ios - 如何在iOS中使用Flutter StandardMessageCodec写入/读取二进制数据？

Question

我可以使用这些类在 Android 和 Flutter 端使用此编解码器读取/写入二进制数据:

在 Flutter 方面:https://api.flutter.dev/flutter/services/StandardMessageCodec-class.html

Android端:https://github.com/flutter/engine/blob/master/shell/platform/android/io/flutter/plugin/common/StandardMessageCodec.java

但我找不到如何在 iOS 端将其用作独立类，而不是在平台 channel 的上下文中。我需要的只是写入一些数据并获取二进制表示(例如 NSDictionary -> NSData)，反之亦然。

Answer 1

回答我自己的问题。这很容易!

        // create and fill dictionary with data
        NSMutableDictionary *dict = [NSMutableDictionary dictionary];
        dict[@"string"] = @"string value";
        dict[@"null"] = [NSNull null];
        dict[@"int"] = @(1);
        // create codec
        FlutterStandardMessageCodec *codec = [FlutterStandardMessageCodec codecWithReaderWriter:[[FlutterStandardReaderWriter alloc] init]];
        // encode to binary
        NSData *binary = [codec encode:dict];
        // decode from binary
        dict = [codec decode:binary];
        // print
        NSLog(@"Decoded value: %@", dict);

输出:

Decoded value: {
    int = 1;
    null = "<null>";
    string = "string value";
}