UITableView分页 - 底部刷新以在Swift中加载新数据 [英] UITableView Pagination - Bottom Refresh to Load New Data in Swift

问题描述

我正在尝试使用分页从后端加载数据。我已经看到了这个，但它加载了所有数据，然后是时间。这是正确的方法还是我做错了什么？

I am trying to implement loading data from my backend with pagination. I have seen this, but it loads all the data, all then time. Is this the right way or am I doing something wrong?

提前致谢。

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
    let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell

    print(indexPath.row)

    if (indexPath.row + 1 < self.TotalRowsWithPages) {
        cell.textLabel?.text = "\(self.myarray!.[indexPath.row].body)"
    } else {

        cell.textLabel?.text = "Loading more data...";

        // User has scrolled to the bottom of the list of available data so simulate loading some more if we aren't already
        if (!self.isLoading) {
            self.isLoading = true;
            self.TotalRowsWithPages = self.TotalRowsWithPages + self.PageSize
            self.getmoredata()
        }
    }

    return cell
}

推荐答案

不，你不能采用这种方法，因为<多次调用code> cellForRowAtIndexPath 并且还需要很长时间来检查你的条件！

Nope, you can't go with that approach because cellForRowAtIndexPath is called many times and also it will take much time to check your conditions!

在这里，我找到了一个更好的选择 UITableView 分页。

Here, I have found a better option for UITableView pagination.

func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {

    //Bottom Refresh

    if scrollView == tableView{

        if ((scrollView.contentOffset.y + scrollView.frame.size.height) >= scrollView.contentSize.height)
        {
            if !isNewDataLoading{

                if helperInstance.isConnectedToNetwork(){

                    isNewDataLoading = true
                    getNewData()
                }
            }
        }
    }
}

isNewDataLoading 是 Bool 检查 UITableView 正在加载新数据！

isNewDataLoading is Bool to check that UITableView is loading new data or not!

希望这会有所帮助！

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