Question

Hi I want to ask for a good tutorial that shows me how to download a file from URL to local phone storage using objective C
I have done the following its sync but i want to make it a synch

  NSString* docsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString* fileToDownload = @"data1.plist";
NSString* hostURLString = @"http://localhost/test";
hostURLString = [hostURLString stringByAppendingPathComponent: fileToDownload];
NSURL* pListURL = [NSURL URLWithString: hostURLString];
NSData* pListData = [NSData dataWithContentsOfURL: pListURL];
NSString* filePath = [docsDir stringByAppendingPathComponent: fileToDownload];
[pListData writeToFile: filePath atomically: NO];


NSString* Path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *DataPath = [Path stringByAppendingPathComponent:@"data1.plist"];

Any suggestions

Answer 1

Below is my code for async downloading images and data. You can play with it for your aims.

    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
    dispatch_async(queue, ^{
        NSLog(@"Screen %@ - pauseBannerFileImage download starts", self.name);          
        UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:newUrlForImage]]];
        NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:newUrlForImage]];
        dispatch_sync(dispatch_get_main_queue(), ^{
            NSLog(@"!-Screen %@-!pauseBannerFileImage downloaded", self.name);
            self.pauseBannerFileImage = image;
        });
    });