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chapter10/zoom.html中的例子 #9

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heboliufengjie opened this issue Aug 1, 2016 · 0 comments

heboliufengjie commented Aug 1, 2016

很高兴从书上找到这里，我现在有个需求，通过两个按钮，一个放大和一个缩小按钮，实现zoom 的缩放，我发现没有对应的API，不知道老师有没有合适的方法，参考下

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