ios修改导航栏的title的文字颜色

    UINavigationBar *navBar = [UINavigationBar appearance];
    navBar.barTintColor = [UIColor redColor];
    navBar.tintColor = [UIColor whiteColor];
    [navBar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
    
    UIBarButtonItem *item = [UIBarButtonItem appearance];
    item.tintColor = [UIColor whiteColor];

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

效果如下