uitabbarController的標籤疊加在一起過一會纔會恢復正常

跳轉到uitabbarController時出現了下面的BUG

我的部分代碼如下：

    equipmentViewController * equip=[[equipmentViewController alloc]init];

    myNavigationController *nav3=[self NavigationControllerWithviewController:equip title:@"服務" image:@"fuwu@2x" selectedImage:@"fuwuselected@2x"];

    settingViewController * set=[[settingViewController alloc]init];

    myNavigationController *nav4=[self NavigationControllerWithviewController:set title:@"設置" image:@"shezhi@2x" selectedImage:@"shezhiselected@2x"];

    self.viewControllers=@[nav,nav1,nav2,nav3,nav4];

後來經過測試，把uitabbarController添加子視圖的方法由self.viewControllers=@[nav,nav1,nav2,nav3,nav4];改成 [self addChildViewController:nav];（剩下的我就不一一寫出來了）就好了。

    equipmentViewController * equip=[[equipmentViewController alloc]init];

    myNavigationController *nav3=[self NavigationControllerWithviewController:equip title:@"服務" image:@"fuwu@2x" selectedImage:@"fuwuselected@2x"];

    settingViewController * set=[[settingViewController alloc]init];

    myNavigationController *nav4=[self NavigationControllerWithviewController:set title:@"設置" image:@"shezhi@2x" selectedImage:@"shezhiselected@2x"];

//    self.viewControllers=@[nav,nav1,nav2,nav3,nav4];

    [self addChildViewController:nav];

    [self addChildViewController:nav1];

    [self addChildViewController:nav2];

    [self addChildViewController:nav3];

    [self addChildViewController:nav4];