我需要使用我的iPad应用程序下载大型.zip文件(最大800 MB).
如果取消下载或应用程序在后台,我想再次恢复下载.
如果取消下载或应用程序在后台,我想再次恢复下载.
- operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
- operation.outputStream = [NSOutputStream outputStreamToFileAtPath:filePath append:YES];
- [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject){
- // unzip the .zip
- }failure:^(AFHTTPRequestOperation *operation,NSError *error){
- //Handle the error
- }];
- [operation setDownloadProgressBlock:^(NSInteger bytesWritten,long long totalBytesWritten,long long totalBytesExpectedToWrite) {
- //update the progressView
- }];
- [operation setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{
- // What I have to do here?
- }];
- [operation start];
- [operation waitUntilFinished];
- -(void)applicationWillResignActive:(UIApplication *)application{
- // What I have to do here?
- }
谢谢你的帮助.
解决方法
您可以使用AFDownloadRequestOperation执行此操作.
- NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"....zip"]];
- NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
- NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"....zip"];
- AFDownloadRequestOperation *operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:path shouldResume:YES];
- [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject) {
- NSLog(@"Successfully downloaded file to %@",path);
- } failure:^(AFHTTPRequestOperation *operation,NSError *error) {
- NSLog(@"Error: %@",error);
- }];
- [operation setProgressiveDownloadProgressBlock:^(NSInteger bytesRead,long long totalBytesRead,long long totalBytesExpected,long long totalBytesReadForFile,long long totalBytesExpectedToReadForFile) {
- NSLog(@"Operation%i: bytesRead: %d",1,bytesRead);
- NSLog(@"Operation%i: totalBytesRead: %lld",totalBytesRead);
- NSLog(@"Operation%i: totalBytesExpected: %lld",totalBytesExpected);
- NSLog(@"Operation%i: totalBytesReadForFile: %lld",totalBytesReadForFile);
- NSLog(@"Operation%i: totalBytesExpectedToReadForFile: %lld",totalBytesExpectedToReadForFile);
- }];
- [operations addObject:operation];
重新启动应用程序并生成具有相同URL的请求后,它将继续下载.“shouldResume：YES”有效
