n3.tabBarItem=[[UITabBarItem alloc]initWithTitle:@"333"image:nil tag:2];
self.viewControllers=@[n1,n2,n3];
self.tabBarController.selectedViewController= [self.viewControllers objectAtIndex:1];
n3.tabBarItem=[[UITabBarItem alloc]initWithTitle:@"333"image:nil tag:2];
self.viewControllers=@[n1,n2,n3];
self.tabBarController.selectedViewController= [self.viewControllers objectAtIndex:1];本文标题：无标题文章
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