创建窗口
self.window=[[UIWindow alloc]init];
self.window.frame=[UIScreen MainScreen].bounds;
self.window.rootViewController=tabBarVc;//设置根控制器
[self.window makeKeyAndVisible];
设置根控制器
UITabBarController *tabBarVc=[[UITabBarController alloc]init];
UITableViewController *vc1=[[UITableViewController alloc]init];
vc1.view.backgroundColor=[UIColor redColor];
vc1.Item.title=@“”;
vc1.Item.image=[UIImage imageNamed:@“”];
[tabBarVc addChildViewController:vc1];
//设置普通状态下的文字属性
NSMutableDictionary *normalAttrs=[NSMutableDictionary dictionary];
normalAttrs[NSFontAttributeName]=[UIFont systemFontSize:20];
normalAttrs[NSForegroundColorAttributeName]=[UIColor redColor];
[vc1.tabBarItem setTitleTextAttributes:normalAttrs forState:UIControlStateNormal];
//设置选中状态文字属性
NSMutableDictionary *selectedAttrs=[NSMutableDictionary dictionary];
selectedAttrs[NSForegroundColorAttributeName]=[UIColor orangeColor];
selectedAttrs[NSFontAttributeName]=[UIFont systemFontSize:20];
[vc1.tabBarItem setTitleTextAttributes:selectedAttrs forState:UIControlStateSelected];
//文字属性- 通过UITabBarItem的appearance对象统一设置
UITabBarItem *item=[UITabBarItem appearance];
//设置普通状态下的文字属性
NSMutableDictionary *normalAttrs=[NSMutableDictionary dictionary];
normalAttrs[NSFontAttributeName]=[UIFont systemFontOfSize:14];
normalAttrs[NSForegroundColorAttributeName]=[UIColor darkGrayColor];
[item setTitleTextAttributes:normalAttrs forState:UIControlStateNormal];
//设置选中状态下的文字属性
NSMutableDictionary *selectedAttrs=[NSMutableDictionary dictionary];
selectedAttrs[NSForegroundColorAttributeName]=[UIColor grayColor];
selectedAttrs[NSFontAttributeName]=[UIFont systemFontOfSize:16];
[item setTitleTextAttributes:selectedAttrs forState:UIControlStateSelected];
设置TabBar图片属性
1.取消图片渲染颜色
UIImage *img=[[UIImage imageNamed:@“”]imageWithRenderingMode:UIImageRenderingModelAlwaysOriginal];
vc1.tabBarItem.selectedImage=img;//设置tabBarItem的选中图片
2.设置UIButtonTypeSystem样式按钮的image时
UIButton *btn=[[UIButton buttonWithType:UIButtonTypeSystem];
[btn setImage:image forState:UIControlStateNormal];
项目图片资源可以利用一个MAC软件解压 https://github.com/devcxm/iOS-Images-Extractor
随机数生成
CGFloat i=arc4random_uniform(100)/100.0;
