连续两次Pop

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    NSMutableArray *navigationarray = [NSMutableArray arrayWithArray:self.navigationController.viewControllers];

    [navigationarray removeObjectAtIndex:navigationarray.count-1];

   [navigationarray removeObjectAtIndex:navigationarray.count-1];

    self.navigationController.viewControllers = navigationarray;

连续两次Pop

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原文地址：http://www.cnblogs.com/zhibin/p/4432379.html