ios - objective-c 在发送到 web 服务后卡住

Question

我非常努力地编写了一个 iPad 应用程序，它拍摄了 3 张照片并将它们发送到 .net soap 网络服务。它可以正确发送照片，我可以在我的服务器中看到它们。但问题是当我点击发送按钮时，按钮保持蓝色(点击效果)并且应用程序卡住。

我认为我在将照片发送到网络服务时做错了。我也在做所有发布的事情。

请看一下我的代码，告诉我哪里做错了。

- (IBAction)buttonClick:(id)sender {
recordResults = FALSE;

datax = UIImageJPEGRepresentation(u1,0.6);
resultx = [datax base64Encoding];

datax2 = UIImageJPEGRepresentation(u2,0.6);
resultx2 = [datax2 base64Encoding];

datax3 = UIImageJPEGRepresentation(u3,0.6);
resultx3 = [datax3 base64Encoding];


NSString *soapMessage = [NSString stringWithFormat:
                         @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
                         "<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/\">\n"
                         "<soap:Body>\n"
                         "<SendData xmlns=\"http://tempuri.org/\">\n"
                         "<containerId>%@</containerId>"
                         "<date_>%@</date_>"
                         "<image1>%@</image1>"
                         "<image2>%@</image2>"
                         "<image3>%@</image3>"
                         "<question1>%@</question1>"
                         "<question2>%@</question2>"
                         "<question3>%@</question3>"
                         "<question4>%@</question4>"
                         "<question5>%@</question5>"
                         "<question6>%@</question6>"
                         "<notes>%@</notes>"
                         "<transDate>%@</transDate>"
                         "<userId>%@</userId>"
                         "<macId>%@</macId>"
                         "<sFileID>%@</sFileID>"                             
                         "</SendData>"
                         "</soap:Body>\n"
                         "</soap:Envelope>\n", @"33", @"2013-09-09", resultx ,
                              resultx2 ,resultx3 ,@"true" ,@"true", @"true", @"true" ,
                              @"true" , @"3", @"notes", @"2013-09-09", @"123",
                              @"mymacid", @"sfileid"];
NSLog(soapMessage);

_lbl_result.text = soapMessage;


NSURL *url = [NSURL URLWithString:@"http://192.168.1.57/service1.asmx"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];

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

NSURLConnection *theConnection = 
        [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

if( theConnection )
{
    webData = [NSMutableData data];
}
else
{
    NSLog(@"theConnection is NULL");
}

//[nameInput resignFirstResponder];
}

  -(void)connection:(NSURLConnection *)connection 
 didReceiveResponse:(NSURLResponse *)response
  {
[webData setLength: 0];
   }
  -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
 {
[webData appendData:data];
  }
 -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
 {
NSLog(@"ERROR with theConenction");
[connection release];
[webData release];
 }
 -(void)connectionDidFinishLoading:(NSURLConnection *)connection
 {
NSLog(@"DONE. Received Bytes: %d", [webData length]);
NSString *theXML = [[NSString alloc] initWithBytes:[webData mutableBytes] 
                                            length:[webData length] 
                                          encoding:NSUTF8StringEncoding];
NSLog(theXML);
_lbl_result.text = theXML;

[theXML release];

[connection release];
[webData release];
   }

Answer 1

您需要在单独的线程上运行服务器调用。它卡住的原因是因为您在 UI 线程上运行它。尝试使用它。

   dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void){
        //Run server call
        dispatch_async(dispatch_get_main_queue(), ^(void){
            //Run UI Updates
        });
    });