ios 返回上上级页面等指定页面2019-05-09

 int index =(int)[[self.navigationController viewControllers]indexOfObject:self];

(index 本页面的标记,向前跳转的个数进行减少)  

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:index-2] animated:YES];

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