UIControlEventEditingChanged不会触发时使用setText的UITextfield [英] UIControlEventEditingChanged doesnt get fired when using setText of UITextfield

问题描述

我目前正在尝试跟踪文本字段的状态。

I am currently trying to track the states of a textfield.

我使用自定义的datePicker通过设置文本-setText

I am using a custom datePicker which sets the text via -setText

[self.textField setText:[self.dateFormatter stringFromDate:self.date]];

在我的 textFieldDelegate 里面，我使用下面几行代码：

Inside my textFieldDelegate i use the following lines of Code :

....//viewDidLoad
        self.travelToOnTextField.delegate = self;
        [self.travelToOnTextField addTarget:self action:@selector(travelToOnTextFieldDidChange:) forControlEvents:UIControlEventEditingChanged]; }

-(void)travelToOnTextFieldDidChange:(id)sender
{
        NSLog(@"Event Handler called");
}

所以如果我通过自定义Datepicker改变文本方法 travelToOnDateTextFieldDidChange 不会调用。但如果我通过我的电脑键盘更改文本，它被调用。

So if i change the text via my custom Datepicker the Method travelToOnDateTextFieldDidChange doesnt get called. But if i change the text via my Computer Keyboard it gets called.

Hack我做错了什么？

What the Hack i am doing wrong ?

推荐答案

对此问题进行评分，因为这是重要的。

I had to rate this question up because this is super important.

这似乎在iOS6中已经改变。也许甚至iOS5。此事件已使用成为在UITextField中观察文本更改的首选方法。我从iOS3以来一直使用它。在iOS6上重新编译我的应用程序以执行一些更新后，它神秘地停止工作。我的应用程式的部分使用：

It appears this has changed in iOS6. Maybe even iOS5. This event USED to be the preferred method for observing text changes in a UITextField. I've been using it since iOS3. After recompiling my app on iOS6 to perform some updates, it mysteriously stopped working. Parts of my app use:

[UITextField insertText];

和其他人使用

[UITextField setText];

或

UITextField.text = @"xxx";

无论如何，请务必注意 setText strong>事件不再触发编辑已更改事件。如果你使用一个insertText方法，它仍然可以工作。

For whatever reason it's important to note that setText events no longer fire the Editing Changed event. If you use an insertText method, it still works.

所以如果你是一个绑定，你只需要一个快速修复，你可以更改你的代码：

So if you're in a bind and you just need a quick fix, you can change out your code from:

textField.text;

或

[textField setText:@"xxx"];

到

textField.text = @"";
[textField insertText:@"new text"];

这也有效：

[((UITextField*)view) sendActionsForControlEvents:UIControlEventEditingChanged];

我希望这可以帮助某人，因为我浪费了一整天试图找出为什么这个代码突然停止

I hope this helps someone, because I wasted an entire day trying to figure out why this code suddenly stopped working when I moved up to iOS6.

您仍然可以使用NSNotificationCenter。有关详情，请参阅UITextField参考：

You can still use NSNotificationCenter as well. See the UITextField reference for more info:

http：//developer.apple.com/library/ios/#documentation/UIKit/Reference/UITextField_Class/Reference/UITextField.html

这篇关于UIControlEventEditingChanged不会触发时使用setText的UITextfield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！