相关疑难解决方法(0)

我在表头上添加搜索栏并将其浮动在scrollViewDidScroll方法中,但是当我滚动时没有点击搜索栏(即我转到视图并滚动),然后搜索栏不会保持在顶部但它向上滚动表然而,一旦我点击搜索栏并点击搜索栏上的取消按钮,然后如果我滚动表格,搜索栏将保持在顶部.我的代码是 -

-(void)viewDidLoad {
    [super viewDidLoad];

    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
    searchBar.delegate = self;

    searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
    searchDisplayController.delegate = self;
    searchDisplayController.searchResultsDataSource = self;
    searchDisplayController.searchResultsDelegate = self;

    UIView *tableHeaderView = [[UIView alloc] initWithFrame:searchDisplayController.searchBar.frame];
    [tableHeaderView addSubview:searchDisplayController.searchBar];
    [tableView setTableHeaderView:tableHeaderView];

    isSearching = NO;
}

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

    UISearchBar *searchBar = searchDisplayController.searchBar;
    CGRect searchBarFrame = searchBar.frame;

    if (isSearching) {
        searchBarFrame.origin.y = 0;
    } else {
        searchBarFrame.origin.y = MAX(0, scrollView.contentOffset.y + scrollView.contentInset.top);
    }

    searchDisplayController.searchBar.frame = searchBarFrame;
} …