jonathan_joestar的博客

flutter mqttimport 'dart:ui';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:mqtt_client/mqtt_client.dart';import 'audio.dart';import 'mqtt/client.dart';import 'mqtt/message.dart';import 'dialog.dart';

学习audioplayers的时候，想要暂停audiocache的播放，找到了这篇https://medium.com/@pongpiraupra/a-comprehensive-guide-to-playing-local-mp3-files-with-seek-functionality-in-flutter-7730a453bb1a关于他的这句AudioPlayer advancedPlayer = new AudioPlayer();AudioCache audioCache = new A

原因是原因是定义一个widget的时候没有return

Widget btnCircle(){ return SizedBox( height: 50, width: 50, child:RaisedButton( child: Text('圆形按钮' ), onPressed: () { print('我很圆'); Text('我很圆'); }, shape: CircleBorder(), )); .