Iphone NSURLConnection在设备上不工作

我的

NSURLConnection

有问题

我正在使用以下方式向服务器发送请求：

 [[NSURLConnection alloc] initWithRequest:request delegate:self];

但我收到一个“连接超时”错误

如果我使用wi-fi连接，它就可以正常工作。我的手机上有一个完善的3g网络，可以以相当快的速度访问其他应用程序和网站

我不明白为什么我的请求没有被发送到服务器

请帮忙

我刚才试过：

 [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES ];

---

但这也不起作用。

使用NSURLConnection有什么具体原因吗

我有类似的问题，并能够利用NSURLRequest参考下面的代码

-(NSString *)sendFile:(NSString*)url File:(NSString*)pFileName Handler:(NSObject*) sender{


    NSString *base64Data = [AppUtil compressAnd64EncodedString:pFileName];

    NSMutableString* requestURL = [[NSMutableString alloc] init];
    [requestURL appendString:url];

    NSMutableString* requestBody = [[NSMutableString alloc] init];
    [requestBody appendString:@"request="];
    [requestBody appendString:@""]; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: [NSString stringWithString:requestURL]]];

    // assume we are going to have data of 100 kb 
    NSMutableString *pRequestBody = [[NSMutableString alloc]initWithCapacity:100*1024];

    // append 
    [pRequestBody appendString:SOAP_START_PACKET];

    [pRequestBody appendString:base64Data];

    [pRequestBody appendString:SOAP_END_PACKET];

    [request setHTTPMethod: @"POST"];
    [request setValue:@"application/soap+xml" forHTTPHeaderField:@"content-type"];
    [request setValue:@"utf-8" forHTTPHeaderField:@"charset"];

    NSData *requestData = [NSData dataWithBytes: [pRequestBody UTF8String] length: [pRequestBody length]];

    [request setHTTPBody: requestData];

    [request setTimeoutInterval:HTTP_TIME_OUT];

    NSError        *error = nil;
    NSURLResponse  *response = nil;

    debugLog<<" sending request "<<endl;

    NSData *pData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    if(pData){
        NSString *pRespString = [[[NSString alloc] initWithData:pData
                                                       encoding:NSUTF8StringEncoding] autorelease];

        debugLog<<"Response of length = "<<(int)[pRespString length]<<endl;

        // write file depending upon the response 
        NSString *pAppFileName = [self parseAndGenerateFile:pRespString];

        // done with the data 
        //  [pData release];

        if(!pAppFileName){

            [self setErrorString:@"Server Error"];

            return nil;

        }

        return pAppFileName;


    }else{
        debugLog<<" data is NULL"<<endl;

        NSString *pErrorMessage = [error localizedDescription];

        [self setErrorString:pErrorMessage];

        /* Must be the Network error, lets show it to the user */

    }
    return nil;




}

-（NSString*）发送文件：（NSString*）url文件：（NSString*）pFileName处理程序：（NSObject*）发送程序{
NSString*base64Data=[AppUtil compressAnd64EncodedString:pFileName]；
NSMutableString*requestURL=[[NSMutableString alloc]init]；
[requestURL appendString:url]；
NSMutableString*requestBody=[[NSMutableString alloc]init]；
[requestBody appendString:@“request=“”；
[requestBody appendString:@”“；
NSMutableURLRequest*请求=[[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:[NSString STRING stringWithString:requestURL]]；
//假设我们将有100KB的数据
NSMutableString*pRequestBody=[[NSMutableString alloc]initWithCapacity:100*1024]；
//附加
[pRequestBody appendString:SOAP_START_数据包]；
[pRequestBody appendString:base64Data]；
[前传正文附录字符串：SOAP_END_数据包]；
[请求设置HttpMethod:@“POST”]；
[请求设置值：@“应用程序/soap+xml”用于HttpHeaderField:@“内容类型”]；
[请求设置值：@“utf-8”用于HttpHeaderField:@“charset”]；
NSData*requestData=[NSData dataWithBytes:[pRequestBody UTF8String]长度：[pRequestBody长度]]；
[请求setHTTPBody:requestData]；
[请求setTimeoutInterval:HTTP_TIME_OUT]；
n错误*错误=nil；
NSURLResponse*response=nil；
debugLog使用NSURLConnection有什么具体原因吗

我有类似的问题，并能够利用NSURLRequest参考下面的代码

-(NSString *)sendFile:(NSString*)url File:(NSString*)pFileName Handler:(NSObject*) sender{


    NSString *base64Data = [AppUtil compressAnd64EncodedString:pFileName];

    NSMutableString* requestURL = [[NSMutableString alloc] init];
    [requestURL appendString:url];

    NSMutableString* requestBody = [[NSMutableString alloc] init];
    [requestBody appendString:@"request="];
    [requestBody appendString:@""]; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: [NSString stringWithString:requestURL]]];

    // assume we are going to have data of 100 kb 
    NSMutableString *pRequestBody = [[NSMutableString alloc]initWithCapacity:100*1024];

    // append 
    [pRequestBody appendString:SOAP_START_PACKET];

    [pRequestBody appendString:base64Data];

    [pRequestBody appendString:SOAP_END_PACKET];

    [request setHTTPMethod: @"POST"];
    [request setValue:@"application/soap+xml" forHTTPHeaderField:@"content-type"];
    [request setValue:@"utf-8" forHTTPHeaderField:@"charset"];

    NSData *requestData = [NSData dataWithBytes: [pRequestBody UTF8String] length: [pRequestBody length]];

    [request setHTTPBody: requestData];

    [request setTimeoutInterval:HTTP_TIME_OUT];

    NSError        *error = nil;
    NSURLResponse  *response = nil;

    debugLog<<" sending request "<<endl;

    NSData *pData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    if(pData){
        NSString *pRespString = [[[NSString alloc] initWithData:pData
                                                       encoding:NSUTF8StringEncoding] autorelease];

        debugLog<<"Response of length = "<<(int)[pRespString length]<<endl;

        // write file depending upon the response 
        NSString *pAppFileName = [self parseAndGenerateFile:pRespString];

        // done with the data 
        //  [pData release];

        if(!pAppFileName){

            [self setErrorString:@"Server Error"];

            return nil;

        }

        return pAppFileName;


    }else{
        debugLog<<" data is NULL"<<endl;

        NSString *pErrorMessage = [error localizedDescription];

        [self setErrorString:pErrorMessage];

        /* Must be the Network error, lets show it to the user */

    }
    return nil;




}

-（NSString*）发送文件：（NSString*）url文件：（NSString*）pFileName处理程序：（NSObject*）发送程序{
NSString*base64Data=[AppUtil compressAnd64EncodedString:pFileName]；
NSMutableString*requestURL=[[NSMutableString alloc]init]；
[requestURL appendString:url]；
NSMutableString*requestBody=[[NSMutableString alloc]init]；
[requestBody appendString:@“request=“”；
[requestBody appendString:@”“；
NSMutableURLRequest*请求=[[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:[NSString STRING stringWithString:requestURL]]；
//假设我们将有100KB的数据
NSMutableString*pRequestBody=[[NSMutableString alloc]initWithCapacity:100*1024]；
//附加
[pRequestBody appendString:SOAP_START_数据包]；
[pRequestBody appendString:base64Data]；
[前传正文附录字符串：SOAP_END_数据包]；
[请求设置HttpMethod:@“POST”]；
[请求设置值：@“应用程序/soap+xml”用于HttpHeaderField:@“内容类型”]；
[请求设置值：@“utf-8”用于HttpHeaderField:@“charset”]；
NSData*requestData=[NSData dataWithBytes:[pRequestBody UTF8String]长度：[pRequestBody长度]]；
[请求setHTTPBody:requestData]；
[请求setTimeoutInterval:HTTP_TIME_OUT]；
n错误*错误=nil；
NSURLResponse*response=nil；
调试日志