Question

下面的代码我使用asmx webservice将文件作为字节数组获取，并希望将其保存到iphone应用程序的文档目录

我请求的文件是sqlite文件

我的代码是：

-(void)getfile{


NSString* soapMessage = [NSString stringWithFormat:
                         @"<?xml version=\"1.0\" encoding=\"utf-8\"?><soap:Envelope xmlns:xsi=\"http://w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"> <soap:Body> <GetDocument xmlns=\"http://tempuri.org\"> <DocumentName>%@</DocumentName> </GetDocument></soap:Body> </soap:Envelope>", @"ErtugrulGuler"];
NSURL* theUrl = [NSURL URLWithString:@"http://test.xxxx.com/xxxxx/xxxx.asmx"];
                 NSString* msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];
                 NSMutableURLRequest* theRequest = [NSMutableURLRequest requestWithURL:theUrl];
                 [theRequest addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
                 [theRequest addValue:@"http://tempuri.org/GetDocument" forHTTPHeaderField:@"SOAPAction"];
                  [theRequest setHTTPMethod:@"POST"];
                  [theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];
                  [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *connect = [[NSURLConnection alloc] initWithRequest: theRequest delegate:self];
if (connect) 
{


}
else {

    NSLog(@"No Connection established");

 }
 }

  - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
// A response has been received, this is where we initialize the instance var you created
// so that we can append data to it in the didReceiveData method
// Furthermore, this method is called each time there is a redirect so reinitializing it
// also serves to clear it
downloadData = [[NSMutableData alloc] init];
  }

 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
// Append the new data to the instance variable you declared
[downloadData appendData:data];
NSString *receivedDataString = [[NSString alloc] initWithData:downloadData encoding:NSUTF8StringEncoding];
NSLog(@"data string: %@",receivedDataString);
NSLog(@"data length: %d",[data length]);
//NSLog(@"bytesWritten == %d error == %@",bytesWritten,[fileOutputStream streamError]);
 }



 - (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// The request is complete and data has been received
// You can parse the stuff in your instance variable now
//NSLog(@"finish loading");
 [self performSelector:@selector(downloadData:) withObject:downloadData afterDelay:0];

  }

  - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
// The request has failed for some reason!
// Check the error var
  }



   -(void)downloadData:(NSData*)response

  {

//NSLog(@" \n\n STRING =  %@ \n\n ",[[NSString alloc]initWithData:response encoding:NSUTF8StringEncoding]);

NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentDir=[paths objectAtIndex:0];

NSString *documentFile=[documentDir stringByAppendingPathComponent:@"abc.sqlite"];

NSString  * yourAppendingText=[[NSString alloc]initWithData:response encoding:NSUTF8StringEncoding];

[yourAppendingText writeToFile:documentFile atomically:YES encoding:NSUTF8StringEncoding error:nil];

  }

这是我的webservice方法，返回字节数组

[WebMethod]
public Byte[] GetDocument(string DocumentName)
{
    string strdocPath;
    strdocPath = "path" + DocumentName;

    FileStream objfilestream = new FileStream(strdocPath,FileMode.Open,FileAccess.Read);
    int len = (int)objfilestream.Length;            
    Byte[] documentcontents  = new Byte[len];
    objfilestream.Read(documentcontents,0,len);
    objfilestream.Close();

    return documentcontents;    
}

此代码连接成功但我不知道如何使用NSData获取文件并将文件写入文档目录为.sqlite

@EDIT：我解决了一些问题，但我想得到的文件是53kb，我收到的数据字符串如下：

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><GetDocumentResponse xmlns="http://tempuri.org/" /></soap:Body></soap:Envelope>

和数据长度：297因此它无法获取我认为的数据

在asp.net中运行服务并成功获取数据。所以服务没有问题，但可能会增加ios的最大尺寸？但怎么样？

Answer 1

NSOutputStream *fileOutputStream;
NSString *databasePath = [NSString stringWithFormat:@"%@/Documents/%@",NSHomeDirectory(),@"database.sqlite"];
    fileOutputStream = nil;
    fileOutputStream = [[NSOutputStream alloc] initToFileAtPath:databasePath append:NO];
    [fileOutputStream open];


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

   int bytesWritten  = [fileOutputStream write:[data bytes] maxLength:[data length]];
    NSLog(@" %s bytesWritten == %d  error == %@",__FUNCTION__,bytesWritten,[fileOutputStream streamError]);
}

如何将文件下载到iphone作为字节数组？

1 个答案: