如何将NSURLConnection更改为Objective C中的NSURLSession？

Question

我是iOS的新手。我在将应用程序提交给Apple Store时遇到了IPv6错误。我的代码是这样的

-(void)serverconnection{ 


    NSString *soapMessage = [NSString stringWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?>" 
          "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" 
          "<soap:Body>" 
          "<Method Name xmlns=\"http://tempuri.org/\">" 
          "<UserId>%@</UserId>" 
          "</Method Name>" 
          "</soap:Body>" 
          "</soap:Envelope>",userid]; 




    NSURL *myNSUObj=[NSURL URLWithString:@"URL/webservice.asmx?op=MethodName"]; 
    // NSURLRequest *myNSURequestObj=[NSURLRequest requestWithURL:myNSUObj]; 

    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:myNSUObj]; 
    NSString *msgLength = [NSString stringWithFormat:@"%lu", (unsigned long)[soapMessage length]]; 

    [theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"]; 
    [theRequest addValue: @"http://tempuri.org/MethodName" forHTTPHeaderField:@"SOAPAction"]; 
    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"]; 
    [theRequest setHTTPMethod:@"POST"]; 
    [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]]; 

    myNSUConnectionObj=[[NSURLConnection alloc]initWithRequest:theRequest delegate:self]; 
    NSLog(@"Data =%@",myNSUConnectionObj); 
    if(myNSUConnectionObj) 
    { 

     NSLog(@"successful connection"); 
     myNSMDataFromServer=[[NSMutableData alloc]init]; 
    } 
} 

#pragma mark - NSURLConnection Delegate 

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ 

    [myNSMDataFromServer setLength:0]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ 

    [myNSMDataFromServer appendData:data]; 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection{ 

    NSXMLParser *myNSXMLParserObj=[[NSXMLParser alloc]initWithData:myNSMDataFromServer]; 
    myNSXMLParserObj.delegate=self; 
    [myNSXMLParserObj parse]; 
    NSLog(@"%@",myNSXMLParserObj.parserError); 
    NSLog(@"DataArray: %@",myDataNSMArray); 

    Keyarry=[responsedict valueForKey:@"Key"]; 
    NSLog(@"Assign Count =%@",Keyarry); 
    NSString *string = [NSString stringWithFormat:@"%@", [Keyarry objectAtIndex:0]]; 
    NSLog(@"String value =%@",string); 
    ibtassigncountlbl.text =string; 

    } 

#pragma mark - NSXMLParsing Delegate 

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict 
{ 
    if([elementName isEqualToString:@"FillBlocksNew"]) 
    { 
     myDataClassObj=[[mydata alloc]init]; 
    } 
} 

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string 
{ 

    myMutableStringObj=[[NSMutableString alloc]initWithString:string]; 
    NSLog(@"Array String: %@",myMutableStringObj); 
    NSData *data = [myMutableStringObj dataUsingEncoding:NSUTF8StringEncoding]; 
    responsedict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; 
    NSLog(@"JSON DATA = %@",responsedict); 
} 

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName 
{ 
    NSLog(@"DataArray: %@",myDataNSMArray); 
} 

我的问题是什么样的委托使用在NSURLSessionDataDelegatedidFinishLoading。

当我下面使用该委托：

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task connectionDidFinishLoading:(NSURLConnection *)conn { }

它表明我的错误。苹果建议我需要从NSURLConnectionDataDelegate更改为NSURLSessionDataDelegate。

Answer 1

NSURLConnection方法与IPv6兼容。无需将其更改为支持IPv6。我认为问题在于你的网址。在您的应用程序的某处，您可能使用了像（w.x.y.z）这样的硬编码IPv4地址。使用适当的域名删除这些地址，应用程序将通过。

你也应该使用最新的Rachability类。

Answer 2

基本上delegate方法被用来创建两个类之间的连接，以便当请求一个url尤斯NSURLRequest它使连接到NSURLConnection类，其处理请求url所述特定的时间和明智地响应的delegate方法。

而NSURLConnection两种方法，发出信号请求已完成（NSURLConnectionDataDelegate - connectionDidFinishLoading：和NSURLConnectionDelegate -connection：didFailWithError :)。两种方法都表示特定请求的完成。

现在没有什么不对，使用NSURLConnection你只需要确保你的URL和使用delegate方法以正确的方式见下文。

#pragma mark - 
#pragma mark - NSURLConnection Delegate Methods 
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 
    [webData setLength:0]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ 
    if(!webData){ 
     webData = [[NSMutableData alloc] init]; 
    } 
    [webData appendData:data]; 
} 

-(void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    NSString *returnString = [[NSString alloc] initWithData:webData encoding:NSUTF8StringEncoding]; 
    NSLog(@"response = %@",returnString); 
}