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[flutter] Guard async SpineWidget loads after dispose

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Closes #3038
This commit is contained in:
Mario Zechner 2026-03-14 15:58:33 +01:00
parent e5bc9b709e
commit 516518b2d9
1 changed files with 43 additions and 18 deletions
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61
spine-flutter/lib/spine_widget.dart
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@ -438,15 +438,12 @@ class SpineWidget extends StatefulWidget {
class _SpineWidgetState extends State<SpineWidget> {
late Bounds _computedBounds;
SkeletonDrawableFlutter? _drawable;
int _loadGeneration = 0;
@override
void initState() {
super.initState();
if (widget._assetType == _AssetType.drawable) {
loadDrawable(widget._drawable!);
} else {
loadFromAsset(widget._bundle, widget._atlasFile!, widget._skeletonFile!, widget._assetType);
}
_loadCurrentDrawable();
}
@override
@ -469,16 +466,29 @@ class _SpineWidgetState extends State<SpineWidget> {
}
if (hasChanged) {
widget._controller._drawable?.dispose();
_drawable = null;
if (widget._assetType == _AssetType.drawable) {
loadDrawable(widget._drawable!);
} else {
loadFromAsset(widget._bundle, widget._atlasFile!, widget._skeletonFile!, widget._assetType);
}
_disposeDrawable(oldWidget._controller);
_loadCurrentDrawable();
}
}
void _loadCurrentDrawable() {
final loadGeneration = ++_loadGeneration;
if (widget._assetType == _AssetType.drawable) {
loadDrawable(widget._drawable!);
} else {
loadFromAsset(widget._bundle, widget._atlasFile!, widget._skeletonFile!, widget._assetType, loadGeneration);
}
}
void _disposeDrawable(SpineWidgetController controller) {
final drawable = _drawable;
if (drawable == null) return;
if (controller._drawable == drawable) controller._drawable = null;
drawable.dispose();
_drawable = null;
}
void loadDrawable(SkeletonDrawableFlutter drawable) {
_drawable = drawable;
_computedBounds = widget._boundsProvider.computeBounds(drawable);
@ -486,23 +496,37 @@ class _SpineWidgetState extends State<SpineWidget> {
setState(() {});
}
void loadFromAsset(AssetBundle? bundle, String atlasFile, String skeletonFile, _AssetType assetType) async {
void loadFromAsset(
AssetBundle? bundle,
String atlasFile,
String skeletonFile,
_AssetType assetType,
int loadGeneration,
) async {
late final SkeletonDrawableFlutter drawable;
switch (assetType) {
case _AssetType.asset:
loadDrawable(await SkeletonDrawableFlutter.fromAsset(atlasFile, skeletonFile, bundle: bundle));
drawable = await SkeletonDrawableFlutter.fromAsset(atlasFile, skeletonFile, bundle: bundle);
break;
case _AssetType.file:
loadDrawable(await SkeletonDrawableFlutter.fromFile(atlasFile, skeletonFile));
drawable = await SkeletonDrawableFlutter.fromFile(atlasFile, skeletonFile);
break;
case _AssetType.http:
loadDrawable(await SkeletonDrawableFlutter.fromHttp(atlasFile, skeletonFile));
drawable = await SkeletonDrawableFlutter.fromHttp(atlasFile, skeletonFile);
break;
case _AssetType.memory:
loadDrawable(await SkeletonDrawableFlutter.fromMemory(atlasFile, skeletonFile, widget._loadFile!));
drawable = await SkeletonDrawableFlutter.fromMemory(atlasFile, skeletonFile, widget._loadFile!);
break;
case _AssetType.drawable:
throw Exception("Drawable can not be loaded via loadFromAsset().");
}
if (!mounted || loadGeneration != _loadGeneration) {
drawable.dispose();
return;
}
loadDrawable(drawable);
}
@override
@ -523,8 +547,9 @@ class _SpineWidgetState extends State<SpineWidget> {
@override
void dispose() {
_loadGeneration++;
_disposeDrawable(widget._controller);
super.dispose();
widget._controller._drawable?.dispose();
}
}