用代码创建UITabBarController

第一种不需要自定义tabBar  可以在按下面方法创建

/  Copyright (c) 2014年itcast. All rights reserved.

//

#import"CZAppDelegate.h"

#import"CZOneViewController.h"

#import"CZTwoViewController.h"

@implementationCZAppDelegate

/**

iOS7 view的frame: (0,0,320,480)

iOS6 view的frame: (0,0,320,411)从状态栏下方开始计算坐标

UITabBar高度是49

*/

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

{

self.window= [[UIWindowalloc]initWithFrame:[UIScreenmainScreen].bounds];

self.window.backgroundColor= [UIColorwhiteColor];

UITabBarController*tab = [[UITabBarControlleralloc]init];

//第一种方式

CZOneViewController*one = [[CZOneViewControlleralloc]init];

one.title=@"第一个";

//设置图像

one.tabBarItem.image= [UIImageimageNamed:@"tab_buddy_nor"];

//设置数字

one.tabBarItem.badgeValue=@"100";

CZTwoViewController*two = [[CZTwoViewControlleralloc]init];

two.tabBarItem.image= [UIImageimageNamed:@"tab_me_nor"];

two.title=@"第二个";

//    [tab addChildViewController:one];

//    [tab addChildViewController:two];

tab.viewControllers=@[one, two];

self.window.rootViewController= tab;

[self.windowmakeKeyAndVisible];

returnYES;

第二种如果要自定义tabBar

1.先创建一个继承UITabBarController的控制器

2.设置UIWindow的根控制器为继承UITabBarController的控制器

#import"XZAppDelegate.h"

#import"XZTabBarViewController.h"

@implementationXZAppDelegate

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

{

self.window= [[UIWindowalloc]initWithFrame:[UIScreenmainScreen].bounds];

self.window.backgroundColor= [UIColorwhiteColor];

XZTabBarViewController*tab = [[XZTabBarViewControlleralloc]init];

self.window.rootViewController= tab;

[self.windowmakeKeyAndVisible];

returnYES;

}

3.在继承UITabBarController的控制器中创建子控制器

//  XZTabBarViewController.m

//手码自定义TabBar

//

//  Created by chao on 14-8-19.

//  Copyright (c) 2014年chao. All rights reserved.

//

#import"XZTabBarViewController.h"

#import"XZOneViewController.h"

#import"XZTwoViewController.h"

#import"XZThreeViewController.h"

#import"XZFrourViewController.h"

#import"XZFiveViewController.h"

@interfaceXZTabBarViewController()

@property(nonatomic,strong)UIButton*selectedButton;

@end

@implementationXZTabBarViewController

- (void)loadView

{

[superloadView];

//创建子控制器

XZOneViewController*one = [[XZOneViewControlleralloc]init];

XZTwoViewController*two = [[XZTwoViewControlleralloc]init];

XZThreeViewController*thr = [[XZThreeViewControlleralloc]init];

thr.view.backgroundColor= [UIColorpurpleColor];

XZFrourViewController* fro = [[XZFrourViewControlleralloc]init];

XZFiveViewController*fiv = [[XZFiveViewControlleralloc]init];

//添加到tabBar的子控制器数组中它会按添加先后顺序排列

// ****注意要先子控制器再自定义他的按钮添加到tabBar上

// tabBar是UITabBarController下的整个工具条

// UITabBarButton是tabBar工具条中的每一个按钮

//每一个UITabBarButton显示什么内容由,由对应子控制器的tabBarItem属性来决定

//详见**UITabBarController简单介绍**

self.viewControllers=@[one, two, thr, fro, fiv];

CGRecttab =self.tabBar.bounds;

CGFloatw = tab.size.width/5;

CGFloath = tab.size.height;

CGFloaty =0;

for(inti =0; i <5; i++) {

UIButton*btn = [[UIButtonalloc]init];

CGFloatx = i * w;

btn.frame=CGRectMake(x, y, w, h);

NSString*imageName = [NSStringstringWithFormat:@"TabBar%d", i+1];

NSString*imageSelName = [imageNamestringByAppendingString:@"Sel"];

[btnsetBackgroundImage:[UIImageimageNamed:imageName]forState:UIControlStateNormal];

[btnsetBackgroundImage:[UIImageimageNamed:imageSelName]forState:UIControlStateSelected];

[self.tabBaraddSubview:btn];

btn.tag= i;

[btnaddTarget:selfaction:@selector(click:)forControlEvents:UIControlEventTouchDown];

if(i ==0) {

[selfclick:btn];

}

}

}

- (void)click:(UIButton*)btn

{

if(self.selectedButton== btn)return;

self.selectedButton.selected=NO;

btn.selected=YES;

self.selectedButton= btn;

self.selectedIndex= btn.tag;

}

@end