Fix UIKitThreadAccessException during chart animation on iOS#373
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follesoe wants to merge 1 commit into
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Fix UIKitThreadAccessException during chart animation on iOS#373follesoe wants to merge 1 commit into
follesoe wants to merge 1 commit into
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The DelayTimer fires its animation step callback on a background thread, which updates AnimationProgress and triggers InvalidateSurface(). On iOS this calls UIView.SetNeedsDisplay() which must run on the UI thread. Marshal the InvalidateSurface() call through Dispatcher.Dispatch() in the invalidation observer callback. Fixes #1 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
InvalidateSurface()throughDispatcher.Dispatch()in the MAUIChartViewinvalidation callback to avoid calling UIKit from a background threadThe
DelayTimerused byChart.AnimateAsyncfires its step callback on a background thread. This updatesAnimationProgress, which triggersInvalidateSurface()->UIView.SetNeedsDisplay(). On iOS, UIKit throws aUIKitThreadAccessExceptionbecauseSetNeedsDisplaymust be called from the main thread.Fixes follesoe#1
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