download multiple files on iphone

i want to download file(s) from web server.

Scenario: As user will select row (file name- user can select 1 or more files to download) and and press download, i am getting URL for each file(all have different URL) and storing into pathArray. and doing following

-(void)downloadFile    {  
    for (int i = 0; i<[pathArray count]; i++) {    
        NSURL *fileURL = [NSURL fileURLWithPath:[pathArray objectAtIndex:i]];  

        NSString *ResultURL = [fileURL absoluteString];  
        NSURL *url = [[NSURL alloc] initWithString:ResultURL];   
        NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL: url   
        cachePolicy: NSURLRequestReloadIgnoringCacheData  timeoutInterval: 60.0];   
        conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];  

        if (conn)   {
          NSLog(@"*************CONNECTED************");  
          webData = [[NSMutableData data] retain];  
          NSLog(@"weblength : %d : ", [webData length]);  
          downloadTag = YES;  
        } else {
            NSLog(@"*************Connection NOT DONE************");  
            downloadTag=NO;  
        }  
    }  
}


-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data  {  
    NSLog(@"*************Try to receive data************");  
    [webData appendData:data];  
    NSLog(@"weblength : %d : ", [webData length]);  
    NSLog(@"*************Data Received an append too ***********");  
    if (downloadTag == YES)  {  
        paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
        self.documentsDir = [[paths objectAtIndex:0]stringByAppendingPathComponent:@"NewResult.zip" ];  
        [[NSFileManager defaultManager] createFileAtPath:documentsDir 开发者_JS百科contents:nil attributes:nil];  
        NSFileHandle *file1 = [NSFileHandle fileHandleForUpdatingAtPath: documentsDir];  
        [file1 writeData: webData];  
        NSLog(@"Webdata : %d",[webData length]);  
        [file1 closeFile];  
    }  
}    

if i am not using for loop i.e only one file download then it work fine but not with for loop....its really important for me to solve this issue.

thank you very much

---

take a look at ASIHTTPRequest, it has a nice queue for downloading and monitoring progress http://allseeing-i.com/ASIHTTPRequest/How-to-use

---

You're using asynchronous downloads, but the delegate for each download item is the same object, causing all of the downloaded data to get appended to the same file. The way I do it is to have a small Object (DownloadQueueItem) that is the delegate for a single download. When you download another file, you create a new DownloadQueueItem and it handles everything.

---

Edit:

Q: instead of %i putting by my self i am searching is there any way to create new file every time like if ""NewResult.zip" is exist then create "NewResult1.zip" and so on

A: You could do something like this:

NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filename = @"NewResult%@.zip";
for (int i = 0; ; i++) {
    NSString *filename = NULL;

    if (i == 0) {
        filename = [NSString stringWithFormat:filename, @""];
    }
    else {
        filename = [NSString stringWithFormat:filename, [NSString stringWithFormat:@"%i", i]];
    }

    if (![[NSFileManager defaultManager] fileExistsAtPath:filename]) {
        // Save file.
        break;
    }
}