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iOS

Posted by Mike Lee
Mike Lee
6,579 Points

Help with parse.com and UIImage

Hi i have a image stored on parse.com and I m trying to get that image and put it into my UIImageView.What am I doing wrong

Here is my code:

-(void)viewWillAppear:(BOOL)animated {

PFUser *currentuser = [PFUser currentUser];
PFQuery *query = [PFQuery queryWithClassName:@"User"];
[query whereKey:@"username" equalTo:currentuser];
[query whereKey:@"profilePic" equalTo:@"image.png"];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
    if (!error) {
        PFFile *file = [object objectForKey:@"image"];
        // file has not been downloaded yet, we just have a handle on this file

        // Tell the PFImageView about your file
        imageView.file = file;

        // Now tell PFImageView to download the file asynchronously
        [imageView loadInBackground];
    }
}];

}

10 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

if your image is an attribute of your user class, I dont think you need to query for it. Just access it from your currentUser.

PFUser *currentuser = [PFUser currentUser];
PFFile *file = [currentUser objectForKey:@"profilePic"];
// Tell the PFImageView about your file
imageView.file = file;
// Now tell PFImageView to download the file asynchronously
[imageView loadInBackground];
Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

So how what exactly what would I put in my imageView.image = ?

Stone Preston
Stone Preston
42,016 Points

if you are using PFImageView the loadInBackground method takes care of that

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

I get this error from the imageView.file line

-[UIImageView setFile:]: unrecognized selector sent to instance 0x93e5350 2014-05-06 12:46:59.086 NextUp[65564:15503] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImageView setFile:]: unrecognized selector sent to instance 0x93e5350'

Stone Preston
Stone Preston
42,016 Points

do you have your image views class set to PFImageView?

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

Yes in my .h file I have @property(strong,nonatomic) PFImageView *imageView;

Stone Preston
Stone Preston
42,016 Points

are you using storyboards?

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

Yes and I connected the image View with the click and drag to the .h file

Stone Preston
Stone Preston
42,016 Points

click on your imageView in your storyboard and open the identity inspector. Make sure you have PFImageView set as its custom class. If you dont have that as its class type it in. remove your old property declaration and remove the connection using the connections inspector. Then click and drag again to your .h file to connect it again

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

ok I changed the class and removed and reconnected the connection,but I still get the same error

Stone Preston
Stone Preston
42,016 Points

ok try logging the class name before calling the method to verify the class is correct

PFUser *currentuser = [PFUser currentUser];
NSString *className = NSStringFromClass([imageView class]);
NSLog(@"imageView class:%@", className);
PFFile *file = [currentUser objectForKey:@"profilePic"];
// Tell the PFImageView about your file
imageView.file = file;
// Now tell PFImageView to download the file asynchronously
[imageView loadInBackground];
Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

The app runs then crashes when I click on my profile tab

I dont know if some of my other code is interfering but heres some of it:

  • (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    UIImage *chosenImage = info[UIImagePickerControllerEditedImage]; self.imageView.image = chosenImage;

    NSData *imageData = UIImagePNGRepresentation(chosenImage); PFFile *imageFile = [PFFile fileWithName:@"image.png" data:imageData]; [imageFile saveInBackground];

    PFUser *user = [PFUser currentUser]; [user setObject:imageFile forKey:@"profilePic"]; [user saveInBackground];

    [picker dismissViewControllerAnimated:YES completion:NULL];

}

  • (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

    [picker dismissViewControllerAnimated:YES completion:NULL];

}

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

any ideas?

Stone Preston
Stone Preston
42,016 Points

do you still get the same error when it crashes?

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

Yes it gives the same error

Stone Preston
Stone Preston
42,016 Points

did you try logging the class name like I said

Mike Lee
Mike Lee
6,579 Points
Mike Lee
Mike Lee
6,579 Points

yes but I figured it out, in the app delegate did finishFinishLaunching I had to put [PFImageView class];