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iOS

Posted by Jared Gross
Jared Gross
2,686 Points

imagePicker freezing upon image upload

I have an imagePicker that takes pictures and uploads them to Parse. Only problem is whenever I upload an image, the image is frozen in the view. The app, however, is not frozen because I have an overlay view with a UILabel as a timer and the timer still counts down. I've tried many different placement combinations of dismissing and presenting the viewControllers/imagePicker as well as not calling either but haven't been successful yet. any help is greatly appreciated, thanks!

// uploads the files/data to Parse
- (void)uploadMessage {
    NSData *fileData;
    NSString *fileName;
    NSString *fileType;

    if (self.image != nil) {
        UIImage *newImage = [self resizeImage:self.image toWidth:320.0f    andHeight:480.0f];
        fileData = UIImagePNGRepresentation(newImage);
        fileName = @"image.png";
        fileType = @"image";
    }
    else {
        fileData = [NSData dataWithContentsOfFile:self.videoFilePath];
        fileName = @"video.mov";
        fileType = @"video";
    }

     PFFile *file = [PFFile fileWithName:fileName data:fileData];
    [file saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {

        if (error) {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An error occurred!"   message:@"Please try sending your file again." delegate:self cancelButtonTitle:@"OK"   otherButtonTitles:nil];

            [alertView show];
        }
         else {
            NSString *documentsDirectory =   [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

            PFObject *image = [PFObject objectWithClassName:@"Images"];
            [image setObject:file forKey:@"file"];
            [image setObject:fileType forKey:@"fileType"];
            [image setObject:self.recipients forKey:@"recipientIds"];
            [image setObject:[[PFUser currentUser] objectId] forKey:@"senderId"];
            [image setObject:[[PFUser currentUser] username] forKey:@"senderName"];
            [image saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
                if (error) {
                    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An error   occurred!"
                                                                        message:@"Please try sending your file again."
                                                                       delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                    [alertView show];
                }
                else {
                    NSLog(@"everything was successfull");
                    [self reset];
                }
            }];
        }
    }];
}

 // resets the current data
    - (void)reset {
        self.image = nil;
        self.videoFilePath = nil;
        NSLog(@"Reset was succes!");
    }

1 Answer

Amit Bijlani
STAFF
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

The only potential problem I can see is that you have nested saveInBackgroundWithBlock. Instead, you might want to have server side code where you send the file and it creates the necessary relationships on the server. See: https://parse.com/docs/cloud_code_guide