toolbar除了可以和navigationController一起用之外，也可以独立用到view里。工具栏UIToolbar – 一般显示在底部，用于提供一组选项，让用户执行一些功能，而并非用于在完全不同的UI界面之间切换；在不同 UI 界面切换，是选项卡 Tab Bar负责的。

1 //  2 //  TWFXToolBarViewController.m  3 //  DemoToolBar  4 //  5 //  Created by Lion User on 13-1-19.  6 //  Copyright (c) 2013年 Lion User. All rights reserved.  7 //  8   9 #import "TWFXToolBarViewController.h" 10  11 @interface TWFXToolBarViewController () 12  13 @end 14  15 @implementation TWFXToolBarViewController 16  17 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 18 { 19     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 20     if (self) { 21         // Custom initialization 22          23         //创建toolbar 24         UIToolbar *toolBar = [[[UIToolbar alloc] initWithFrame:CGRectMake(0.0f, 420.0f, 320.0f, 40.0f) ] autorelease]; 25          26         //创建barbuttonitem 27         UIBarButtonItem *item1 = [[[UIBarButtonItem alloc] initWithTitle:@"收藏" style:UIBarButtonItemStyleBordered target:self action:@selector(test:)] autorelease]; 28          29         //创建barbuttonitem 30         UIBarButtonItem *item2 = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:nil] autorelease]; 31          32         //创建一个segmentController 33         UISegmentedControl *seg = [[[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"牛扒", @"排骨", nil] ] autorelease]; 34          35         //设置style 36         [seg setSegmentedControlStyle:UISegmentedControlSegmentCenter]; 37          38          39         [seg addTarget:self action:@selector(segmentControllerItem:) forControlEvents:UIControlEventValueChanged]; 40          41         //创建一个内容是view的uibarbuttonitem 42         UIBarButtonItem *itemSeg = [[[UIBarButtonItem alloc] initWithCustomView:seg] autorelease]; 43          44         //创建barbuttonitem,样式是flexible,这个种barbuttonitem用于两个barbuttonitem之间 45         //调整两个item之间的距离.flexible表示距离是动态的,fixed表示是固定的 46         UIBarButtonItem *flexible = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil] autorelease]; 47          48         //把item添加到toolbar里 49         [toolBar setItems:[NSArray arrayWithObjects:item1,flexible,itemSeg,flexible,item2, nil] animated:YES]; 50          51         //把toolbar添加到view上 52         [self.view addSubview:toolBar]; 53          54     } 55     return self; 56 } 57  58 - (void)viewDidLoad 59 { 60     [super viewDidLoad]; 61     // Do any additional setup after loading the view from its nib. 62 } 63  64 -(void)test:(id)sender 65 { 66     UIBarButtonItem *item = (UIBarButtonItem *) sender; 67     NSString *title = [NSString stringWithFormat:@"%@ 被选中了",item.title]; 68      69     UIAlertView *alertView = [[[UIAlertView alloc] initWithTitle:@"Attention" message:title delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil] autorelease]; 70      71     [alertView show]; 72 } 73  74  75 -(void)segmentControllerItem:(id)sender 76 { 77     UISegmentedControl *seg = (UISegmentedControl *) sender; 78     NSInteger index = seg.selectedSegmentIndex; 79     NSString *message; 80     if (index == 0) { 81         message = @"你选了牛扒"; 82     } 83     else 84     { 85         message = @"你选了排骨"; 86     } 87      88     UIAlertView *alertView = [[[UIAlertView alloc] initWithTitle:@"Attenton" message:message delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil] autorelease]; 89      90     [alertView show]; 91 } 92  93 - (void)didReceiveMemoryWarning 94 { 95     [super didReceiveMemoryWarning]; 96     // Dispose of any resources that can be recreated. 97 } 98  99 - (IBAction)goBack:(UIButton *)sender {100     101     [self dismissViewControllerAnimated:YES completion:nil];102 }103 @end