如何在表格视图中自动滚动？(迅速)

Question

我在表格视图中添加了一个搜索栏,当用户搜索时,我希望表格视图滚动到您键入的文本.

如何使滚动视图自动滚动？

这是我尝试过的,但是我得到一个错误,说Integer不能转换为索引Path.我该怎么办？

self.tableview.scrollToRowAtIndexPath(1, atScrollPosition: UITableViewScrollPosition.Middle, animated: true)

要么

self.tableview.scrollToNearestSelectedRowAtScrollPosition(scrollPosition: UITableViewScrollPosition.Middle, animated: true)

Answer 1

您必须以scrollToRowAtIndexPath下列方式调用该方法:

var indexPath = NSIndexPath(forRow: numberOfRowYouWant, inSection: 0)
self.tableview.scrollToRowAtIndexPath(indexPath, 
               atScrollPosition: UITableViewScrollPosition.Middle, animated: true)

上面的例子假设你只有一个部分.我希望这对你有帮助.

对于Swift 3:

let indexPath = NSIndexPath(item: numberOfRowYouWant, section: 2)
tableView.scrollToRow(at: indexPath as IndexPath, at: UITableViewScrollPosition.middle, animated: true)

Answer 2

对于Swift 4.2(Xcode 12.1):

    let numberOfSections = self.tableView.numberOfSections
    let numberOfRows = self.tableView.numberOfRows(inSection: numberOfSections-1)

    let indexPath = IndexPath(row: numberOfRows-1 , section: numberOfSections-1)
    self.tableView.scrollToRow(at: indexPath, at: UITableView.ScrollPosition.middle, animated: true)

对于Swift 2:

    let numberOfSections = self.tableView.numberOfSections
    let numberOfRows = self.tableView.numberOfRows(inSection: numberOfSections-1)

    let indexPath = IndexPath(row: numberOfRows-1 , section: numberOfSections-1)
    self.tableView.scrollToRow(at: indexPath, at: UITableViewScrollPosition.middle, animated: true)

Answer 3

如果要自动向下滚动:

numberOfSections = tableView.numberOfSections()
let numberOfRows = tableView.numberOfRowsInSection(numberOfSections-1)

var indexPath = NSIndexPath(forRow: numberOfRows, inSection: numberOfSections)
self.tableview.scrollToRowAtIndexPath(indexPath, 
               atScrollPosition: UITableViewScrollPosition.Middle, animated: true)