好的学习网址-慢慢更新 记录

swiftgg https://swift.gg/
flutter 中文网 https://flutterchina.club/

swift 文档 https://beeth0ven.github.io/RxSwift-Chinese-Documentation/

字典转为json字符串 https://www.cnblogs.com/jukaiit/p/9345654.html

 let data : NSData! = try? JSONSerialization.data(withJSONObject: dictionary, options: []) as NSData!
 let JSONString = NSString(data:data as Data,encoding: String.Encoding.utf8.rawValue)