Change UITableViewCell height touch up inside

问题

As the title says, I'd like to make my cells dynamically change height. I try to be as clear that I can. When I touch up inside a cell (prototype cell), the cell change height (from 44 to 88);in the cell there is an UIImage (88px height) partially hidden and where the cell is hidden there is view, touching up starts a segue to a second tableView; when I touch up inside an other cell the previous cell return to 44px height an this other cell change height as the previous one. Follow a scheme of I need to do.

I think that this is quite difficult, so If someone could help me doing this feature I would be very grateful!! or if you know any examples to get ideas (by gitHub for example) please report me! thanks a lot :-)

回答1:

It is not so bad. I have done it like this, there might be smarter ways to do it. The important stuff is tableView.beginUpdate and ....endUpdate.

  //
    //  DynamicTableViewController.swift
    //  DynamicCellTest
    //
    //  Created by Lars Christoffersen on 27/08/15.
    //  Copyright (c) 2015 Lars Christoffersen. All rights reserved.
    //

    import UIKit

    class DynamicTableViewController: UITableViewController {

        var dataCource = ["A","B","C","D","E","F","G","H"]
        var extraHeight:CGFloat?
        var selectedRowIndex:Int?

        override func viewDidLoad() {
            super.viewDidLoad()
        }

        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
        }

        override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {


            if extraHeight != nil && selectedRowIndex != nil && selectedRowIndex == indexPath.row{
                return 41 + extraHeight!
            }else{
                return 41
            }
        }


        override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
            self.tableView.beginUpdates()
            selectedRowIndex = indexPath.row
            extraHeight = 100
            self.tableView.endUpdates()

        }

        override func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
            self.tableView.beginUpdates()
            selectedRowIndex = indexPath.row
            extraHeight = 0
            self.tableView.endUpdates()
        }

        override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
            return 1
        }

        override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
            return dataCource.count
        }


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

            cell.textLabel?.text = dataCource[indexPath.row]
            return cell
        }
    }

来源：https://stackoverflow.com/questions/32238174/change-uitableviewcell-height-touch-up-inside

标签

swift

uitableview

cell

segue

uigesturerecognizer