//快速添加一个视图控制器

//快速添加一个视图控制器

#import <UIKit/UIKit.h>

@interface UITabBarController (ZJTabBarExtension)

//快速添加一个视图控制器

-(UIViewController*)andViewController:(Class)cls title:(NSString*)title image:(NSString*)image;

@end

@implementation UITabBarController (ZJTabBarExtension)

-(UIViewController*)andViewController:(Class)cls title:(NSString*)title image:(NSString*)image

{

//cls 传入界面所对应的类型

//    创建视图控制器

    UIViewController*vc=[[cls alloc]init];

    vc.title=title;

    UINavigationController*nc=[[UINavigationController alloc]initWithRootViewController:vc];

    nc.tabBarItem.image=[UIImage imageNamed:image];

    

//添加到标签栏中

    NSMutableArray *marr =[[NSMutableArray alloc]initWithArray:self.viewControllers];

    [marr addObject:nc];

    self.viewControllers=marr;

//    返回创建的视图控制器

    

    return vc;

 }

接着在需要添加标签控制器和导航控制器的视图中添加到delegate引入头文件

#import "AppDelegate.h"

#import "LimitViewController.h"

#import "FreeViewController.h"

#import "SaleViewController.h"

#import "TopicViewController.h"

#import "HotViewController.h"

#import "UITabBarController+ZJTabBarExtension.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

//    创建导航栏和标签栏

    [self creatTabBar];

    return YES;

}

-(void)creatTabBar

{

//  AppList()

//    Limit(AppList)

//    Sale(AppList)

//     Free(AppList)

//    Topic(Root)

//    Hot(AppList)

／／以前的繁琐方法

//    LimitViewController*lvc=[[LimitViewController alloc]init];

////    lvc.navigationItem.title=

////    lvc.navigationItem.image=

//    UINavigationController*nc =[[UINavigationController alloc]initWithRootViewController:lvc];

    

    －现在的方法

    UITabBarController *tbc=[[UITabBarController alloc]init];

    [tbc andViewController:[LimitViewController class] title:@"限免" image:@"tabbar_limitfree.png"];

        [tbc andViewController:[SaleViewController class] title:@"降价" image:@"tabbar_reduceprice.png"];

        [tbc andViewController:[FreeViewController class] title:@"免费" image:@"tabbar_appfree.png"];

        [tbc andViewController:[TopicViewController class] title:@"专题" image:@"tabbar_subject.png"];

        [tbc andViewController:[HotViewController class] title:@"热榜" image:@"tabbar_rank.png"];

        self.window.rootViewController=tbc;

    self.window.backgroundColor=[UIColor whiteColor];

    代码量大大减少

}