

method works, but only when I edit the text in the text field, not then I click it. If I edit the text again, this method does not work. Why?

对不起，我想在mac上使用，而不是在iphone上，可可？

Sorry, I think I want to use this on mac , not on iphone,How to do with it with cocoa?

推荐答案

textFieldDidBeginEditing：用户开始编辑 UITextField 中的文本，如方法名称所示。

The textFieldDidBeginEditing: delegate method only gets triggered when the user starts editing the text inside the UITextField, as the method name implies.

如果要触发方法当触摸 UITextField 时，应该尝试：

If you want to trigger a method when the UITextField is touched, you should try this:

[textField addTarget:self 
              action:@selector(textFieldTouched:)
    forControlEvents:UIControlEventTouchDown];

- (void) textFieldTouched:(id)sender {
    // Display the panel
}

这篇关于我应该使用哪个委托方法来响应对文本字段的点击？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！