发送到 http post 和设置实体时 IOS Json 错误

Question

您好，我正在向服务器发送一个 http post 请求，我所指的 java 代码有一个方法作为 post 请求中的设置实体。我怎样才能在 iOS 中实现这一目标。

我目前正在将要发送的 json 数据放入正文中，但收到错误

Error 500 Cannot read request parameters due Invalid parameter, expected to be a pair

但是

{
  "chatMessage" : {
    "reportRequest" : "Sent",
    "text" : "wdfsds acd"
}

我的代码是

NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:[var.projectUsername base64EncodedString] forHTTPHeaderField:@"Authorization"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPShouldHandleCookies:YES];
   NSMutableDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:messageText.text,@"text",@"Sent",@"reportRequest",nil];
NSDictionary *dictionary1 = [NSDictionary dictionaryWithObjectsAndKeys:dictionary,@"chatMessage", nil];
     NSError *error = nil;
NSData* jsonData = [NSJSONSerialization dataWithJSONObject:dictionary1  options:NSJSONWritingPrettyPrinted error:&error];



[request setHTTPBody:jsonData];

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];

Answer 1

在您的代码中添加:-
[request setValue:@"application/json"for HTTPHeaderField:@"Content-Type"];