How to upload an image to Parse.com from UIImageView

Question

My App is called "Draw Me" and use Parse.com. User draws an image in UIImageView and it should be saved(uploaded) to Parse.com. Can someone advise how to do it?

Solution 1

Parse has an iOS tutorial on this exact topic: https://parse.com/tutorials/anypic

Christian has outlined how to save the image itself, but I assume you also want to associate it with a PFObject as well. Building on his answer (with an example of saving out as jpeg)

// Convert to JPEG with 50% quality
NSData* data = UIImageJPEGRepresentation(imageView.image, 0.5f);
PFFile *imageFile = [PFFile fileWithName:@"Image.jpg" data:data];

// Save the image to Parse

[imageFile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
    if (!error) {
        // The image has now been uploaded to Parse. Associate it with a new object 
        PFObject* newPhotoObject = [PFObject objectWithClassName:@"PhotoObject"];
        [newPhotoObject setObject:imageFile forKey:@"image"];

        [newPhotoObject saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
            if (!error) {
                NSLog(@"Saved");
            }
            else{
                // Error
                NSLog(@"Error: %@ %@", error, [error userInfo]);
            }
        }];
    }
}];

Solution 2

Here's how to go about doing this:

UIImageView *imageView; // ...image view from previous code
NSData *imageData = UIImagePNGRepresentation(imageView.image);
PFFile *file = [PFFile fileWithData:imageData]
[file saveInBackground];

…and to retrieve it again:

[file getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
  if (!error) {
    imageView.image = [UIImage imageWithData:data];
  }
}];