UIScrollView 平铺几个icon，可不用collect

#define ImageButtonWidth kScreenW / 5#define widgtWidth ImageButtonWidth * 6- (UIScrollView *)categoryView {    if (!_categoryView) {        _categoryView = [[UIScrollView alloc]initWithFrame:CGRectMake(0,self.bannerHeight + Scale(10), kScreenW, Scale(86.0f))];        _categoryView.backgroundColor = [UIColor whiteColor];        _categoryView.contentSize = CGSizeMake(widgtWidth, 86);        _categoryView.showsHorizontalScrollIndicator = NO;        CGFloat itemW = (kScreenW-2*Scale(15))/5.0;        NSArray *titles = @[@"医声直播",@"学术专栏",@"经典病例",@"每日一题",@"学科分类",@"医生工具"];        NSArray *imgs = @[@"home_cate_live",@"home_cate_subject",@"home_cate_case",@"home_cate_score",@"home_cate_cate",@"home_cate_cate"];                for (int i=0; i<titles.count; i++) {            UIButton *btn = [[UIButton alloc]init];            CGFloat btnX = itemW * i + Scale(15);            CGFloat btnY = 10;            btn.frame = CGRectMake(btnX,btnY, itemW, itemW);            btn.tag = 1000 + i;            btn.titleLabel.font = LYFont(Scale(13));            [btn setImage:ImageNamed(imgs[i]) forState:UIControlStateNormal];            [btn setTitle:titles[i] forState:UIControlStateNormal];            [btn setTitleColor:LYHexColor(@"#545454") forState:UIControlStateNormal];            [btn addTarget:self action:@selector(functionBtnClick:) forControlEvents:UIControlEventTouchUpInside];            [_categoryView addSubview:btn];            [btn layoutButtonWithEdgeInsetsStyle:JTButtonEdgeInsetsStyleTop imageTitleSpace:5];                    }            }    return _categoryView;}