GRPC是一个高性能、通用的开源RPC框架，基于HTTP/2协议标准和Protobuf序列化协议开发，支持众多的开发语言。。。更多介绍

编写Proto(asset.proto)(这里使用server写的没有自己写)

syntax = "proto3";

option java_multiple_files = true;
option java_package = "io.grpc.examples.proto.asset";
option java_outer_classname = "AssetProto";

package nameservers;

// 定义服务
service AssetService {
  // 服务中的方法，以流的方式返回
  rpc getAsset (User) returns (stream Asset) {
  }
}

message User {
  string account = 1;
}

message Asset {
  string account=1;
  int64 cash = 2;
  int64 timestamp = 3;
}

编写Podspec:

Pod::Spec.new do |s|
  s.name     = "GRPCDemo"
  s.version  = "0.0.1"
  s.license  = "Apache License, Version 2.0"
  s.authors  = { 'gRPC contributors' => 'grpc-io@googlegroups.com' }
  s.homepage = "https://grpc.io/"
  s.summary = "GRPCDemo example"
  s.source = { :git => 'https://github.com/grpc/grpc.git' }

  s.ios.deployment_target = "7.1"
  s.osx.deployment_target = "10.9"

  # Base directory where the .proto files are.
  src = "./protos/"

  # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0"

  # Pods directory corresponding to this app's Podfile, relative to the location of this podspec.
  pods_root = 'Pods'

  # Path where Cocoapods downloads protoc and the gRPC plugin.
  protoc_dir = "#{pods_root}/!ProtoCompiler"
  protoc = "#{protoc_dir}/protoc"
  plugin = "#{pods_root}/!ProtoCompiler-gRPCPlugin/grpc_objective_c_plugin"

  # Directory where the generated files will be placed.
  dir = "#{pods_root}/#{s.name}"

  s.prepare_command = <<-CMD
    mkdir -p #{dir}
    #{protoc} 
        --plugin=protoc-gen-grpc=#{plugin} 
        --objc_out=#{dir} 
        --grpc_out=#{dir} 
        -I #{src} 
        -I #{protoc_dir} 
        #{src}/*.proto
  CMD

  # Files generated by protoc
  s.subspec "asset" do |ms|
    ms.source_files = "#{dir}/*.pbobjc.{h,m}", "#{dir}/**/*.pbobjc.{h,m}"
    ms.header_mappings_dir = dir
    ms.requires_arc = false
    # The generated files depend on the protobuf runtime.
    ms.dependency "Protobuf"
  end

  # Files generated by the gRPC plugin
  s.subspec "Services" do |ss|
    ss.source_files = "#{dir}/*.pbrpc.{h,m}", "#{dir}/**/*.pbrpc.{h,m}"
    ss.header_mappings_dir = dir
    ss.requires_arc = true
    # The generated files depend on the gRPC runtime, and on the files generated by protoc.
    ss.dependency "gRPC-ProtoRPC"
    ss.dependency "#{s.name}/Messages"
  end

  s.pod_target_xcconfig = {
    # This is needed by all pods that depend on Protobuf:
    'GCC_PREPROCESSOR_DEFINITIONS' => '$(inherited) GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS=1',
    # This is needed by all pods that depend on gRPC-RxLibrary:
    'CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES' => 'YES',
  }
end

Podfile:

platform :ios, '8.0'

target 'GRPCDemo' do

inhibit_all_warnings! #屏蔽所有warning



pod 'gRPC'
pod 'GRPCDemo', :path => '.'


use_frameworks!
end

pod intall

引入头文件*.pbobjc.h *.pbrpc.h

Asset demo 使用:

 User *user = [[User alloc] init];
 user.account = @"";

 // 服务中的方法，以流的方式返回
 [service getAssetWithRequest:user eventHandler:^(BOOL done, Asset * _Nullable response, NSError * _Nullable error) {
    if (error) {
         NSLog(@"%@", error);
    }
        
    if (response) {
        NSLog(@"%lld", response.cash);
    }
 }];

点击直达demo

server demo

扩展：

swift GRPC

OAuth2 on gRPC - Objective-C