如何使用 post 方法发布字典和数组服务器

Posted 2023-02-22

【中文标题】如何使用 post 方法发布字典和数组服务器

【英文标题】：how to post dictionary and array server using post mathods

【发布时间】：2015-05-02 19:22:41

【问题描述】：

如何发布 json 服务器我正在尝试添加字典和发布数据但没有收到写入响应

"类型":"一般", "noteText":["lineNo":"1","lineText":"患者入院"]

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];

NSString *Str = @"general";
  NSString *St2r = @"Yogesh";
NSString *Str1 = @"1";

NSMutableArray *tempArray = [[NSMutableArray alloc]init];

NSDictionary *tempDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
                               Str1, @"lineNo",
                             St2r, @"lineText",
                                nil];
[tempArray addObject:tempDictionary];

NSDictionary *tempDict = [[NSDictionary alloc]initWithObjectsAndKeys:tempArray,@"noteText", nil];
NSError *error;

NSData *postData = [NSJSONSerialization dataWithJSONObject:tempDict options:0 error:&error];

//[请求设置HTTPBody:postData];

NSString *jsonRequest = [NSString stringWithFormat:@"\"type\":\"%@\"",Str]; // NSLog(@"Request: %@", jsonRequest);

NSURL *url7 = [NSURL URLWithString:@"URl"];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url7];
NSData *requestData = [NSData dataWithBytes:[jsonRequest UTF8String] length:[jsonRequest length]];
[request setHTTPBody:postData];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody: requestData];


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



    if(error == nil)
    
        NSString * text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
        NSLog(@"Data = %@",text);
    

];

【问题讨论】：

发布一些代码你是怎么做到的？？？？

[postDataTask resume]; 在哪里？将其添加到 dataTaskWithRequest 的末尾。

我也对这些行感到困惑：[request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"]; 和 [request setHTTPBody: requestData]; 你为什么使用 requestData？ [request setHTTPBody:postData];就够了，然后在请求中加上postData content-length：

你应该使用 AFNetworking 库：github.com/AFNetworking/AFNetworking

【参考方案1】：

也许考虑使用 AFNetworking？

您可以从here下载代码

使用以下代码作为对服务器的后调用示例。

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *parameters = @@"foo": @"bar";
[manager POST:@"http://example.com/resources.json" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) 
    NSLog(@"JSON: %@", responseObject);
 failure:^(AFHTTPRequestOperation *operation, NSError *error) 
    NSLog(@"Error: %@", error);
];