React Native - Scrollview - Apply a zoom using a method/function not pinch

Question

As the zoomScale parameter does not seem to affect the initial zoom level, I would like to set a zoom on my ScrollView using a method/function.

I found that via the ScrollView reference, I can get the responder and then apply scrollResponderZoomTo but it's iOS only.

Is there a way to manipulate the zoom of a ScrollView by another way than the pinch gesture?

Answer 1

Answering my own question, it's possible to use the function scrollResponderZoomTo on the responder of the ScrollView via the reference of the component :

...
<ScrollView
   ref={this.scrollViewRef}
...

And a call like this :

this.scrollViewRef.current?.getScrollResponder().scrollResponderZoomTo({
    x: viewContentOffsetX || 0,
    y: viewContentOffsetY || 0,
    width: widthOfTheVisiblePart,
    height: heightOfTheVisiblePart,
    animated: false})

Up to a function to calculate the visible part based on the expected zoom value