【项目】Http请求在NSMutableURLRequest添加HttpBody的字典params属性

在请求头中加入字典集合的Body，首先把字典转换成json，然后json转换成NSData，然后加入到HTTPBody中，我有已下写法

// 参数paramsNSDictionary * params = @{@"Longitude":m_lng,
                          @"Latitude":m_lat,
                          @"TimeStamp":[NSNumber numberWithLong:m_num],
                          @"List":_ar_UserList};

NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:...]]

[request setHTTPMethod:@"POST"];

request.timeoutInterval        = HTTPTIMEOUT

第一种写法：

NSData * bodyData   = [NSJSONSerialization dataWithJSONObject:params options:NSJSONWritingPrettyPrinted error:nil];
NSString * jsonBody = [[NSString alloc] initWithData:bodyData encoding:NSUTF8StringEncoding];
[request setHTTPBody:[jsonBody dataUsingEncoding:NSUTF8StringEncoding]];

第二种写法：

NSData * bodyData = [NSJSONSerialization dataWithJSONObject:params options:NSJSONWritingPrettyPrinted error:nil];
[request setHTTPBody:bodyData];

当然如果你根据服务器请求需要设置一些请求头，例如：

[request setValue:urlPath(@"Bearer ", access_Token) forHTTPHeaderField:@"Authorization"]; // token
[request setValue:@"application/json" forHTTPHeaderField:@"content-type"];  // content-type类型

你还可以通过以下代码，打印出你request的详情：

NSLog(@"---\n%@",jsonBody); // params字典
NSLog(@"\n%@",request.HTTPBody);  // NSData二进制
NSLog(@"\n%@",request.allHTTPHeaderFields); // 一个请求头字典

最后最后，如果你是用的是AFNetworking，这样写ok啦

AFHTTPRequestOperation * operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation * _Nonnull operation, id  _Nonnull responseObject)
{
      completion(responseObject);
} failure:^(AFHTTPRequestOperation * _Nonnull operation, NSError * _Nonnull error)
{
      failure(error);
}];
[operation start];