gistfile1.txt

    func annotationView() -> MKAnnotationView {
        let annonView = MKAnnotationView(annotation: self, reuseIdentifier: "annotation")
        annonView.enabled = true
        annonView.canShowCallout = true
        
        let image = UIImage(named: "incident")
        let imageView = UIImageView(frame: CGRectMake(0, 0, image!.size.width, image!.size.height))
        imageView.image = image?.imageWithRenderingMode(.AlwaysTemplate)
        let level = Model.getLevelWithId(incident.levelId)
        var color = (level?.color != nil) ? level?.color : UIColor.redColor()
        imageView.tintColor = color
        
        UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, false, 0.0)
        imageView.layer.renderInContext(UIGraphicsGetCurrentContext())
        let img = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        annonView.image = img
        annonView.tintColor = color
        let rightButton = UIButton.buttonWithType(UIButtonType.InfoDark) as! UIButton
        annonView.rightCalloutAccessoryView = rightButton
        if_let(incident.user, incident.user?.avatar) { (user, avatarURL) -> () in
            dispatch_async(dispatch_queue_create("imgDownload", nil), { () -> Void in
                let data = NSData(contentsOfURL: avatarURL)
                if let data = data {
                    dispatch_async(dispatch_get_main_queue(), { () -> Void in
                        let leftImageView = UIImageView(image: UIImage(data: data))
                        leftImageView.frame = CGRectMake(5, 0, 50, 50)
                        leftImageView.contentMode = UIViewContentMode.ScaleAspectFit
                        leftImageView.layer.cornerRadius = 25
                        leftImageView.clipsToBounds = true
                        annonView.leftCalloutAccessoryView = leftImageView
                    })
                }
            })
        }
        
        
        return annonView
        
    }