Uploading images to Firebase

Erik Published at Dev

Erik

I'm trying to upload images to Firebase like this:

Firebase *ref = [[Firebase alloc] initWithUrl:@"https://<app-name>.firebaseio.com/posts"];
Firebase *newPost = [ref childByAutoId];

NSDictionary *newPostData = @{
                              @"image" : [self encodeToBase64String:image]
                              };
[newPost updateChildValues:newPostData];

I'm using this code to encode the image:

- (NSString *)encodeToBase64String:(UIImage *)image {
return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
}

But this does not work as the string exceeds the maximum size:

Terminating app due to uncaught exception 'InvalidFirebaseData', reason: '(updateChildValues:) String exceeds max size of 10485760 utf8 bytes:

What can I do to resolve this problem? I haven't found anything online in regards to iOS development and images when using Firebase.

Frank van Puffelen

If the image is too big, you should store a smaller image. Let me quote myself: How do you save a file to a Firebase Hosting folder location for images through android?

The Firebase Database allows you to store JSON data. While binary data is not a type that is supported in JSON, it is possible to encode the binary data in say base64 and thus store the image in a (large) string. [But] while this is possible, it is not recommended for anything but small images or as a curiosity to see that it can be done.

Your best option is typically to store the images on a 3rd party image storage service.

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