返回指定的VC

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    for (UIViewController *controller in self.navigationController.viewControllers) {
            if ([controller isKindOfClass:[PlaceOrderVC class]]) {
                [self.navigationController popToViewController:controller animated:YES];
            }
        }

返回指定的VC

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原文地址：http://www.cnblogs.com/sayimba/p/5698312.html