// 版本对象 class VersionModel { String title; // 标题 String content; //新版本说明 String url; // 版本下载地址 String version; // 版本号 VersionModel({this.title, this.content, this.url, this.version}); VersionModel.fromJson(Map<String, dynamic> json) : title = json['title'], content = json['content'], url = json['url'], version = json['version']; Map<String, dynamic> toJson() => { 'title': title, 'content': content, 'url': url, 'version': version, }; @override String toString() { StringBuffer sb = new StringBuffer('{'); sb.write("\"title\":\"$title\""); sb.write(",\"content\":\"$content\""); sb.write(",\"url\":\"$url\""); sb.write(",\"version\":\"$version\""); sb.write('}'); return sb.toString(); } }