【iOS开发-78】用代码实现UITabBarController+UINavigationController

#import "WPTabBarController.h"
#import "WPFirstViewController.h"
#import "WPSecondViewController.h"
#import "WPThirdViewController.h"
#import "WPFourthViewController.h"

@interface WPTabBarController ()

@end

@implementation WPTabBarController

- (void)viewDidLoad {
WPFirstViewController *firsVc=[[WPFirstViewController alloc]init];
WPSecondViewController *secondVc=[[WPSecondViewController alloc]init];
WPThirdViewController *thirdVc=[[WPThirdViewController alloc]init];
WPFourthViewController *fourthVc=[[WPFourthViewController alloc]init];

//以下两种方式均可设置tabbar上得标题
firsVc.tabBarItem.title=@"消息";
//firsVc.title=@"消息";
secondVc.tabBarItem.title=@"联系人";
//secondVc.title=@"联系人";
thirdVc.tabBarItem.title=@"动态";
//thirdVc.title=@"动态";
fourthVc.tabBarItem.title=@"设置";
//fourthVc.title=@"设置";

//设置icon
firsVc.tabBarItem.image=[UIImage imageNamed:@"tab_recent_nor"];
secondVc.tabBarItem.image=[UIImage imageNamed:@"tab_buddy_nor"];
thirdVc.tabBarItem.image=[UIImage imageNamed:@"tab_qworld_nor"];
fourthVc.tabBarItem.image=[UIImage imageNamed:@"tab_me_nor"];

firsVc.view.backgroundColor=[UIColor redColor];
secondVc.view.backgroundColor=[UIColor whiteColor];
thirdVc.view.backgroundColor=[UIColor purpleColor];
fourthVc.view.backgroundColor=[UIColor greenColor];

//用以下方式添加子控制器
//self.viewControllers=@[firsVc,secondVc,thirdVc,fourthVc];
[self addChildViewController:firsVc];
[self addChildViewController:secondVc];
[self addChildViewController:thirdVc];
[self addChildViewController:fourthVc];

[super viewDidLoad];
// Do any additional setup after loading the view.
}

核心：
——定义1个tabBat控制器和4个导航控制器，然后通过addChildViewController或者数组的形式把4个导航控制器加到tabBar控制器中。

——每个导航控制器通过tabBarItem属性来设置标题和icon等。

界面截屏：