可以直接看代码，可以直接复制，自己运行：

VlinkageViewController.h(实现UITabBarDelegate)

VlinkageViewController.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
//
//  VlinkageViewController.h
//  xunYi
//
//  Created by david on 13-5-3.
//  Copyright (c) 2013年 david. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface VlinkageViewController : UIViewController<UITabBarDelegate>

@property (nonatomic, retain) UITabBar *tabBar;

@end

VlinkageViewController.m（关键一点是要实现[self.tabBar setDelegate:self]，不然不起作用的）

VlinkageViewController.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
//
//  VlinkageViewController.m
//  xunYi
//
//  Created by david on 13-5-3.
//  Copyright (c) 2013年 david. All rights reserved.
//

#import <QuartzCore/QuartzCore.h>
#import "VlinkageViewController.h"

@interface VlinkageViewController ()


@end

@implementation VlinkageViewController

@synthesize tabBar;

- (void)viewDidLoad
{
    [super viewDidLoad];
    //判断机体的宽度和高度
    CGRect screenBounds = [[UIScreen mainScreen] bounds];
    CGFloat width = screenBounds.size.width;
    CGFloat height = screenBounds.size.height;
#pragma 添加tabBar
    CGFloat tabBarHeight = 40;
    CGFloat tabBarY = height  - tabBarHeight - searchBar.frame.size.height / 2;
    self.tabBar = [[UITabBar alloc] initWithFrame:
                          CGRectMake(0, tabBarY, width, tabBarHeight)];
    [self.tabBar setDelegate:self];
    
    //设置切换title
    UITabBarItem *tabBarItem1 = [[UITabBarItem alloc] initWithTitle:@"查找" image:nil tag:0];
    UITabBarItem *tabBarItem2 = [[UITabBarItem alloc] initWithTitle:@"我的关注" image:nil tag:1];
    UITabBarItem *tabBarItem3 = [[UITabBarItem alloc] initWithTitle:@"咨询" image:nil tag:2];
    UITabBarItem *tabBarItem4 = [[UITabBarItem alloc] initWithTitle:@"更多" image:nil tag:3];

    NSLog(@"tabBarItem1.tag = %d",tabBarItem1.tag);
    NSLog(@"tabBarItem1.tag = %d",tabBarItem2.tag);
    NSLog(@"tabBarItem1.tag = %d",tabBarItem3.tag);
    NSLog(@"tabBarItem1.tag = %d",tabBarItem4.tag);
    
    //数组形式添加进 tabBar
    NSArray *tabBarItemArray = [[NSArray alloc]
                                initWithObjects:tabBarItem1, tabBarItem2, tabBarItem3, tabBarItem4, nil];
    [self.tabBar setItems:tabBarItemArray];
    [self.view addSubview:self.tabBar];
    
}

-(void) tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
    NSLog(@"item.tag= %d", item.tag);
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
@end