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Editorial Team
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Asked: 2026-05-29T07:08:09+00:00

I have a scrollview with sub-view of core-plot graph view. It does not zoom

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I have a scrollview with sub-view of core-plot graph view. It does not zoom frequently. If we are zooming the scrollview after scrolling the view, it will get zoom.

Every time the delegate method – (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView will get called, but chance of calling the delegate method – (void)scrollViewDidZoom:(UIScrollView *)scrollView is very less.

What is the reason for this behaviour?

[consumptionGraphView_ addSubview:graphPlottedView_];
[graphPlottedView_ setContentScaleFactor:consumptionGraphView_.contentScaleFactor];

consumptionGraphView_.contentSize = consumptionGraphView_.frame.size;
consumptionGraphView_.minimumZoomScale = 1.0;
consumptionGraphView_.maximumZoomScale = 10.0;
consumptionGraphView_.zoomScale = 0.1;
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1 Answer

  1. Editorial Team

    The problem was due to the presence of UIGestureRecognizers in GraphHostingView of CorePlot.

     for (UIGestureRecognizer * recognizer in hostingView.gestureRecognizers) {
        [hostingView removeGestureRecognizer:recognizer];
    }

    This code will remove the UIGestureRecognizers and the graph zooming is perfect now.

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