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FlutterJSONMethodCodec Class Reference

`#import <FlutterCodecs.h>`

Inheritance diagram for FlutterJSONMethodCodec:

## Detailed Description

An arbitrarily large integer value, used with `FlutterStandardMessageCodec` and `FlutterStandardMethodCodec`. A codec for method calls and enveloped results.

Method calls are encoded as binary messages with enough structure that the codec can extract a method name `NSString` and an arguments `NSObject`, possibly `nil`. These data items are used to populate a `FlutterMethodCall`.

Result envelopes are encoded as binary messages with enough structure that the codec can determine whether the result was successful or an error. In the former case, the codec can extract the result `NSObject`, possibly `nil`. In the latter case, the codec can extract an error code `NSString`, a human-readable `NSString` error message (possibly `nil`), and a custom error details `NSObject`, possibly `nil`. These data items are used to populate a `FlutterError`. Provides access to a shared instance this codec.

Returns
  The shared instance. Encodes the specified method call into binary.

Parameters

  methodCall | The method call. The arguments value must be supported by this codec.

Returns
  The binary encoding. Decodes the specified method call from binary.

Parameters

  methodCall | The method call to decode.

Returns
  The decoded method call. Encodes the specified successful result into binary.

Parameters

  result | The result. Must be a value supported by this codec.

Returns
  The binary encoding. Encodes the specified error result into binary.

Parameters

  error | The error object. The error details value must be supported by this codec.

Returns
  The binary encoding. Deccodes the specified result envelope from binary.

Parameters

  envelope | The error object.

Returns
  The result value, if the envelope represented a successful result, or a `FlutterError` instance, if not. A `FlutterMethodCodec` using UTF-8 encoded JSON method calls and result envelopes.

This codec is guaranteed to be compatible with the corresponding JSONMethodCodec on the Dart side. These parts of the Flutter SDK are evolved synchronously.

Values supported as methods arguments and result payloads are those supported as top-level or leaf values by `FlutterJSONMessageCodec`.

Definition at line 455 of file FlutterCodecs.h.

The documentation for this class was generated from the following file:

- shell/platform/darwin/common/framework/Headers/FlutterCodecs.h