Ios objective-c在发送到web服务后冻结

我非常努力地编写了一个IPad应用程序，它可以拍摄3张照片并将它们发送到.NETSOAPWeb服务。它发送的照片正确，我可以看到他们在我的服务器。但问题是，当我单击“发送”按钮时，按钮保持蓝色单击效果，应用程序冻结

我相信我把照片发送到webservice是做错了。我也在做所有的发布工作

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];
   }

---

你在主线程中创建请求，这样你的应用程序就是freez。你在后台线程中创建请求，然后为用户加载图标…要加载图标，请参见

你在主线程UI线程上执行网络代码，因此它将被锁定，因为你正在给它工作，而不是面向UI的工作

我建议采用以下方法：

[NSURLConnection sendAsynchronousRequest:队列：completionHandler:]

它应该是同步调用的直接交换，block completionhandler将为您提供状态

例如，通过以下操作，您将删除所有针对NSURLConnection的代理回调

替换：

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

与：

---

您将希望使用以下方法异步发送请求：sendAsynchronousRequest:queue:completionHandler:

---

看看

您需要在单独的线程上运行服务器调用。它冻结的原因是因为您正在UI线程上运行它。试着用这个

   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
        });
    });

---

我的问题是我在主线程中将图像发送到webservice。我通过@user352891用上面的答案解决了这个问题。然而，它并没有完全解决我的问题

从Ipad发送3张照片是一个大数据量。不幸的是，我正在观察我发送给webservice的内容，并在标签和日志中显示webservice对象。这就是为什么它会挂起来。它等待来自Hugeee的Web服务的响应

---

我注释了所有日志并显示到标签。它成功了

您能粘贴错误消息吗？感谢没有错误消息，它做了它应该做的事情。它将图像发送到web服务，这是完美的，但应用程序冻结+1以供MBProgressHUD参考，方便的项目，非常易于使用。我是IOS新手。你能告诉我在哪里贴这个吗？我把它换了，但同样的事情发生了

   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
        });
    });