如何在UIAlertViewController中添加UICollectionView？

Question

在stackoverflow How to add UITableView in a UIAlertView in swift和How to add a UITableView inside the UIAlertView in iPhone?上有类似的问题，但我在UIAlertViewController中添加了UICollectionView，我正在崩溃

  

由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [UICollectionView视图]：无法识别的选择器发送到实例0x103808200＆＃39;

我在Code

下面使用

class NewProjectViewController: UIViewController {
    var iconCollectionView:UICollectionView!
    @IBAction func projectIconAction(_ sender: UIButton) {
        selectIcon()
    }
}

extension NewProjectViewController:UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout
{
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return Constant.iconArray.count
    }

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

        cell.backgroundColor = UIColor.blue
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
    {
        return CGSize(width: 50, height: 50)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets
    {
        return UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
    }

    func selectIcon() {

        let flowLayout = UICollectionViewFlowLayout()
        iconCollectionView = UICollectionView(frame: self.view.bounds, collectionViewLayout: flowLayout)
        iconCollectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        iconCollectionView.delegate = self
        iconCollectionView.dataSource = self

        let alertController:UIAlertController = UIAlertController(title: "ICON", message: "", preferredStyle: UIAlertControllerStyle.alert)
        alertController.addAction(UIAlertAction(title: "Select", style: UIAlertActionStyle.default, handler: { (action) in
            print("Icon Selected")
        }))
        alertController.setValue(iconCollectionView, forKey: "contentViewController")
        alertController.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.destructive, handler: nil))
        self.present(alertController, animated: true, completion: nil)
    }

}

请让我知道我在这里做错了什么

编辑1： 如果我使用波纹管代码将UICollectionViewController作为子视图添加到UIAlertController，那么我就像屏幕截图一样出来了

func selectIcon() {

        let flowLayout = UICollectionViewFlowLayout()
        iconCollectionView = UICollectionView(frame: CGRect(x: 0, y: 80, width: 300, height: 300), collectionViewLayout: flowLayout)
        iconCollectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        iconCollectionView.delegate = self
        iconCollectionView.dataSource = self

        let alertController:UIAlertController = UIAlertController(title: "ICON", message: "", preferredStyle: UIAlertControllerStyle.alert)
        alertController.addAction(UIAlertAction(title: "Select", style: UIAlertActionStyle.default, handler: { (action) in
            print("Icon Selected")
        }))
//        alertController.setValue(iconCollectionView, forKey: "contentViewController")
        alertController.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.destructive, handler: nil))
        alertController.view.addSubview(iconCollectionView)
        self.present(alertController, animated: true, completion: nil)
    }

Answer 1

不幸的是，Apple UIAlertController无法做到这一点。作为您链接的问题的答案建议，您需要创建自定义视图来执行此操作。

你可以自己做，（参考其他答案），或者你可以使用许多库。

我之前亲自使用了this，并且取得了很大的成功。

祝你好运！