UI控件（UIToolbar）

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    _toolbar = [[UIToolbar alloc]init];
    _toolbar.frame = CGRectMake(0, 0, 320, 45);
    
    //以标题命名的按钮
    _barItem = [[UIBarButtonItem alloc]
        initWithTitle:@"Item1" style:UIBarButtonItemStyleDone target:self action:@selector(doClick)];
    
    //以图片作为背景的按钮
    UIImage *_image = [UIImage imageNamed:@"fresh.png"];
    _barItem1 = [[UIBarButtonItem alloc]
                initWithImage:_image style:UIBarButtonItemStylePlain target:self action:@selector(doClick)];
    
    NSMutableArray *array = [NSMutableArray array];
    [array addObject:_barItem];
    [array addObject:_barItem1];
    
    //在工具栏中添加按钮
    [_toolbar setItems:array animated:YES];
    
    [self.view addSubview:_toolbar];
    
}

-(void)doClick{
    NSLog(@"doClick");
}

@end