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iOS

Posted by Matthew Waller
Matthew Waller
1,698 Points

Using Parse.com to update an array?

So I'm working through the set of parse.com lessons for iOS. I'm wondering, is there a way to use Parse.com to update an NSArray of strings? For instance, we have a set amount of responses in the Crystal Ball app, for those who have done the project.

Would there be a way to add or subtract responses from the NSArray of responses using Parse.com, so that a developer wouldn't have to update the entire app each time to get new responses?

I'm been browsing Parse's developer guidelines here ( https://parse.com/docs/ios_guide#objects/iOS ), but I can't think a way to make the above scenario happen.

Any tips or ideas?

2 Answers

Matthew Waller
Matthew Waller
1,698 Points

Did some asking around the Internet and tested it out. The rest would look like this

NSUInteger index = arc4random_uniform(predictions.count);

PFObject *predictionPFObject = [predictions objectAtIndex: index];
self.fortuneLabel.text = [predictionPFObject objectForKey:@"predictions"];

where @"predictions" is the name of the column filled with predictions.

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

You would have to create a table to store all the predictions. Let's assume you call this table "Predictions".

PFQuery *query = [PFQuery queryWithClassName:@"GameScore"];
NSArray *predictions = [query findObjects];
Matthew Waller
Matthew Waller
1,698 Points

I'm getting an error in the app I'm using this for. It's saying "[PFObject length]: unrecognized selector sent to instance 0xbe6ab70"

When I debug, it's failing at the self.predictionArray objectAtIndex:index part of the code.