protobuf3 iOS 接入 protobuf

1.引入官方基础pod

谷歌将protobuf需要使用的基础类封装成了一个pod,因此可以直接安装该pod,不必再手工导入. 
如下: 
pod "Protobuf", :git => "https://github.com/google/protobuf.git" 
之所以设置git路径,是因为这样pod ‘Protobuf’, ‘~> 3.1.0’一直没有下载下来,所以直接使用了官网路径.

2.下载生成代码工具

a.安装protoc: brew install –devel protobuf 如果出现了下面的版本号,说明安装成功 ➜ ~ protoc --version libprotoc 3.0.0 关于protoc工具的使用请参考 https://developers.google.com/protocol-buffers/docs/proto3

b.另外一个方法是直接从github下载,自己编译一个protoc 链接:https://github.com/google/protobuf/tree/master/objectivec.编译完成后, 
在protobuf/src下可以找到该工具

3.定义数据模型

syntax = "proto3";
package tutorial;
message SearchResponse {
  repeated Result results = ;
}

message Result {
  string url = ;
  string title = ;
  repeated string snippets = ;
}

将以上数据保存到Test.proto的文件中.

生成代码的命令为: 
protoc –objc_out=tmp Test.proto 
最后一个参数是定义的数据模型,生成的代码会写入objc_out对应的文件夹内.注意是两个短横杠

4.简单使用

1. 直接将生成的代码拖入1创建的项目中,
2. import相关头文件
3. protobuf为了性能考虑,创建的都是mrc文件,因此在build phrases ->Compile 
   sources中给拖入的文件添加 -fno-objc-arc的标志

Result *res = [[Result alloc] init];
    res.title = @"";
    NSLog(@"%@",res.description);

    //序列化
    NSData *data = [res data];

    //反序列化
    NSError *error;
    Result *res1 = [[Result alloc] initWithData:data error:&error];
    NSLog(@"%@",res1.description);

post请求：

- (void)protoPost {
    // 设置请求体
    BidRequest * bidRequest = [[BidRequest alloc] init];
    bidRequest.bid = @"bid";
    bidRequest.version = @"version";

    BidRequest_BidUserInfo * bidUserInfo = [[BidRequest_BidUserInfo alloc] init];
    bidUserInfo.ip = @"ip";
    bidRequest.bidUserInfo = bidUserInfo;

    BidRequest_BidAppInfo * bidAppInfo = [[BidRequest_BidAppInfo alloc] init];
    bidAppInfo.appId = @"appId";
    bidAppInfo.appName = @"appName";
    bidRequest.bidAppInfo = bidAppInfo;

    BidRequest_BidAdSlotInfo * bidAdSlotInfo = [[BidRequest_BidAdSlotInfo alloc] init];
    bidAdSlotInfo.slotId = @"slotId";
    bidAdSlotInfo.width = ;
    bidAdSlotInfo.height = ;
    bidRequest.bidAdSlotInfo = bidAdSlotInfo;

    self.myData = [bidRequest data];

    NSURL * url = [NSURL URLWithString:@"http://192.168.10.45:9988/unioncast-ssp-manager/bidding/ssp/process"];
    NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url];
    request.timeoutInterval = ;
    request.HTTPMethod = @"POST";
    request.HTTPBody = self.myData;
    [request setValue:@"application/protobuf" forHTTPHeaderField:@"Content-Type"];
    NSURLSession * session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    NSURLSessionDataTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error) {
            NSLog(@"error = %@",error);
            return;
        } else {
            NSLog(@"------ data = %@",data);
            NSLog(@"success");
            // 返回的数据
            BidRequest * bidRequest = [BidRequest parseFromData:data error:nil];
            NSLog(@"=====%@",bidRequest.description);
            NSString * result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

            NSLog(@"%@",result);
        }
    }];
    [task resume];
}