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以编程方式选择 UITextField 中的所有文本

发布于 2024-08-10 05:47:21 字数 36 浏览 9 评论 0原文

如何以编程方式选择 UITextField 中的所有文本？

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无边思念无边月 2024-08-17 05:47:21

这就是对我来说的窍门：

[self.titleField setSelectedTextRange:[self.titleField textRangeFromPosition:self.titleField.beginningOfDocument toPosition:self.titleField.endOfDocument]];

相当丑陋，但它有效，所以不会显示共享菜单控制器！

要解决“仅每秒有效”问题，请使用以下内容：

__weak typeof(self) weakSelf = self;
dispatch_async(dispatch_get_main_queue(), ^{
    __strong __typeof(weakSelf) strongSelf = weakSelf;
    UITextRange *range = [strongSelf textRangeFromPosition:strongSelf.beginningOfDocument toPosition:strongSelf.endOfDocument];
    [strongSelf setSelectedTextRange:range];
});

感谢埃里克·贝克（刚刚从此处的评论中编辑）

Thats what did the trick for me:

[self.titleField setSelectedTextRange:[self.titleField textRangeFromPosition:self.titleField.beginningOfDocument toPosition:self.titleField.endOfDocument]];

Pretty ugly but it works, so there will be no sharedMenuController shown!

To fix the "only works every second time" problem use following:

__weak typeof(self) weakSelf = self;
dispatch_async(dispatch_get_main_queue(), ^{
    __strong __typeof(weakSelf) strongSelf = weakSelf;
    UITextRange *range = [strongSelf textRangeFromPosition:strongSelf.beginningOfDocument toPosition:strongSelf.endOfDocument];
    [strongSelf setSelectedTextRange:range];
});

Thanks to Eric Baker ( just edited from comment in here )

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俏︾媚 2024-08-17 05:47:21

事实证明，使用非零发送者调用 -selectAll: 会显示菜单。用 nil 调用它会导致它选择文本，但不显示菜单。

在我从苹果返回有关它的错误报告并建议我传递 nil 而不是 self 后，我尝试了这个。

无需使用 UIMenuController 或其他选择 API。

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悲念泪 2024-08-17 05:47:21

使用您需要的

ObjC

[yourtextField becomeFirstResponder]; //puts cursor on text field
[yourtextField selectAll:nil];  //highlights text
[yourtextField selectAll:self]; //highlights text and shows menu(cut copy paste)

Swift

yourTextField.becomeFirstResponder() //puts cursor on text field
yourTextField.selectAll(nil)  //highlights text
yourTextField.selectAll(self) //highlights text and shows menu(cut copy paste)

Use what you need

ObjC

[yourtextField becomeFirstResponder]; //puts cursor on text field
[yourtextField selectAll:nil];  //highlights text
[yourtextField selectAll:self]; //highlights text and shows menu(cut copy paste)

Swift

yourTextField.becomeFirstResponder() //puts cursor on text field
yourTextField.selectAll(nil)  //highlights text
yourTextField.selectAll(self) //highlights text and shows menu(cut copy paste)

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摇划花蜜的午后 2024-08-17 05:47:21

我只是对此进行了测试以验证 Mirko 上面的评论，但我的测试验证了 selectAll: 实际上在发送到 UITextField 本身时选择了所有文本。

请注意，文本将立即被 CUT | 遮盖。复制|粘贴操作，但对于您的问题，这正是用户点击“全选”时首先出现的内容。

我要采用的解决方案如下，请注意，第二行将暂时隐藏“剪切/复制/粘贴”对话框，而不会针对显式用户选择禁用它

[_myTextField selectAll:self];
[UIMenuController sharedMenuController].menuVisible = NO;

I just tested this to verify Mirko's comment above, but my test verifies that selectAll: does in fact select all the text when it's sent to the UITextField itself.

Note that the text will be immediately obscured with CUT | COPY | PASTE actions, but to your question, it is exactly what appears when a user taps "Select All" to begin with.

The solution I'm going with follows, note that the second line will temporarily hide the CUT/COPY/PASTE dialog, without disabling it for explicit user selections

[_myTextField selectAll:self];
[UIMenuController sharedMenuController].menuVisible = NO;

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梦醒灬来后我 2024-08-17 05:47:21

这是我找到的最好的解决方案。没有sharedMenuController，它连续工作：

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
    [textField performSelector:@selector(selectAll:) withObject:nil afterDelay:0.1];
}

This is the best solution I've found. No sharedMenuController, and it works consecutively:

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
    [textField performSelector:@selector(selectAll:) withObject:nil afterDelay:0.1];
}

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长途伴 2024-08-17 05:47:21

Swift

选择 UITextField 中的所有文本：

textField.selectedTextRange = textField.textRange(from: textField.beginningOfDocument, to: textField.endOfDocument)

我的完整答案在这里：https: //stackoverflow.com/a/34922332/3681880

Swift

Select all text in a UITextField:

textField.selectedTextRange = textField.textRange(from: textField.beginningOfDocument, to: textField.endOfDocument)

My full answer is here: https://stackoverflow.com/a/34922332/3681880

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行雁书 2024-08-17 05:47:21

为了能够选择文本，文本字段必须是可编辑的。要知道文本字段何时可编辑，请使用委托方法：

- (void)textFieldDidBeginEditing:(UITextField *)textField
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

我不认为 textFieldShouldBeginEditing: 是必需的，但它是我在实现中使用的。

- (void)textFieldDidBeginEditing:(UITextField *)textField{
    [textField selectAll:textField];
}

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
    return YES;
}

将 nil 传递给 selectAll: 将不会显示菜单。

To be able to select text, the text field has to be editable. To know when the text field is editable use the delegate methods:

- (void)textFieldDidBeginEditing:(UITextField *)textField
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

I don't think textFieldShouldBeginEditing: is required but it's what I used in my implementation.

- (void)textFieldDidBeginEditing:(UITextField *)textField{
    [textField selectAll:textField];
}

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
    return YES;
}

Passing in nil to selectAll: won't show the Menu.

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旧夏天 2024-08-17 05:47:21

不幸的是我不认为你能做到这一点。

我不确定这是否对您有帮助，但是 setClearsOnBeginEditing 允许您指定 UITextField 应在用户开始编辑时删除现有值（这是安全 UITextField 的默认值）代码>UITextFields）。

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辞旧 2024-08-17 05:47:21

斯威夫特3：

textField.selectAll(self)

Swift 3:

textField.selectAll(self)

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隱形的亼 2024-08-17 05:47:21

我创建了一个自定义警报视图，其中包含一个 UITextField 。我发现文本字段的一个问题是： beginningOfDocument 仅当文本字段添加到屏幕时才有价值。调用 becomeFirstResponder。

否则 beginningOfDocument 返回 nil 并且 [UITextField textRangeFromPosition:] 无法获取该值。

这是我解决这种情况的示例代码。

UIWindow *window = [[[UIApplication sharedApplication] windows] firstObject];
[window addSubview:theAlertView]; // textfield must be added as a subview of screen first
UITextField *textField = theAlertView.textField;
[textField becomeFirstResponder]; // then call to show keyboard and cursor 
UITextRange *range = [textField textRangeFromPosition:textField.beginningOfDocument toPosition:textField.endOfDocument]; // at this time, we could get beginningOfDocument
[textField setSelectedTextRange:range]; // Finally, it works!!!

I create a custom alert view which contains a UITextField inside. I found a problem to the textfield is that: beginningOfDocument only has value if textfield is added to screen & becomeFirstResponder is called.

Otherwise beginningOfDocument returns nil and [UITextField textRangeFromPosition:] can not get the value.

So here is my sample code to solve this case.

UIWindow *window = [[[UIApplication sharedApplication] windows] firstObject];
[window addSubview:theAlertView]; // textfield must be added as a subview of screen first
UITextField *textField = theAlertView.textField;
[textField becomeFirstResponder]; // then call to show keyboard and cursor 
UITextRange *range = [textField textRangeFromPosition:textField.beginningOfDocument toPosition:textField.endOfDocument]; // at this time, we could get beginningOfDocument
[textField setSelectedTextRange:range]; // Finally, it works!!!

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酒解孤独 2024-08-17 05:47:21

UITextField *tf = yourTF;
// hide cursor (you have store default color!!!)
[[tf valueForKey:@"textInputTraits"] setValue:[UIColor clearColor]
                                       forKey:@"insertionPointColor"];
// enable selection
[tf selectAll:self];
// insert your string here
// and select nothing (!!!)
[tf setMarkedText:@"Egor"
    selectedRange:NSMakeRange(0, 0)];

完毕！

UITextField *tf = yourTF;
// hide cursor (you have store default color!!!)
[[tf valueForKey:@"textInputTraits"] setValue:[UIColor clearColor]
                                       forKey:@"insertionPointColor"];
// enable selection
[tf selectAll:self];
// insert your string here
// and select nothing (!!!)
[tf setMarkedText:@"Egor"
    selectedRange:NSMakeRange(0, 0)];

Done!

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