flutter TextTheme display1被废弃用什么代替
时间: 2024-02-05 16:10:32 浏览: 19
在Flutter中,`TextTheme`中的`display1`样式已被废弃,可以用`headline5`或`subtitle1`来代替。具体取决于您想要的字体大小、样式和用途。以下是一个示例:
```dart
Text(
'Example Text',
style: Theme.of(context).textTheme.headline5,
),
```
```dart
Text(
'Example Text',
style: Theme.of(context).textTheme.subtitle1,
),
```
相关问题
flutter TextTheme display1
In Flutter, `TextTheme` is used to define the styles for text in your app. `display1` is one of the predefined styles available in `TextTheme`.
`display1` is typically used for large, prominent headlines or titles in your app. It has a bold weight and a relatively large font size compared to other styles.
Here is an example of how to use `display1` in Flutter:
```
Text(
'Welcome to My App',
style: Theme.of(context).textTheme.display1,
)
```
This will display the text "Welcome to My App" in the `display1` style specified by the current theme.
flutter FormData.from方法被废弃了用什么代替
Flutter中的FormData.from方法已经被废弃,可以使用MultipartRequest来代替。MultipartRequest可以用来构建多部分HTTP请求,其中包含文件和文本数据。
下面是一个示例:
```
import 'dart:io';
import 'package:http/http.dart' as http;
Future<http.Response> uploadFile(File file, String url) async {
var request = http.MultipartRequest('POST', Uri.parse(url));
request.files.add(await http.MultipartFile.fromPath('file', file.path));
var response = await request.send();
return http.Response.fromStream(response);
}
```
在上面的示例中,我们可以看到如何使用MultipartRequest来上传一个文件。我们定义了一个名为uploadFile的异步函数,它接受一个文件和一个URL作为参数。在函数体内,我们创建了一个MultipartRequest对象,设置请求的方法为POST,然后将文件添加到请求的文件列表中。最后,我们使用send方法发送请求,并将响应转换为http.Response对象。