手势自由缩放与拖动图片（图片可层叠显示）
一个源代码工程,依据手势自在的缩放和拖动图片,图片可层叠显示本资料共包括以下附件:(A source code project, according to the free scaling and dragging pictures of gestures, the pictures can be displayed in layers. This data includes the following attachments:)
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