Download image from url

Question

Hi ,

I am trying to download the image from the url http://a3.twimg.com/profile_images/414797877/05052008321_bigger.jpg

I am using the following code, but image is not saved. I want to know what i m doing wrong.

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://a3.twimg.com/profile_images/414797877/05052008321_bigger.jpg"]];
 [NSURLConnection connectionWithRequest:request delegate:self];

 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:@"pkm.jpg"];
 NSData *thedata = NULL;
 [thedata writeToFile:localFilePath atomically:YES];

 UIImage *img = [[UIImage alloc] initWithData:thedata];

Answer 1

If you set theData to nil, what do you expect it to write to the disk?

What you can use is NSData* theData = [NSData dataWithContentsOfURL:yourURLHere]; to load the data from the disk and then save it using writeToFile:atomically:. If you need more control over the loading process or have it in background, look at the documentation of NSURLConnection and the associated guide.

Answer 2

Hi It is clear that you are writing NULL data to your file.

In your code statement NSData *thedata = NULL; indicates that you assign NULL value to your data.

You are writing NULL data to your file as well.

Please check your code once again.

Thanks,
Jim.