UILabel value not updating inside Parse block

Question

I have the following code:

var gaugeView1 = CHCircleGaugeView(frame: CGRectMake(0, 0, 280, 280))
self.mainGaugeView.addSubview(gaugeView1)
gaugeView1.setTitleValue("TODAY", hideLabel: false);

var query = PFQuery(className: "Values")
query.findObjectsInBackgroundWithBlock({ (objects, error) in
    if let valObjects = objects as? [PFObject] {
        for val in valObjects {
            if let average = val.objectForKey("AVERAGE") as? Double {
                dispatch_sync(dispatch_get_main_queue(), { () -> Void in
                    gaugeView1.setValue(average, hideLabel: false, animated: true)
                })
            }
        }
    }
})

The problem is that the gaugeView1.setValue() is not actually updating the value.

Originally I didn't have it running on the main thread and then added in the dispatch_sync() unfortunately that hasn't fixed the problem.

Answer 1

You should use dispatch_async instead of dispatch_sync:

dispatch_async(dispatch_get_main_queue(), { () -> Void in
  gaugeView1.setValue(average, hideLabel: false, animated: true)
})