选择 didselectitem 后如何从集合视图导航到另一个集合视图

Question

我一直在尝试制作一个项目，其内容应该是 collectionView，在从中选择一个项目后会导航到另一个 collectionView。

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
@IBOutlet weak var myCollectionView: UICollectionView!
var imgURLArray = [String]()

var nameArray = [String]()
final let urlString = "https://unembittered-vector.000webhostapp.com/JSON/alljson.txt"
override func viewDidLoad() {
    super.viewDidLoad()
    self.downloadJsonWithURL()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}
func downloadJsonWithURL() {
    let url = NSURL(string: urlString)
    URLSession.shared.dataTask(with: (url as? URL)!, completionHandler: {(data, response, error) -> Void in

        if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary {
            print(jsonObj!.value(forKey: "Materials")!)

            if let actorArray = jsonObj!.value(forKey: "Materials") as? NSArray {
                for actor in actorArray{
                    if let actorDict = actor as? NSDictionary {
                        if let name = actorDict.value(forKey: "name") {
                            self.nameArray.append(name as! String)
                        }/*
                        if let name = actorDict.value(forKey: "dob") {
                            self.dobArray.append(name as! String)
                        } */
                        if let name = actorDict.value(forKey: "image") {
                            self.imgURLArray.append(name as! String)
                        }

                    }
                }
            }


            OperationQueue.main.addOperation({
                self.myCollectionView.reloadData()
            })
        }
    }).resume()
}


func downloadJsonWithTask() {

    let url = NSURL(string: urlString)

    var downloadTask = URLRequest(url: (url as? URL)!, cachePolicy: URLRequest.CachePolicy.reloadIgnoringCacheData, timeoutInterval: 20)

    downloadTask.httpMethod = "GET"

    URLSession.shared.dataTask(with: downloadTask, completionHandler: {(data, response, error) -> Void in

        let jsonData = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments)

        print(jsonData!)

    }).resume()
}


//Number of views
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

    return imgURLArray.count

}

  //Populate view
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! myCell
    print("test")
    cell.nameLabel.text = nameArray[indexPath.row]
    let imgURL = NSURL(string: imgURLArray[indexPath.row])

    if imgURL != nil {
        print("check")
        let data = NSData(contentsOf: (imgURL as? URL)!)
        //cell.myImageView.image = UIImage(data: data as! Data)
        cell.myImageView.image = UIImage(data: data as! Data)

    }
    else{
        print("error")}
    //cell.myImageView.image = UIImage(named: array[indexPath.row] + ".JPG")
    return cell
}

/*func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let vc = self.storyboard?.instantiateViewController(withIdentifier: "ViewController") as! ViewController
    //vc.imageString = imgURLArray[indexPath.row]
    //vc.nameString = nameArray[indexPath.row]
    //vc.dobString = dobArray[indexPath.row]

    //cell.myImageView.image = UIImage(named: array[indexPath.row] + ".JPG")
    //return cell1

    //self.navigationController?.pushViewController(vc, animated: true)    
}*/
}

Answer 1

以下是一个示例，说明如何实现您正在寻找的内容：

1.故事板

2。查看控制器

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate
{
    override func viewDidLoad()
    {
        super.viewDidLoad()
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
    {
        return 10
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
    {
        return collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
    }

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
    {
        let controller = self.storyboard?.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
        self.navigationController?.pushViewController(controller, animated: true)
    }
}

class SecondViewController: UIViewController, UICollectionViewDataSource
{
    override func viewDidLoad()
    {
        super.viewDidLoad()
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
    {
        return 5
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
    {
        return collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
    }
}

如果您遇到任何问题，请回复。