如何将用户在应用程序中拍摄的图像保存到UIImages数组中?斯威夫特 4.

Question

我有一个简单的应用程序，用户点击一个按钮来调出一个相机，然后他拍一张照片，我希望这张照片被附加到UIImages对象数组中。我制作了一个我不确定它是否有效的版本。波纹管是我写的代码：

主图片VC：

import UIKit
import RealmSwift
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
// var realm: Realm!
var photoArray = [PhotoArray]()
@IBOutlet weak var imageView: UIImageView!
let imagePicker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
// realm = try! Realm()
imagePicker.delegate = self
imagePicker.sourceType = .camera
imagePicker.allowsEditing = false
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let userPickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
//            let imageToUse = PhotoArray()
//            let data = UIImagePNGRepresentation(userPickedImage) //here convert to data
PhotoArray().photosArray.append(userPickedImage)  //append converted data in array
imageView.image = userPickedImage
}
//        print(PhotoArray().photosArray.count)
imagePicker.dismiss(animated: true, completion: nil)
}
@IBAction func cameraButtonPressed(_ sender: UIButton) {
present(imagePicker, animated: true, completion: nil)
}
}

我试图通过在tableView控制器上显示来证明我正在保存图像，但它不起作用。(我没有收到错误，但他们只是没有出现( 表视图控制器：

import UIKit
class TableViewController: UITableViewController {
//TableView datasource methods
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
//            cell.textLabel?.text = categoryArray[indexPath.row].name
//            cell.imageView.image = [UIImage, imageNamed: PhotoArray().photosArray.name];
cell.imageView?.image = PhotoArray().photosArray as? UIImage
return cell
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let numberOfRowsInSection = PhotoArray().photosArray
return numberOfRowsInSection.count 
}

}

PhotoArray DataModel：

import Foundation
import UIKit
class PhotoArray: ViewController {
//   var photosArray: [Data] = []
var photosArray: [UIImage] = []
//    var photosArray: [UIImage] = [UIImage(named: "")!]
}

Answer 1

将PhotoArray类更改为单例。

class PhotoArray {
static let sharedInstance = PhotoArray()
var photosArray: [UIImage] = []
}

替换所有PhotoArray()以PhotoArray.sharedInstance控制器并运行代码。

希望它能帮助您解决问题。