ios - 如何在 UIAlertViewController 中添加 UICollectionView？

Question

stackoverflow上也有类似的问题How to add UITableView in a UIAlertView in swift和 How to add a UITableView inside the UIAlertView in iPhone?但是我在 UIAlertViewController 中添加了 UICollectionView 并且我遇到了崩溃

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UICollectionView view]: unrecognized selector sent to instance 0x103808200'

我正在使用下面的代码

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)
    }

}

请告诉我我做错了什么

编辑 1:如果我使用波纹管代码将 UICollectionViewController 作为 subview 添加到 UIAlertController，那么我会像屏幕截图中那样退出

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。正如您链接的问题的答案所暗示的那样，您需要创建一个自定义 View 来执行此操作。

您可以自己执行此操作(请参阅其他答案)，或者，您可以使用许多现有的库。

我个人用过this之前的一个，并取得了巨大的成功。

祝你好运!