tableView.addGestureRecognizer 用于 tableViewController 的一部分 [英] tableView.addGestureRecognizer for one section of the tableViewController

问题描述

我是 iOS 新手，很快.我的 tableView 中有两个部分.我希望能够在第二部分而不是第一部分上执行 longPressGesture，使用户能够重新排序第二部分中的 tableview 单元格.我将如何快速做到这一点?谁能提供一个简单的 Swift 示例代码?

I'm new to iOS, swift. I have two sections in my tableView. I want to be able to do a longPressGesture on the second section, and not the first, enabling the user to reorder tableview cells in the second section. How would I do that in swift? Would anyone kindly provide a simple sample code in Swift?

感谢您的帮助，非常感谢！

Thanks for your help, much appreciated!

推荐答案

如果您只想为特定的移动单元重新排序，您可以添加一些按钮/操作来启用/禁用重新排序，您可以使用委托

If you just want to reorder move the cell for the particular you may add some button/action to enable/disable reorder , there is delegate which you can use

你的代码可以是这样的:

Your code can be like this:

//enable editing in the tableview to true when you want to enable reorder in your case may on the UILongPressGestureRecognizer action
//In viewDidLoad()
tblView.editing = true//set it to false to complete the reorder

委托方法可以这样使用:

The delegate methods can be use like this:

func tableView(tableView: UITableView, editingStyleForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCellEditingStyle {
    return UITableViewCellEditingStyle.None
}

func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
    //get the reorder change in the path, you can do operation on the array 
    let itemToMove:String = arrData[fromIndexPath.row]//get the old path of item
    arrData.removeAtIndex(fromIndexPath.row)//remove item from old path
    arrData.insert(itemToMove, atIndex: toIndexPath.row)//at item at new path in array
}

func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {

//编写代码以允许在特定部分/索引路径中重新排序如果 indexPath.section == 0 {返回假} 别的 {返回真}//如果您不希望该项目可重新排序，则返回 false.}

//write code to allow reorder in the particular section/indexpath if indexPath.section == 0 { return false } else { return true } // Return false if you do not want the item to be re-orderable. }

func tableView(tableView: UITableView, targetIndexPathForMoveFromRowAtIndexPath sourceIndexPath: NSIndexPath, toProposedIndexPath proposedDestinationIndexPath: NSIndexPath) -> NSIndexPath {
    //check if the reorder is allow in the particular section/indexpath before the reorder is done, return the old path if you don't want to move at Proposed path
    if sourceIndexPath.section != proposedDestinationIndexPath.section {
        return sourceIndexPath
    } else {
        return proposedDestinationIndexPath
    }
}

<小时>

UILongPressGestureRecognizer 可以根据需求在tableview或tableview cell上实现

---

the UILongPressGestureRecognizer can be implemented on the tableview or the tableview cell based on the requirements

let longpress = UILongPressGestureRecognizer(target:self, action:#selector(HomeScreenTableViewController.longPressGestureRecognized))
tblView.addGestureRecognizer(longpress)

func longPressGestureRecognized() {
    NSLog("Detected")
    tblView.editing = true
}

或在tableview单元格中使用与上述相同的方法

or in tableview cell with same method as above

let longpress = UILongPressGestureRecognizer(target:self, action:#selector(HomeScreenTableViewController.longPressGestureRecognized))
    cell.addGestureRecognizer(longpress)

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