NSURLSession *session = [NSURLSession sharedSession];

//根据会话对象创建task

NSURL *url = [NSURL URLWithString:@"http://base.api.owl361.com/app/user/syslogin"];

//创建可变的请求对象

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

//修改请求方法为POST

request.HTTPMethod = @"POST";

//设置请求体

NSDictionary * headerD = @{@"version":@"1.0",@"sign":@"",@"tokenid":@"123",@"sign_t":@"0",@"tag":@"123",@"from":@"300"};

NSData * headerData = [NSJSONSerialization dataWithJSONObject:headerD options:0 error:nil];

NSString * headerStr = [[NSString alloc]initWithData:headerData encoding:NSUTF8StringEncoding];

[request setValue:headerStr forHTTPHeaderField:@"rqs-header"];

NSDictionary * bodyDic = @{@"verifycode":@"123",@"username":parm[@"nameText"],@"password":parm[@"rsa"]};

NSData * bodyData = [NSJSONSerialization dataWithJSONObject:bodyDic options:0 error:nil];

NSString * bodyStr = [[NSString alloc]initWithData:bodyData encoding:NSUTF8StringEncoding];

request.HTTPBody = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];

//根据会话对象创建一个Task(发送请求）

NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

//解析数据

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];

NSLog(@"%@",dict);

}];

//执行任务

[dataTask resume];