UITabBar

UITabBar
需要创建多个ViewController

import “AppDelegate.h”

import “FirstViewController.h”

import “TwoViewController.h”

import “ThreeViewController.h”

import “FourViewController.h”

import “FiveViewController.h”

import “sixViewController.h”

@interface AppDelegate ()

@end

@implementation AppDelegate

• (void)dealloc
  {
  [_window release];
  [super dealloc];
  }

• (BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions {
  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  // Override point for customization after application launch.
  self.window.backgroundColor = [UIColor whiteColor];
  [self.window makeKeyAndVisible];
  [_window release];

  // 创建第一个视图控制器对象
  FirstViewController *firstVC=[[FirstViewController alloc] init];
  // 创建第一个naVC
  UINavigationController *firstNaVC=[[UINavigationController alloc] initWithRootViewController:firstVC];
  // 创建tabbar上的按钮及其内容
  firstVC.tabBarItem=[[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:1000] autorelease];
  firstVC.tabBarItem.badgeValue=@”+99”;

  // 创建第二个
  TwoViewController *twoVC=[[TwoViewController alloc] init];
  UINavigationController *twoNaVC=[[UINavigationController alloc] initWithRootViewController:twoVC];
  twoVC.tabBarItem=[[[UITabBarItem alloc] initWithTitle:@”网易” image:[UIImage imageNamed:@”6.png”] selectedImage:[UIImage imageNamed:@”5.png”]] autorelease];

  // 创建第三个
  ThreeViewController *threeVC=[[ThreeViewController alloc] init];
  UINavigationController *threeNaVC=[[UINavigationController alloc] initWithRootViewController:threeVC];
  threeVC.tabBarItem=[[[UITabBarItem alloc] initWithTitle:@”添加” image:[UIImage imageNamed:@”1.png”] tag:1002] autorelease];

  // 创建第四个
  FourViewController *fourVC=[[FourViewController alloc] init];
  UINavigationController *fourNaVC=[[UINavigationController alloc] initWithRootViewController:fourVC];
  fourVC.tabBarItem=[[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemContacts tag:1003] autorelease];

  // 创建第五个
  FiveViewController *fiveVC=[[FiveViewController alloc] init];
  UINavigationController *fiveNaVC=[[UINavigationController alloc] initWithRootViewController:fiveVC];
  fiveVC.tabBarItem=[[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:1004] autorelease];

  // 创建第六个
  sixViewController *sixVC=[[sixViewController alloc] init];
  UINavigationController *sixNaVC=[[UINavigationController alloc] initWithRootViewController:sixVC];
  sixVC.tabBarItem=[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:1005];

pragma mark 按钮创建好了,然后创建一个UITabbarController让所有的按钮显示出来

UITabBarController *tabVC=[[UITabBarController alloc] init];
// tabbarController通过一个数组来管理所有要显示出来的naVC
tabVC.viewControllers=@[firstNaVC,twoNaVC,threeNaVC,fourNaVC,fiveNaVC,sixNaVC];
self.window.rootViewController=tabVC;

// 对tabbar进行外观设置
tabVC.tabBar.translucent=NO;
// 背景颜色
tabVC.tabBar.barTintColor=[UIColor orangeColor];
// 点击之后的选中按钮的颜色
tabVC.tabBar.tintColor=[UIColor redColor];

// 设置代理人
tabVC.delegate=self;

// 点击进去在哪一个图标,从0开始的
tabVC.selectedIndex=0;

// 释放
[tabVC release];
[firstNaVC release];
[twoNaVC release];
[threeNaVC release];
[fourNaVC release];
[fiveVC release];
[sixNaVC release];
[firstVC release];
[twoVC release];
[threeVC release];
[fourVC release];
[fiveVC release];
[sixVC release];


return YES;

}

-(void)tabBarController:(UITabBarController )tabBarController didSelectViewController:(UIViewController )viewController{
// 点哪一个都带一个圈,不好看,不用
// viewController.tabBarItem.badgeValue=@”“;

viewController.tabBarItem.badgeValue=nil;

}