常用的语句

导航栏的隐藏

self.navigationController.navigationBarHidden = YES;

[self.navigationController setNavigationBarHidden:YES animated:YES];

 这个改变所有的 导航栏的属性 一般写在 appDelegate 中

[[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:kColorWhite ,NSFontAttributeName:[UIFont systemFontOfSize:20.f]}];

设置单个导航栏的 标题属性

[self.navigationController.navigationBar setTitleTextAttributes:

     @{NSFontAttributeName:[UIFont systemFontOfSize:15],

       NSForegroundColorAttributeName:kColorBlack}];

设置导航栏的 背景图片

    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"nav_bar3"] forBarMetrics:UIBarMetricsDefault];

  [[UINavigationBar appearance] setShadowImage:[UIImage alloc]];

[[UINavigationBar appearance] setTintColor:kColorWhite];

导航栏自定义view

self.navigationItem.titleView = titleBtn;

    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

底部tabbar 隐藏

self.tabBarController.tabBar.hidden = YES;

_pageCountrol的圆点图片

[_pageCountrol setValue:[UIImage imageNamed:@"icon_circle1"] forKey:@"_currentPageImage"];

  [_pageCountrol setValue:[UIImage imageNamed:@"icon_circle2"] forKey:@"_pageImage"];