NSURLSession how-to

Question

我正在嘗試發送帖子請求來登錄服務。我曾與NSURLConnection工作，但後來發現它折舊，所以我試圖切換到NSURLSession，我不知道該怎麼做或爲什麼我的代碼不工作。請注意，出於安全原因，部分代碼被刪除。

-(NSString *)signIn:(NSString *)username password:(NSString *)password{ 
NSString *api_sig = [NSString stringWithFormat:@"%@methodauth.getMobileSessionpassword%@username%@thisismyapisignature", LASTFM_API_KEY, password, username];//API signature 

NSString *post = [NSString stringWithFormat:@"https://ws.audioscrobbler.com/2.0/?method=auth.getMobileSession&api_key=apikey&format=json&username=%@&password=%@&api_sig=%@", username, password, [api_sig md5]]; 

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:post] 
                 cachePolicy:NSURLRequestUseProtocolCachePolicy 
                timeoutInterval:60.0]; 

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

[request setHTTPMethod:@"POST"]; 
[request setHTTPBody:[post dataUsingEncoding:NSUTF8StringEncoding]]; 
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
    NSLog(@"response is %@", response); 
}]; 
[task resume]; 

if (session) { 
    NSLog(@"SUCESS"); 
}else{ 
    NSLog(@"FAILURE"); 
} 
return nil; 
} 

-(void)URLSession:(NSURLSession *)session dataTask: (NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data{ 
NSLog(@"data is %@", data); 
} 

我得到這個在控制檯

2015-12-24 15:04:35.624 [21173:761903] SUCESS 
2015-12-24 15:04:36.445 [21173:762056] response is <NSHTTPURLResponse: 0x7f8f3d0bd9d0> { URL: https://ws.audioscrobbler.com/2.0/?method=auth.getMobileSession&api_key=apikey&format=json&username=username&password=password&api_sig=apisig } { status code: 400, headers { 
"Access-Control-Allow-Methods" = "POST, GET, OPTIONS"; 
"Access-Control-Allow-Origin" = "*"; 
"Access-Control-Max-Age" = 86400; 
Connection = "keep-alive"; 
"Content-Length" = 58; 
"Content-Type" = "application/json"; 
Date = "Thu, 24 Dec 2015 15:04:35 GMT"; 
Server = "openresty/1.7.7.2"; 
} } 

Answer 1

這行代碼是不正確的崗位。

NSString *post = [NSString stringWithFormat:@"https://ws.audioscrobbler.com/2.0/?method=auth.getMobileSession&api_key=apikey&format=json&username=%@&password=%@&api_sig=%@", username, password, [api_sig md5]]; 

您應該將您的url與查詢分開，然後將查詢作爲數據發佈到主體。

喜歡的東西：

NSURL * url = [NSURL URLWithString:@"https://ws.audioscrobbler.com/2.0/"]; 
NSString * post = [NSString stringWithFormat:@"method=auth.getMobileSession&api_key=someapikey&format=json&username=%@&password=%@&api_sig=%@", username, password, [api_sig md5]]; 

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url 
                 cachePolicy:NSURLRequestUseProtocolCachePolicy 
                timeoutInterval:60.0];