Style PFLoadingView in PFQueryTableViewController subclass

PFLoadingView-Style

- (void)stylePFLoadingViewTheHardWay
{
    UIColor *labelTextColor = [UIColor whiteColor];
    UIColor *labelShadowColor = [UIColor darkGrayColor];
    UIActivityIndicatorViewStyle activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite;

    // go through all of the subviews until you find a PFLoadingView subclass
    for (UIView *subview in self.view.subviews)
    {
        if ([subview class] == NSClassFromString(@"PFLoadingView"))
        {
            // find the loading label and loading activity indicator inside the PFLoadingView subviews
            for (UIView *loadingViewSubview in subview.subviews) {
                if ([loadingViewSubview isKindOfClass:[UILabel class]])
                {
                    UILabel *label = (UILabel *)loadingViewSubview;
                    {
                        label.textColor = labelTextColor;
                        label.shadowColor = labelShadowColor;
                    }
                }

                if ([loadingViewSubview isKindOfClass:[UIActivityIndicatorView class]])
                {
                    UIActivityIndicatorView *activityIndicatorView = (UIActivityIndicatorView *)loadingViewSubview;
                    activityIndicatorView.activityIndicatorViewStyle = activityIndicatorViewStyle;
                }
            }
        }
    }
}

It seems that's what I'm looking for. Can you tell where I have to call stylePFLoadingViewTheHardWay method?
Thanks in advance.

The same function in Swift is something like this:

func stylePFLoadingViewTheHardWay() {
    let labelTextColor = UIColor.whiteColor()
    let labelShadowColor = UIColor.blackColor()
    let activityIndicatorViewStyle = UIActivityIndicatorViewStyle.White

    // go through all of the subviews until you find a PFLoadingView subclass
    for view in self.view.subviews {
        if NSStringFromClass(view.classForCoder) == "PFLoadingView" {
            // find the loading label and loading activity indicator inside the PFLoadingView subviews
            for loadingViewSubview in view.subviews {
                if loadingViewSubview is UILabel {
                    var label:UILabel = loadingViewSubview as! UILabel
                    label.textColor = labelTextColor
                    label.shadowColor = labelShadowColor
                }
                if loadingViewSubview is UIActivityIndicatorView {
                    var indicator:UIActivityIndicatorView = loadingViewSubview as! UIActivityIndicatorView
                    indicator.activityIndicatorViewStyle = activityIndicatorViewStyle
                }
            }

        }
    }
}