ios demo version

ios/Flutter/Flutter.framework/Headers/FlutterBinaryMessenger.h

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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_FLUTTERBINARYMESSENGER_H_
+#define FLUTTER_FLUTTERBINARYMESSENGER_H_
+
+#import <Foundation/Foundation.h>
+
+#include "FlutterMacros.h"
+
+NS_ASSUME_NONNULL_BEGIN
+/**
+ A message reply callback.
+
+ Used for submitting a binary reply back to a Flutter message sender. Also used
+ in the dual capacity for handling a binary message reply received from Flutter.
+
+ - Parameters:
+   - reply: The reply.
+ */
+typedef void (^FlutterBinaryReply)(NSData* _Nullable reply);
+
+/**
+ A strategy for handling incoming binary messages from Flutter and to send
+ asynchronous replies back to Flutter.
+
+ - Parameters:
+   - message: The message.
+   - reply: A callback for submitting a reply to the sender.
+ */
+typedef void (^FlutterBinaryMessageHandler)(NSData* _Nullable message, FlutterBinaryReply reply);
+
+/**
+ A facility for communicating with the Flutter side using asynchronous message
+ passing with binary messages.
+
+ - SeeAlso:
+   - `FlutterBasicMessageChannel`, which supports communication using structured
+ messages.
+   - `FlutterMethodChannel`, which supports communication using asynchronous
+ method calls.
+   - `FlutterEventChannel`, which supports commuication using event streams.
+ */
+FLUTTER_EXPORT
+@protocol FlutterBinaryMessenger<NSObject>
+/**
+ Sends a binary message to the Flutter side on the specified channel, expecting
+ no reply.
+
+ - Parameters:
+   - channel: The channel name.
+   - message: The message.
+ */
+- (void)sendOnChannel:(NSString*)channel message:(NSData* _Nullable)message;
+
+/**
+ Sends a binary message to the Flutter side on the specified channel, expecting
+ an asynchronous reply.
+
+ - Parameters:
+   - channel: The channel name.
+   - message: The message.
+   - callback: A callback for receiving a reply.
+ */
+- (void)sendOnChannel:(NSString*)channel
+              message:(NSData* _Nullable)message
+          binaryReply:(FlutterBinaryReply _Nullable)callback;
+
+/**
+ Registers a message handler for incoming binary messages from the Flutter side
+ on the specified channel.
+
+ Replaces any existing handler. Use a `nil` handler for unregistering the
+ existing handler.
+
+ - Parameters:
+   - channel: The channel name.
+   - handler: The message handler.
+ */
+- (void)setMessageHandlerOnChannel:(NSString*)channel
+              binaryMessageHandler:(FlutterBinaryMessageHandler _Nullable)handler;
+@end
+NS_ASSUME_NONNULL_END
+#endif  // FLUTTER_FLUTTERBINARYMESSENGER_H_