Question

我是swift的初学者。我想从tableviewcell调用collectionview。

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let window = UIWindow(frame: UIScreen.mainScreen().bounds)
    let layout = UICollectionViewLayout()
    let detailColorView = ColorCollectionView(collectionViewLayout: layout)

    switch indexPath.row {
    case 0:
        detailColorView.bkColor = UIColor.redColor()
    case 1:
        detailColorView.bkColor = UIColor.greenColor()
    case 2:
        detailColorView.bkColor = UIColor.blueColor()
    default:
        detailColorView.bkColor = UIColor.blackColor()
    }
    window.rootViewController = UINavigationController(rootViewController: detailColorView)
    self.navigationController?.pushViewController(detailColorView, animated: true)
}

这是以编程方式创建的collectionviewController。

    import UIKit

    private let reuseIdentifier = "Cell"

    class ColorCollectionView: UICollectionViewController, UICollectionViewDelegateFlowLayout {

var bkColor: UIColor!

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationItem.title = "Select a color"
    if bkColor != nil{
        collectionView?.backgroundColor = bkColor
    }else{
        collectionView?.backgroundColor = UIColor.blackColor()
    }


    self.collectionView?.registerClass(ColorCell.self, forCellWithReuseIdentifier: reuseIdentifier)
}
override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 1
}
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 10
}

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! ColorCell

    return cell
    }
    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
        return CGSize(width: view.frame.width, height: 100)
    }

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

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

func setupViews()
{
    backgroundColor = UIColor.whiteColor()
}




}

但是在运行之后，单击tableviewcell时，会出现collectionview，但是自定义单元格没有出现任何错误或问题。

我想通过快速编程经验来解决问题。感谢

Answer 1

代码看起来不错，但我认为您仍然需要在课程顶部添加UICollectionViewDataSource。

class ColorCollectionView: UICollectionViewController, UICollectionViewDelegateFlowLayout, HERE {

以后添加：

self.collectionView.dataSource = self;

进入viewDidLoad()

Swift：CollectionViewCell没有出现在以编程方式创建的UICollectionViewController错误

1 个答案: