ios--多级push或present Controller 直接返回到根目录

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iOS-多级push或present Controller 直接返回到根目录

// push /present Controller 回到根目录
-(void)toRootViewController{
UIViewController * viewController = self.navigationController;
while (viewController.presentingViewController) {
//是否是最底层控制器
if ([viewController isKindOfClass:[UINavigationController class]]) {
viewController = viewController.presentingViewController;
}else{
break;
}
}
if (viewController) {
[viewController dismissViewControllerAnimated:NO completion:nil];
} }

-(void)navLeftButtonClick:(id)sender{//退出返回到首页
        [self toRootViewController];
    }