尝试在 UICollectionViewCell 类上使用照片库

Question

所以现在我正在尝试让集合视图单元格使用照片库来更新照片。这是我的代码：

import UIKit

class viewCellVC: UICollectionViewCell, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet var bookImage: UIImageView!
@IBAction func addImage(_ sender: Any) {
    let imagePicker = UIImagePickerController()
    imagePicker.delegate = self
    imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    imagePicker.allowsEditing = false
    self.window?.rootViewController?.present(imagePicker, animated: true, completion: nil)
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    picker.dismiss(animated: true, completion: nil)
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let image = info[UIImagePickerControllerOriginalImage] as! UIImage
    bookImage.image = image
    picker.dismiss(animated: true, completion: nil)
}


}

但是，当我尝试运行代码并更新图片时，模拟器无法打开照片库，而是收到以下错误消息（没有结束应用程序，只是无法运行照片库）：

2017-08-07 21:35:31.709183-0500 ChuBookElf[2817:66569] Warning: Attempt to present <UIImagePickerController: 0x7f907e0bf800> on <ChuBookElf.ViewController: 0x7f907de072c0> whose view is not in the window hierarchy!

谁能告诉我我做错了什么？我已经做了好几个小时了。

For Reference, here is what the collection view cell looks like

Answer 1

对于初学者，您是在 UICollectionViewCell 中创建 imagePicker。

您应该在包含上述UICollectionView 以及委托方法的ViewController 中创建imagePicker。然后，在didFinishPickingMediaWithInfo 中，将所选图像设置为适当的collectionViewCell 和reload 你的collectionView