afnetworking 3.0 How to POST with headers and HTTP Body

转自：http://www.jianshu.com/p/6a61812aedd2

一般请求的话是这样

     AFHTTPSessionManager *session = [AFHTTPSessionManager manager];    session.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html", nil];    [session POST:@"" parameters:@"" progress:nil success:nil failure:nil];

但是今天遇到个不管怎么样parameters都传不到服务器那边，而后台那边给我的解释是传输用[request setHTTPBody:data];
而 afn 2.0 是这样的

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]];[request setHTTPMethod:@"POST"];[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];NSError *error;NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters   options:0     error:&error];NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];// And finally, add it to HTTP body and job done.[request setHTTPBody:[jsonString dataUsingEncoding:NSUTF8StringEncoding]];AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];manager.requestSerializer.timeoutInterval=[[[NSUserDefaults standardUserDefaults] valueForKey:@"timeoutInterval"] longValue];manager.requestSerializer = [AFJSONRequestSerializer serializer];AFHTTPRequestOperation *operation = [manager HTTPRequestOperationWithRequest:request progress:nil success:^(NSURLSessionTask *task, id responseObject) {    NSLog(@"Reply JSON: %@", responseObject);    }} failure:^(NSURLSessionTask *operation, NSError *error) {    NSLog(@"Error: %@, %@, %@, %@, %@", error, operation.responseObject, operation.responseData, operation.responseString, operation.request);}];[operation start];

但是3.0弃用了AFHTTPRequestOperationManager,那么怎么才能用呢？
1.用系统NSURLConnection 请求

      NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"url"]];        [request setHTTPBody:data];        [request setHTTPMethod:@"POST"];        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];        NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];        if (theConnection) {            NSLog(@"connected");            receivedData=[[NSMutableData alloc]init];        } else {            NSLog(@"not connected");        }-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{    [receivedData setLength:0];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    [receivedData appendData:data];    NSString* responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    NSLog(@"response: %@",responseString);}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{    NSLog(@"Succeeded! Received %lu data",(unsigned long)[receivedData length]);    NSString* responseString = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding];    NSLog(@"response: %@",responseString);    NSError *myError = nil;    NSDictionary *res = [NSJSONSerialization JSONObjectWithData:receivedData options:NSJSONReadingMutableLeaves error:&myError];    NSLog(@"%@",res);}

2.用不习惯系统没关系，其实afn3.0 也有提供api给我们调用，但是这个是我一直没接触过的AFURLSessionManager。

 AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];    NSMutableURLRequest *req = [[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:@"url" parameters:nil error:nil];    req.timeoutInterval= [[[NSUserDefaults standardUserDefaults] valueForKey:@"timeoutInterval"] longValue];    [req setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];    [req setValue:@"application/json" forHTTPHeaderField:@"Accept"];    [req setHTTPBody:da];    [[manager dataTaskWithRequest:req completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {        if (!error) {            NSLog(@"Reply JSON: %@", responseObject);        } else {            NSLog(@"Error: %@, %@, %@", error, response, responseObject);        }    }] resume];