自定义UITabBar以及UITabBarItem

1.tabbar颜色

[[UITabBar appearance] setBarTintColor:[UIColor whiteColor]];

2.tabbaritem图片无渲染

item.selectedImage = [item.selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

3.tabbaritem文字颜色

[[UITabBarItem appearance] setTitleTextAttributes:@{ NSForegroundColorAttributeName:[UIColor whiteColor]} forState:UIControlStateNormal];