following is my configuration, but the indicator is not placed in center of view actually.
self.indicatorView = [[MONActivityIndicatorView alloc] init];
self.indicatorView.delegate = self;
self.indicatorView.center = self.view.center;
self.indicatorView.numberOfCircles = 7;
self.indicatorView.radius = 5;
self.indicatorView.internalSpacing = 3;
self.indicatorView.duration = 0.5;
self.indicatorView.delay = 0.5;