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This surface.renderSurface.renderedCallback property is removed in v3.0. How do we know when drawing has ended with v3.0?

Hi Brad, there is a sciChartSurface.onSciChartRendered event instead. Check the members of ISCIChartSurface protocol here: https://www.scichart.com/documentation/ios/current/Protocols/ISCIChartSurface.html#/c:objc(pl)ISCIChartSurface(im)onSciChartRendered. Does this help?

Yes – thank you Andrew!

Andrew in working through this I don’t have it quite right. I am trying to call sciChartSurface.setRenderedListener(myViewController) so that my view controller’s implementation of onSciChartRendered will be called, however that doesn’t work. I am more accustomed to working with delegates, so if you can provide an example of how to properly listen for this event that would be great. Thanks!

Thank you Nazar that was very helpful – I have my code all straightened out now. However I have a new crash earlier on in SciRenderSurfaceDrawable2D before I even get to my render callback. The last output in the console is: 2020-04-26 13:34:42.041085-0400 IT[41040:8653335] Series name: Low Alarm 2020-04-26 13:34:42.041486-0400 IT[41040:8653335] Series name: High Alarm 2020-04-26 13:34:42.041663-0400 IT[41040:8653335] Series name: Ambient °F Then I hit an EXC_BAD_ACCESS with the following stack trace: Thread 1 Queue : com.apple.main-thread (serial) #0 0x00000001047c59a0 in SCRT2DRenderingPipeline::Begin() () #1 0x00000001045ea0bc in -[SCIRenderSurfaceDrawable2D drawFrameIn:withDrawableSize:] () #2 0x00000001046ef3d0 in -[SCITwisterRendererBase drawFrameIn:withDrawableSize:] () #3 0x00000001046083c4 in -[SCIMetalRenderer drawFrameIn:withDrawableSize:] () #4 0x0000000104644e78 in -[SCIMetalRenderSurfaceBase draw] () #5 0x00000001a3457250 in -[CALayer display] () #6 0x00000001a34666e4 in CA::Layer::layout_and_display_if_needed(CA::Transaction*) () #7 0x00000001a33ab170 in CA::Context::commit_transaction(CA::Transaction*, double) () #8 0x00000001a33d5f7c in CA::Transaction::commit() () #9 0x00000001a09cbb2c in _afterCACommitHandler () #10 0x000000019c836668 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ () #11 0x000000019c831308 in __CFRunLoopDoObservers () #12 0x000000019c8318b8 in __CFRunLoopRun () #13 0x000000019c831084 in CFRunLoopRunSpecific () #14 0x00000001a6a7f534 in GSEventRunModal () #15 0x00000001a09a1670 in UIApplicationMain () Are you familiar with what may cause this crash? Thank you again for any suggestions on why this may be happening.

The above crash looks to be resolved in the 3.1 release. I was seeing it in 3.0, but no longer see it in 3.1.