To judge whether the initial state

[Ella-Sun]

When scaling chart, how to judge whether it returns to the initial state?

[Ella-Sun]

the parameters of it "- (void)chartScaled:(ChartViewBase *)chartView scaleX:(CGFloat)scaleX scaleY:(CGFloat)scaleY" doesn't work.

[DivineDominion]

What code do you have in chartScaled:scaleX:scaleY?

[liuxuan30]

you could try chartViewPortHandler.scaleX/scaleY
BTW, chartScaled should work. I checked the code. If you say it's not working, could you help try debug?
it's in @objc private func pinchGestureRecognized(recognizer: NSUIPinchGestureRecognizer)

If you are not triggering the zooming with gesture, it won't work.

if you are sure the gesture not triggering, feel free to reopen and post the trace