我有一个TableView和一个名为Post的标签。我有一个Gesture Tap功能,当用户点击该标签时,被点击的TableView标签会改变颜色。问题是使用tableView回收,如果我沿着tableView向下看,那么其他单元格也会突出显示未被单击。如何修复它以便仅突出显示单击的单元格?这是我的代码
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "UserProfileTVC", for: indexPath) as! UserProfileTVC
cell.post.text = Posts[indexPath.row]
let post_tap = UITapGestureRecognizer(target: self, action: #selector(UserProfileC.post_tapped(sender:)))
cell.post.addGestureRecognizer(post_tap)
return cell
}
func post_tapped(sender:UITapGestureRecognizer) {
let point = CGPoint(x: 0, y: 0)
let position: CGPoint = sender.view!.convert(point, to: self.TableSource)
if self.TableSource.indexPathForRow(at: position) != nil {
sender.view?.backgroundColor = UIColor.blue
}
}
代码再次起作用并突出显示正确的TableCell标签,当向下滚动tableView时,问题是其他tableCells标签也会在不单击的情况下突出显示。
我已使用下面给出的示例更新了代码,但它仍然给出了相同的结果
if let existingRecognizerView = cell.viewWithTag(101) as UIView? {
existingRecognizerView.backgroundColor = UIColor.white
} else {
let post_tap = UITapGestureRecognizer(target: self, action: #selector(UserProfileC.post_tapped(sender:)))
post_tap.view?.tag = 101
cell.post.addGestureRecognizer(post_tap)
}
答案 0 :(得分:1)
在cellForRowAtIndexPath
函数中,您正在使用蓝色背景将已有UITapGestureRecognizer的单元格出列。您需要在其视图中添加一个标记,以便在出列并删除背景颜色时可以访问它。
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "UserProfileTVC", for: indexPath) as! UserProfileTVC
cell.post.text = Posts[indexPath.row]
// Check if we already have a GestureRecognizer view
if let existingRecognizerView = cell.post.viewWithTag(101) {
existingRecognizerView.backgroundColor = UIColor.white
} else {
let post_tap = UITapGestureRecognizer(target: self, action: #selector(UserProfileC.post_tapped(sender:)))
cell.post.addGestureRecognizer(post_tap)
post_tap.view.tag = 101
}
return cell
}
func post_tapped(sender:UITapGestureRecognizer) {
let point = CGPoint(x: 0, y: 0)
let position: CGPoint = sender.view!.convert(point, to: self.TableSource)
if self.TableSource.indexPathForRow(at: position) != nil {
sender.view?.backgroundColor = UIColor.blue
}
}
*注意:从移动设备编码......未针对语法或功能错误进行测试。