iOS 简单创建常用的tabBar

#####iOS初学者 废话不多说 直接上代码，文中看注释

1. 先创建三个tabBar页

2. 在创建tabBar页面

3. 在创建几张tabBar的图片

4. main.m文件

   #import <UIKit/UIKit.h>
   #import "AppDelegate.h"
   
   int main(int argc, char * argv[]) {
       NSString * appDelegateClassName;
       @autoreleasepool {
           // Setup code that might create autoreleased objects goes here.
           appDelegateClassName = NSStringFromClass([AppDelegate class]);
       }
       return UIApplicationMain(argc, argv, nil, appDelegateClassName);
   }
   

5. AppDelegate.m

   #import "AppDelegate.h"
   #import "MyTabBarController.h"
   
   
   @interface AppDelegate ()
   
   
    @end
   
   @implementation AppDelegate
   
   
   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
       
       self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
       self.window.backgroundColor = [UIColor whiteColor];
       MyTabBarController *rootViewContoller = [[MyTabBarController alloc] init];
       self.window.rootViewController =rootViewContoller;
   
       [self.window makeKeyAndVisible];
       return YES;
   }
   @end
   
   

6. AppDelegate.h

   #import <UIKit/UIKit.h>
   
   @interface AppDelegate : UIResponder <UIApplicationDelegate>
   
   @property (strong, nonatomic) UIWindow *window;
   @end
   

7. MyTabBarController.m

   #import "MyTabBarController.h"
   #import "TabOneViewController.h"
   #import "TabTwoViewController.h"
   #import "TabThreeViewController.h"
   
   @interface MyTabBarController ()
   
   @end
   
   @implementation MyTabBarController
   
   
   
   - (void)viewDidLoad {
       [super viewDidLoad];
       /*搭建tabBar结构控制器*/
       [self configureViewControllers];
       
       //自定义TabBar事件
       [self addOnCLick];
   }
   
   - (void)configureViewControllers
   {
    		//为三个tabBar页分配内存 和 初始化
    			  TabOneViewController *TabOneVC = [[TabOneViewController alloc]init];
           TabTwoViewController *TabTwoVC = [[TabTwoViewController alloc]init];
           TabThreeViewController *TabThreeVC = [[TabThreeViewController alloc]init];
          
     //  建立空间大的一个可变数组
           NSArray *vcs = @[TabOneVC,TabTwoVC,TabThreeVC];
           NSArray *itemTitle = @[@"tab1",@"tab2",@"tab3"]; //定义他tabBar的文字
           NSArray *itemImage = @[@"home",@"tab2",@"tab3",]; //未选中的转态图
           NSArray *itemImageActive = @[@"home_active",@"tab2_active",@"tab3_active"];//选中的转态的图
     
           NSMutableArray *navs = [NSMutableArray arrayWithCapacity:vcs.count];
           
     			//   循环控制
           for (int i=0; i<[vcs count]; i++) {
               UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:vcs[i]];
               //未选择的状态图
               navigation.tabBarItem.image = [UIImage imageNamed:itemImage[i]];
          
               //选中的状态图
               UIImage *tabBarSelectedImage = [UIImage imageNamed:itemImageActive[i]];
   
               tabBarSelectedImage = [tabBarSelectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
               [navigation.tabBarItem setSelectedImage:tabBarSelectedImage];
               //设置tabBar字体
               navigation.tabBarItem.title =itemTitle[i];
               [navs addObject:navigation];
           }
       
           //设置字体颜色主题
           UITabBar *tabBar = [UITabBar appearance];
           [tabBar setTintColor:UIColor.blueColor];
       
           self.viewControllers = 和 初始化navs;
   }
   //tabBar的点击事件
   - (void)tabBarButtonClick:(UIControl *)tabBarBtn{
       NSLog(@"subView : %i",tabBarBtn.tag);
   }
   //创建点击tabBar的点击事件
   -(void)addOnCLick{
         int index = 0;
         for (UIButton * subView in self.tabBar.subviews) {
             NSLog(@"subViews : %@",subView);
             if ([subView isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
                 subView.tag = index;
                 index++;
                 //监听tabbar的点击
                 [subView addTarget:self action:@selector(tabBarButtonClick:) forControlEvents:UIControlEventTouchUpInside];
                 
             }
         }
   }
   
   
   @end
   
   

8. MyTabBarController.h

   #import <UIKit/UIKit.h>
   
   NS_ASSUME_NONNULL_BEGIN
   
   @interface MyTabBarController : UITabBarController
   
   
   @end
   
   NS_ASSUME_NONNULL_END
   

好了做完以上步骤就可以看到效果了

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