This download manager uses the ASIHTTPRequest classes to download files. Can download files in back ground. Can download multiple files once at a time. It can resume interrupted downloads.
USAGE: You need ASIHTTPRequest classes get it https://github.com/pokeb/asi-http-request and setup your project Copy the downloadcell and downloadtableviewcontroller in your project.
Simply in your view controller viewdidload method do:
This will check for any interrupted download and resume it
downloadTableViewObj = [[DownloadTableViewController alloc] init];
[downloadTableViewObj setDelegate:self];
[downloadTableViewObj getInterruptedDownloadsAndResume];
And populate url in an array like this:
urlArray = [NSMutableArray arrayWithObjects:
@"http://dl.dropbox.com/u/97700329/file1.mp4",
@"http://dl.dropbox.com/u/97700329/file2.mp4",
@"http://dl.dropbox.com/u/97700329/file3.mp4",nil];
Remove the urls from your array that was interrupted because if you download one file multiple times it will cause problem
NSMutableArray *interruptedRequests = [[NSUserDefaults standardUserDefaults] objectForKey:@"interruptedDownloads"];
for(NSString *str in interruptedRequests)
{
if([urlArray containsObject:str])
[urlArray removeObject:str];
}
[myTableView reloadData];
Set up table view in your view controller
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return urlArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *cellIdentifier = [NSString stringWithFormat:@"Cell-%d-%d-%d",indexPath.section,indexPath.row,urlArray.count];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if(cell == Nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
[cell.textLabel setText:[[[urlArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"/"] lastObject]];
UIButton *downloadButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[downloadButton setFrame:CGRectMake(230, 5, 80, 35)];
[downloadButton setTitle:@"Download" forState:UIControlStateNormal];
[downloadButton addTarget:self action:@selector(downloadButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
[downloadButton setTag:indexPath.row];
[cell addSubview:downloadButton];
}
return cell;
}
Create a request and call the method "addDownloadRequest" of DownloadTableViewController Set the file destination path
-(void)downloadButtonTapped:(UIButton *)sender
{
NSURL *url = [NSURL URLWithString:[urlArray objectAtIndex:sender.tag]];
ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:url];
NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
[request setUserInfo:dictionary];
[downloadTableViewObj setDownloadDirectory:fileDestination];
[downloadTableViewObj addDownloadRequest:request];
[urlArray removeObjectAtIndex:sender.tag];
[myTableView reloadData];
}
Use three delegate methods
-(void)downloadController:(DownloadTableViewController *)vc startedDownloadingRequest:(ASIHTTPRequest *)request
{
NSLog(@"download started %@",[request userInfo]);
}
-(void)downloadController:(DownloadTableViewController *)vc finishedDownloadingReqeust:(ASIHTTPRequest *)request
{
NSLog(@"download finished %@",[request userInfo]);
}
-(void)downloadController:(DownloadTableViewController *)vc failedDownloadingReqeust:(ASIHTTPRequest *)request
{
NSLog(@"Error %@",[request error]);
[urlArray addObject:[request.url absoluteString]];
[myTableView reloadData];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Network error" message:[[request error] localizedDescription] delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
[alert show];
}
That's it
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