iOS更改tabbar图片渲染 —不让tabbat有蓝色的渲染并修改文字

方式一
代码实现这种要写很多代码，每个控制器都要写
UIImage *image=[UIImage imageNamed:@"tabBar_friendTrends_click_icon"];
//    不让tabbar底部有渲染的关键代码
     image=[image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    vc01.tabBarItem.selectedImage=image;

更改tabbar下方的文字样式，大小，颜色
NSMutableDictionary *atts=[NSMutableDictionary dictionary];
// 更改文字大小
    atts[NSFontAttributeName]=[UIFont systemFontOfSize:12];
// 更改文字颜色
    atts[NSForegroundColorAttributeName]=[UIColor darkGrayColor];

    NSMutableDictionary *selectedAtts=[NSMutableDictionary dictionary];
    selectedAtts[NSFontAttributeName]=[UIFont systemFontOfSize:12];
    selectedAtts[NSForegroundColorAttributeName]=[UIColor greenColor];
    [vc01.tabBarItem setTitleTextAttributes:selectedAtts forState:UIControlStateSelected];

方式二

在 Assets.xcassets文件夹中更改改变之后不用代码并且在所有的控制器里面都会被作用到
具体操作

appearance属性
//    通过appearance统一设置所有的UITabBarItem的文字属性
//    后面带有UI_APPEARANCE_SELECTOR的方法，都可以通过appearance同意设置
例如UITabBarItem的文字属性
案例；

    NSMutableDictionary *atts=[NSMutableDictionary dictionary];
    atts[NSFontAttributeName]=[UIFont systemFontOfSize:12];
    atts[NSForegroundColorAttributeName]=[UIColor grayColor];

    NSMutableDictionary *selectedAtts=[NSMutableDictionary dictionary];
    selectedAtts[NSFontAttributeName]=atts[NSFontAttributeName];
    selectedAtts[NSForegroundColorAttributeName]=[UIColor darkGrayColor];
// 在这里只要更改，所有的文字都改

    UITabBarItem *item=[UITabBarItem appearance];
    [item setTitleTextAttributes:atts forState:UIControlStateNormal];
    [item setTitleTextAttributes:selectedAtts forState:UIControlStateSelected];

    //    添加子控制器
    UIViewController *vc01=[[UIViewController alloc]init];
    vc01.view.backgroundColor=[UIColor redColor];
    vc01.tabBarItem.title=@"精华";
    vc01.tabBarItem.image=[UIImage imageNamed:@"tabBar_essence_icon"];
    UIImage *image=[UIImage imageNamed:@"tabBar_friendTrends_click_icon"];
//    不让tabbar底部有渲染的关键代码
     image=[image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
  vc01.tabBarItem.selectedImage=image;
// 把控制器添加到 UITabBarController里面去
    [self addChildViewController:vc01];

    UIViewController *vc02=[[UIViewController alloc]init];
    vc02.tabBarItem.title=@"新帖";
    vc02.tabBarItem.image=[UIImage imageNamed:@"tabBar_new_click_icon"];
    vc02.tabBarItem.selectedImage=[UIImage imageNamed:@"tabBar_new_click_icon"];
    vc02.view.backgroundColor=[UIColor cyanColor];
    [self addChildViewController:vc02];

    UIViewController *vc03=[[UIViewController alloc]init];
    vc03.view.backgroundColor=[UIColor blueColor];
    vc03.tabBarItem.title=@"关注";
    vc03.tabBarItem.image=[UIImage imageNamed:@"tabBar_friendTrends_icon"];
    vc03.tabBarItem.selectedImage=[UIImage imageNamed:@"tabBar_friendTrends_click_icon"];
    [self addChildViewController:vc03];

    UIViewController *vc04=[[UIViewController alloc]init];
    vc04.tabBarItem.title=@"我";
    vc04.tabBarItem.image=[UIImage imageNamed:@"tabBar_me_icon"];
    vc04.tabBarItem.selectedImage=[UIImage imageNamed:@"tabBar_me_click_icon"];
    vc04.view.backgroundColor=[UIColor yellowColor];
    [self addChildViewController:vc04];

原标题：iOS更改tabbar图片渲染 —不让tabbat有蓝色的渲染并修改文字

关键词：IOS