葬花魂 追梦 专辑：想你了，你好吗 语种：国语 流派：Pop 发行时间：2016-10-01 本歌词于吾爱知道收集
I have 10 views with UINavigationController in hierarchy. Now when I want to go back from 10 to 9, and so on with back button, which methodshould I use?
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