ios - 下拉隐藏导航项时，刷新控件在表格 View 上方留下大间隙

Question

当 ios 版本超过 11 时，下面的代码会发生这种情况。我该如何避免这种情况。我已将刷新控件添加到 TableView 。如果 ios 版本高于 11.0，我想将搜索栏加载到导航栏

    refreshController.addTarget(self, action: #selector(refreshSelector), for: .valueChanged)
    // Add Refresh Control to Table View
if #available(iOS 10.0, *) {
    tableView.refreshControl = refreshController
} else {
    tableView.addSubview(refreshController)
}


         @objc func refreshSelector()
            {
                if(!searchLoaded)
                {
                    searchLoaded = true

                   //self.tableView.tableHeaderView = searchController.searchBar
                    if #available(iOS 11.0, *) {
                        self.navigationItem.searchController = searchController
                    } else {
                        self.tableView.tableHeaderView = searchController.searchBar
                    }
        //           self.refreshController.endRefreshing()

                  //  tableView.setContentOffset(CGPoint.zero, animated: true)
                    print( "Got ya")
                    self.navigationItem.rightBarButtonItem = nil
                }
                refreshController.endRefreshing()
           // self.tableView.scrollToRow(at: IndexPath(row: 1, section: 0), at: UITableViewScrollPosition.top, animated: true)

              //  self.refreshController.removeFromSuperview()


            }

Answer 1

是加入了UIRefreshControl:

试试这个:

// Add Refresh Control to Table View
if #available(iOS 10.0, *) {
    tableView.refreshControl = refreshControl
} else {
    tableView.addSubview(refreshControl)
}

尝试改变:

tableView.addSubview(refreshControl) to 
tableView.backgroundView = refreshControl

我也遇到了这个问题并关注了这个博客:

• > https://cocoacasts.com/how-to-add-pull-to-refresh-to-a-table-view-or-collection-view