在集合视图中选择单元格到新控制器

问题描述 投票:1回答:2

非常新的代码和以编程方式创建项目。我有我的集合视图所有设置,但我无法弄清楚如何告诉特定单元格导航到新的集合视图或详细信息视图。非常困惑和沮丧。任何人都可以帮助我,或者至少指出我正确的方向。请把它愚蠢哈哈。

这是我的主要View控制器

import UIKit



class HomeController: UICollectionViewController, 
UICollectionViewDelegateFlowLayout {


    var Legends: [Legend] = {
    var select1 = Legend()
    select1.thumbnailImageName = "select1thumbnail"
    var select2 = Legend()
    select2.thumbnailImageName = "select2humbnail"

    return[select1, select2]        
}()

    override func viewDidLoad() {
    super.viewDidLoad()
    navigationItem.title = "Choose Selection"
    collectionView.backgroundView = UIImageView(image: UIImage(named: "backgroundlogo"))
    collectionView?.register(VideoCell.self, forCellWithReuseIdentifier: "cellId")
    collectionView.dataSource = self
    collectionView.delegate = self



    }

    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return Legends.count

}
    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellId", for: indexPath) as! VideoCell

    cell.legend = Legends[indexPath.item]       
    return cell

}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width:view.frame.height, height: 150)
    }

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
    return 0

}

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let select2VC = UIViewController()
    navigationController?.navigationBar.tintColor = UIColor.white
    navigationController?.pushViewController(select2VC, animated: true)

 print("selcected")


}

}

这是我的集合视图的swift文件

import UIKit



class VideoCell: UICollectionViewCell {

var legend: Legend? {
    didSet {
        thumbnailImageView.image = UIImage(named: (legend?.thumbnailImageName)!)

    }
}

override init(frame: CGRect) {
    super.init(frame: frame)
    setupViews()
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

let thumbnailImageView: UIImageView = {
    let imageView = UIImageView()
    imageView.backgroundColor = UIColor.darkGray
    imageView.image = UIImage(named:"bgcolor")
    imageView.contentMode = .scaleAspectFit
    imageView.clipsToBounds = true
    imageView.translatesAutoresizingMaskIntoConstraints = false
    return imageView
}()

func setupViews() {
    addSubview(thumbnailImageView)

    addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-16-[v0]-16-|", options: NSLayoutConstraint.FormatOptions(), metrics: nil, views: ["v0": thumbnailImageView]))
    addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-1-[v0]-0-|", options: NSLayoutConstraint.FormatOptions(), metrics: nil, views: ["v0": thumbnailImageView]))

}



}

在第三个文件中我只有这一点代码

import UIKit

    class Legend: NSObject {

    var thumbnailImageName: String?

}

主视图控制器的底部代码确实打印出一个“已选择”,但它会为每个单元格打印出来......我假设每个单元格都需要自己的viewController.swift文件?然后告诉那个swift文件的单元格来显示内容?感谢您的时间。

ios swift cell collectionview
2个回答
0
投票

不,您不需要为每个单元格创建自己的viewController.swift文件。您只需创建一个详细页面屏幕(一个DetailViewController.swift),您需要使用在详细视图控制器上声明的变量传递所选单元格的详细信息。

就像我在演示项目中用你的代码完成了HERE,结果将是:

enter image description here

我所做的是我在storyboard中添加了detailViewController并添加了类文件。和didSelectItemAt看起来像:

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let controller = storyboard.instantiateViewController(withIdentifier: "DetailViewController") as! DetailViewController
    controller.selectedIndex = indexPath.row //pass selected cell index to next view.
    self.navigationController?.pushViewController(controller, animated: true)

}

在这里你可以传递数据与qazxsw poi(这里我传递选定的索引),因为qazxsw poi是controller.selectedIndex = indexPath.row的属性,因为我已经在selectedIndex声明它

DetailViewController

同样,您也可以传递与所选索引相关的其他数据。

有关更多信息,请参阅演示项目


0
投票

如果你想检查什么是卖压。您可以检查按下的类型单元格:

DetailViewController.swift
© www.soinside.com 2019 - 2024. All rights reserved.