ios简单制作淘抢购活动 滑动效果

最近做项目要做一个类似淘宝淘抢购 的活动效果，就简单做了一个demo。菜鸟水平～～～～
直接贴代码

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];

    _width = self.view.frame.size.width;

    [self.view addSubview:self.scrollerViewTime];
    self.scrollerViewTime.delegate = self;
    self.scrollerViewTime.contentSize = CGSizeMake(_width * self.arrayTime.count / 5, 0);
    for (NSInteger i = 0; i < self.arrayTime.count; i++) {
        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(_width / 5 * i, 0, _width / 5, 50)];
        button.tag = 100 + i;
        [button setTitle:self.arrayTime[i] forState:UIControlStateNormal];
        button.backgroundColor = [UIColor colorWithWhite:0.2 alpha:1];
        [self.scrollerViewTime addSubview:button];
        [button addTarget:self action:@selector(clcikTimeButton:) forControlEvents:UIControlEventTouchUpInside];
        if (i == 0 || i == 1 || i == self.arrayTime.count - 1 || i == self.arrayTime.count - 2) {
            button.enabled = NO;
        }

    }



    NSDate *date = [NSDate date];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"HH:mm"];
    NSString *time = [formatter stringFromDate:date];
    NSLog(@"%@", time);
//    time = @"20:00";

    for (NSInteger i = 0;  i &