一、刪除系統自帶的tabbar

在開發中，我們時常會需要自己定義tabbar，使用自定義tabbar時，返回或者跳轉時會遇到tabbar重影的現象，這個時候我們需要將系統的tabbar

// 實現navigationController的代理方法
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    // 刪除系統自帶的tabBarButton
 

    for (UIView *tabBar in self.tabBarController.tabBar.subviews) {
        if ([tabBar isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
            [tabBar removeFromSuperview];
        }
    }
}

二、設定自定義tabbar的選中效果

MainTabBarViewController * tabBarController = (MainTabBarViewController *)self.navigationController
 
.tabBarController;
    tabBarController.selectedIndex = 0;
    tabBarController.customTabBar.selectedButton.selected = NO;

    for (UIView *child in tabBarController.customTabBar.subviews) {
        if ([child isKindOfClass:[MainTabBarButton class]]) {

            if (child.tag == 0) {
                tabBarController.customTabBar
 
.selectedButton = (MainTabBarButton *)child;
                tabBarController.customTabBar.selectedButton.selected = YES;
            }
        }
    }