Question

我创建了一个自定义表头视图，并以编程方式将其添加到表视图内的表视图控制器中。我设置表格视图滚动时标题视图不会滚动。此外，对于表视图中的每个部分，还有一个节标题。问题是当向下滚动时，表标题视图不会隐藏节标题。在viewdidload中，banner是从UIView继承的自定义类。

- (void)viewDidLoad {
[super viewDidLoad];

self.automaticallyAdjustsScrollViewInsets = NO;
self.tableView.showsVerticalScrollIndicator = NO;
//adjust table view position
self.tableView.tableHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, ScreenWidth, HeadImgHeight)];
self.navigationController.navigationBarHidden = YES;
[self.navigationController setToolbarHidden:NO];
//add table header view
self.banner = [[Banner alloc] initWithFrame:CGRectMake(0, 0, ScreenWidth, HeadImgHeight)];
self.banner.offsetPoint = CGPointMake(ScreenWidth/2, HeadImgHeight-20);
[self.tableView addSubview:self.banner];

另外，由于我希望滚动时标题视图不会消失，我实现了scrollViewDidScrll函数

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{

CGFloat offsetY = scrollView.contentOffset.y;
if (offsetY < 0) {//scroll down
    self.banner.frame = CGRectMake(0, 0, ScreenWidth, HeadImgHeight);
    self.banner.offsetPoint = CGPointMake(ScreenWidth/2, self.banner.frame.size.height-20);

    [self.banner.MonthInComeLabel setFrame:CGRectMake(ScreenWidth/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_ICON_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT, TITLE_WIDTH, TITLE_HEIGHT)];
    [self.banner.MonthOutComeLabel setFrame:CGRectMake(ScreenWidth*3/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_ICON_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT, TITLE_WIDTH, TITLE_HEIGHT)];
    [self.banner.MonthInDetailLabel setFrame:CGRectMake(ScreenWidth/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_DETAIL_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT, TITLE_WIDTH, TITLE_HEIGHT)];
    [self.banner.MonthOutDetailLabel setFrame:CGRectMake(ScreenWidth*3/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_DETAIL_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT, TITLE_WIDTH, TITLE_HEIGHT)];
}else{
    if (offsetY<=30) {
        self.banner.frame = CGRectMake(0, self.tableView.contentOffset.y, ScreenWidth, HeadImgHeight-offsetY);
        self.banner.offsetPoint = CGPointMake(ScreenWidth/2, self.banner.frame.size.height-20);

        [self.banner.MonthInComeLabel setFrame:CGRectMake(ScreenWidth/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_ICON_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-offsetY, TITLE_WIDTH, TITLE_HEIGHT)];
        [self.banner.MonthOutComeLabel setFrame:CGRectMake(ScreenWidth*3/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_ICON_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-offsetY, TITLE_WIDTH, TITLE_HEIGHT)];
        [self.banner.MonthInDetailLabel setFrame:CGRectMake(ScreenWidth/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_DETAIL_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-offsetY, TITLE_WIDTH, TITLE_HEIGHT)];
        [self.banner.MonthOutDetailLabel setFrame:CGRectMake(ScreenWidth*3/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_DETAIL_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-offsetY, TITLE_WIDTH, TITLE_HEIGHT)];
    }else{
        self.banner.frame = CGRectMake(0, self.tableView.contentOffset.y, ScreenWidth, HeadImgHeight-BANNER_FLEXIBLE_LENGTH);
        self.banner.offsetPoint = CGPointMake(ScreenWidth/2, self.banner.frame.size.height-20);

        [self.banner.MonthInComeLabel setFrame:CGRectMake(ScreenWidth/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_ICON_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-BANNER_FLEXIBLE_LENGTH, TITLE_WIDTH, TITLE_HEIGHT)];
        [self.banner.MonthOutComeLabel setFrame:CGRectMake(ScreenWidth*3/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_ICON_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-BANNER_FLEXIBLE_LENGTH, TITLE_WIDTH, TITLE_HEIGHT)];
        [self.banner.MonthInDetailLabel setFrame:CGRectMake(ScreenWidth/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_DETAIL_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-BANNER_FLEXIBLE_LENGTH, TITLE_WIDTH, TITLE_HEIGHT)];
        [self.banner.MonthOutDetailLabel setFrame:CGRectMake(ScreenWidth*3/4 - TITLE_WIDTH/2, HeadImgHeight-MONTH_DETAIL_BOTTOM_MARGIN-TOTAL_OUT_HEIGHT-BANNER_FLEXIBLE_LENGTH, TITLE_WIDTH, TITLE_HEIGHT)];
    }

}

}

[无滚动时的屏幕截图] [1]

[向下滚动屏幕截图，没问题] [2]

screen shot when scroll up, as you can see the section header is over the table header view

有什么想法吗？

当表视图向上滚动时，IOS，表头视图不会隐藏节头

0 个答案: