使用InteractiveViewer随Flutter一起提供的小部件。
@override
Widget build(BuildContext context) {
return Center(
child: InteractiveViewer(
panEnabled: false, // Set it to false to prevent panning.
boundaryMargin: EdgeInsets.all(80),
minScale: 0.5,
maxScale: 4,
child: Flutterlogo(size: 200),
),
);
}
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