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Question

多行聊天输入有问题。当用户输入聊天内容时，输入内容应位于“容器”的中央。但是事实并非如此，我无法通过填充进行修复。

这是代码：

Container(
            width: screenWidth - 130.0,
            height: 30.0,
            padding: EdgeInsets.fromLTRB(8.0, 0.0, 8.0, 0.0),
            decoration: BoxDecoration(
                color: Colors.grey[200],
                borderRadius: BorderRadius.circular(15.0)),
            child: new ConstrainedBox(
              constraints: BoxConstraints(maxHeight: 300.0),
              child: ScrollConfiguration(
                behavior: DisableScrollGlow(),
                child: new Scrollbar(
                  child: new SingleChildScrollView(
                    scrollDirection: Axis.vertical,
                    reverse: true,
                    child: Center(
                      child: new TextField(
                        keyboardType: TextInputType.text,
                        autofocus: true,
                        maxLines: null,
                        controller: _messageController,
                        decoration: InputDecoration(
                            contentPadding:
                            EdgeInsets.only(left: 0, bottom: 0.0, top: 0.0, right: 0),
                            enabledBorder: InputBorder.none,
                            errorBorder: InputBorder.none,
                            disabledBorder: InputBorder.none,
                            border: InputBorder.none,
                            focusedBorder: InputBorder.none),
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),

欢迎所有帮助

Answer 1

像这样将textAlign设置为TextAlign.center：

TextField(
  keyboardType: TextInputType.text,
  autofocus: true,
  maxLines: null,
  controller: controller,
  textAlign: TextAlign.center,
  decoration: InputDecoration(
    contentPadding:
    EdgeInsets.only(left: 0, bottom: 0.0, top: 0.0, right: 0),
    enabledBorder: InputBorder.none,
    errorBorder: InputBorder.none,
    disabledBorder: InputBorder.none,
    border: InputBorder.none,
    focusedBorder: InputBorder.none),
),

Answer 2

在“文本字段修饰”中，保持密度等于true

isDense : true

，然后在内容填充中添加

contentPadding: EdgeInsets.only(left: 0, bottom: 5, top: 0.0, right: 0),

Answer 3

Sir_Joan_the_third，您好，

我不知道为什么要在所选的小部件中创建TextField，但是当我尝试改进代码时，当输入更改为多行时出现问题。这就是为什么我编码TextField而不使用您使用的小部件的原因。使用此代码，文本可以居中对齐，并且多行没有问题。

import 'package:flutter/material.dart';

class TempTest extends StatefulWidget {
  @override
  _TempTestState createState() => _TempTestState();
}

class _TempTestState extends State<TempTest> {
  TextEditingController _messageController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(10.0),
        child: Center(
          child: ListTile(
            leading: IconButton(
                icon: Icon(Icons.image), onPressed: () => print('add photo')),
            trailing: IconButton(
                icon: Icon(Icons.send), onPressed: () => print('send text')),
            title: TextField(
              keyboardType: TextInputType.text,
              autofocus: true,
              maxLines: null,
              controller: _messageController,
              decoration: InputDecoration(
                isDense: true,
                contentPadding:
                    EdgeInsets.only(left: 0, bottom: 0.0, top: 0.0, right: 0),
                border: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(30),
                  borderSide: BorderSide(width: 0, style: BorderStyle.none),
                ),
                filled: true,
              ),
            ),
          ),
        ),
      ),
    );
  }
}

使用ListTile的结果：（没有密集属性）

更新

要最大程度地减少TextField中单词的填充，请尝试isDense=true中的TextField属性，并将contentPadding设置为0。主要就像Alex Collette写道他的答案。

应该看起来像这样

具有以下代码

import 'package:flutter/material.dart';

class SmallInputField extends StatefulWidget {
  @override
  _SmallInputFieldState createState() => _SmallInputFieldState();
}

class _SmallInputFieldState extends State<SmallInputField> {
  TextEditingController _messageController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(10.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisAlignment: MainAxisAlignment.end,
          children: <Widget>[
            Material(
              elevation: 5.0,
              borderRadius: BorderRadius.only(
                topLeft: Radius.circular(1.0),
                topRight: Radius.circular(10.0),
                bottomLeft: Radius.circular(10.0),
                bottomRight: Radius.circular(10.0),
              ),
              child: Padding(
                padding: const EdgeInsets.symmetric(
                    vertical: 10.0, horizontal: 20.0),
                child: Text('anger',
                    style: TextStyle(fontSize: 20.0, color: Colors.black87)),
              ),
            ),
            ListTile(
              dense: true,
              contentPadding: EdgeInsets.all(0),
              leading: IconButton(
                  constraints: BoxConstraints(maxHeight: 24),
                  padding: EdgeInsets.all(0),
                  icon: Icon(Icons.image),
                  onPressed: () => print('add photo')),
              trailing: IconButton(
                  constraints: BoxConstraints(maxHeight: 24),
                  padding: EdgeInsets.all(0),
                  icon: Icon(Icons.send),
                  onPressed: () => print('send text')),
              title: TextField(
                style: TextStyle(fontSize: 24),
                keyboardType: TextInputType.text,
                autofocus: true,
                maxLines: null,
                controller: _messageController,
                decoration: InputDecoration(
                  isDense: true,
                  labelStyle: TextStyle(fontSize: 20),
                  contentPadding:
                      EdgeInsets.only(left: 10, bottom: 0, top: 0.0, right: 0),
                  border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(30),
                    borderSide: BorderSide(width: 0, style: BorderStyle.none),
                  ),
                  filled: true,
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

textformfield的Flutter问题，输入未居中

3 个答案:

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