UITableView的问题:操作仅每隔两秒钟有效

问题描述

我在UITableViewController上遇到问题:出现了表格视图，但是当触摸一个单元格时，didDeselectRowAt将仅每隔第二次被调用一次.有人看到这个代码有问题吗?

I have an issue with the UITableViewController: the table view shows up but didDeselectRowAt will be called only every second time when touching a cell. Does anyone see an issue with this code?

import UIKit
import MediaPlayer


class LibraryTableViewController: UITableViewController{
    let mediaItems = MPMediaQuery.songs().items


    override func viewDidLoad() {
        super.viewDidLoad()
        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
    }


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

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = mediaItems?[indexPath.row].title
        return cell
    }

    override func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        print("table item selected")
        OperationQueue.main.addOperation{
            self.performSegue(withIdentifier: "showPlayer", sender: self)
        }
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "showPlayer"{
            let playerVC = segue.destination as! PlayerViewController
            let indexPath = tableView.indexPathForSelectedRow!
            playerVC.mediaItem = mediaItems?[indexPath.row]
        }
    }
}

推荐答案

将 did De selectRowAt 更改为 didSelectRowAt

Change didDeselectRowAt to didSelectRowAt

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