dart 如何在Flutter中限制文本字段的表情符号？

i1icjdpr  于 2023-07-31  发布在  Flutter
关注(0)|答案(7)|浏览(1520)

你好，我正在寻找限制表情符号正则表达式或输入格式的Flutter。我想在文本字段禁用表情符号，如果有人有想法，那么请帮助我。先谢了。

dart

7条答案

按热度按时间
wqlqzqxt

wqlqzqxt1#

@magicleon94几乎回答了你的问题，但我认为我的答案值得一提，而不是限制不需要的表情符号（其中集合是无限的），只允许所需的输入字符（其中集合是有限的）。幸运的是，我们在flutter中内置了一个输入格式化程序，所以我们不必编写它，它叫做WhitelistingTextInputFormatter()
然后简单地像这样使用它
@弃用

inputFormatters: [new WhitelistingTextInputFormatter(RegExp("[a-zA-Z]")),],

字符串
在flutter v1.20.0-1.0.pre之后，上述“WhitelistingTextInputFormatter”已被弃用，不应使用。代替使用

inputFormatters: [ FilteringTextInputFormatter.allow(RegExp("[a-zA-Z]")),],

型

  • 上述输入格式化程序只允许在输入字段中使用字母，并限制所有表情符号，相信我：）*
赞(0）分享  回复(0）举报  2023-07-31
nkhmeac6

nkhmeac62#

更新
这是不正确的，因为它也排除了一些符号

这个格式化程序应该这样做：

BlacklistingTextInputFormatter(
  RegExp(
    r'(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])'
  ),
),

字符串
抱歉这里的格式不好！

赞(0）分享  回复(0）举报  2023-07-31
7uhlpewt

7uhlpewt3#

我不能使用空间，如果使用马赫什的答案在iOS模拟器，我不知道为什么。所以我修改了马赫什回答

var regexToRemoveEmoji =
    '   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字符串
这就是正则表达式，你可以把它保存在单独的文件中，然后像这样在文本字段中使用它

TextField(
   inputFormatters: [FilteringTextInputFormatter.deny(RegExp(regexToRemoveEmoji))], 
),

型

赞(0）分享  回复(0）举报  2023-07-31
6kkfgxo0

6kkfgxo04#

在我的例子中，我只需要字母和数字，所以我创建了一个regexp来接受：

final RegExp alphanumericRegex = RegExp(r'^[a-zA-Z0-9]+$');

字符串
TextField将是：

TextField(
  controller: _textEditingController,
  decoration: InputDecoration(
    hintText: 'Enter text with numbers and letters only',
    errorText: _validateInput(_textEditingController.text),
  ),
  inputFormatters: [
    FilteringTextInputFormatter.allow(_alphanumericRegex),
  ],
),

型

赞(0）分享  回复(0）举报  2023-07-31
yzuktlbb

yzuktlbb5#

尝试使用下面的代码，它将限制所有表情符号。

inputFormatters: [ FilteringTextInputFormatter.deny(RegExp('(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])'))],

字符串

赞(0）分享  回复(0）举报  2023-07-31
3qpi33ja

3qpi33ja6#

尝试使用remove_emoji_input_formatter。对我很有效！

import 'package:remove_emoji_input_formatter/remove_emoji_input_formatter.dart';

TextField(
  decoration: const InputDecoration(
    label: Text('Username')
  ),
  inputFormatters: [
    RemoveEmojiInputFormatter()
  ],
)

字符串

赞(0）分享  回复(0）举报  2023-07-31
cu6pst1q

cu6pst1q7#

使用remove_emoji_input_formatter解决此问题。

import 'package:remove_emoji_input_formatter/remove_emoji_input_formatter.dart';

TextField(
  decoration: const InputDecoration(
    label: Text('Username')
  ),
  inputFormatters: [
    RemoveEmojiInputFormatter()
  ],
)

字符串

赞(0）分享  回复(0）举报  2023-07-31
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