Question

我有UITableView，每个单元格包含UIImageView和UIButton。我点击按钮后启动相机，我正在尝试更新该单元格的索引路径中的UIImageView。这是我到目前为止所尝试的，但图像没有更新：

import UIKit

class ViewController: UIViewController, UITableViewDelegate, 
UITableViewDataSource, UIImagePickerControllerDelegate, 
UINavigationControllerDelegate {

var objects = ["cup", "phone", "shoe", "tv"]
var images = [UIImage?](repeating:nil, count: 4)
var imageTaken : UIImage!
var imagePicker : UIImagePickerController?
@IBOutlet weak var tableView: UITableView!

@IBAction func TakePhoto(_ sender: UIButton) {
    imagePicker!.sourceType = .camera
    present(imagePicker!, animated: true, completion: nil)
    images[sender.tag] = imageTaken
    self.tableView.reloadData()

}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return objects.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = Bundle.main.loadNibNamed("CustomTableViewCell", owner: self, options: nil)?.first as! CustomTableViewCell

    cell.buttonOutlet.tag = indexPath.row

    cell.buttonOutlet.addTarget(self, action: #selector(ViewController.TakePhoto(_:)), for: .touchUpInside)

    cell.imageFound.image = images[indexPath.row]

    return cell
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {

        self.imageTaken = pickedImage

    }
    dismiss(animated: true, completion: nil)

}

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

    imagePicker = UIImagePickerController()
    imagePicker?.delegate = self
}

}

Answer 1

不要将self.imageTaken定义为UIImage，而是在显示UIImagePickerController时选择保留对indexPath.row的引用，然后在didFinishPickingMediaWithInfo方法中传递图像中的图像根据{{1}}

的数组

类似

indexPath.row

从UITableViewCell启动摄像头后，更新特定UITableViewCell上的图像

1 个答案: