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2. TextField可以以UIBarButtonItem的自定义视图的方式加入toolbar
3. 三个按钮
4. 将UIBarButtonItem加入toolBar
**/
UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
[self.view addSubview:toolBar];
UITextField *textField = [[UITextField alloc]initWithFrame:CGRectMake(10, 6, 200, 32)];
[textField setBorderStyle:UITextBorderStyleRoundedRect];// 设置边框
[textField setContentVerticalAlignment:UIControlContentVerticalAlignmentCenter];// 设置垂直对齐
[textField setClearButtonMode:UITextFieldViewModeWhileEditing];// 设置清除按钮
[textField setDelegate:self];
UIBarButtonItem *addressItem = [[UIBarButtonItem alloc]initWithCustomView:textField];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRewind target:self action:@selector(todo1)];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithTitle:@"buttonName " style:UIBarButtonItemStyleBordered target:self action:@selector(btClick)];
[toolBar setItems:@[addressItem, item1, item2, item3]];
// 设置状态栏样式，因为改变bar的时候状态栏颜色会默认变成和bar一样的颜色
[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpaque;
UISearchBar *search = [[UISearchBar alloc] init];
search.autoresizingMask = UIViewAutoresizingFlexibleWidth;//可以伸缩的宽度
search.frame = CGRectMake(0, 0, self.view.frame.size.width, kSearchH);
search.delegate = self;
[self.view addSubview:search];
#pragma mark 监听搜索框的文字改变
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
#pragma mark 搜索框开始编辑（开始聚焦）
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
组件_ UIToolbar 与 组件_UISearchBar
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原文地址：http://www.cnblogs.com/linxiu-0925/p/5058177.html
