ios - 从另一个 View Controller 更新/更改数组值

Question

数据模型

class DataImage {
    var userId: String
    var value: Double
    var photo: UIImage?
    var croppedPhoto: UIImage?

init(userId:String, value: Double, photo: UIImage?, croppedPhoto: UIImage?){
    self.userId = userId
    self.value = value
    self.photo = photo
    self.photo = croppedPhoto
   }

}

ViewController(tableView)

var photos = [DKAsset]() //image source
var datas = [DataImage]()
override func viewDidLoad() {
    super.viewDidLoad()
        self.loadDataPhoto()
}

func loadDataPhoto(){
  var counter = 0
    for asset in photos{
        asset.fetchOriginalImageWithCompleteBlock({ image, info in // move image from photos to datas

            let images = image
            let data1 = dataImage(userId: "img\(counter+1)", value: 1.0, photo: images, croppedPhoto: images)
            self.datas += [data1]
            counter++

        })
    }
}

根据该代码，假设我有 5 个数据:

• dataImage(userId: "img1", value: 1.0, photo: images, croppedPhoto: 图片)
• dataImage(userId: "img2", value: 1.0, photo: images, croppedPhoto: 图片)
• dataImage(userId: "img3", value: 1.0, photo: images, croppedPhoto: 图片)
• dataImage(userId: "img4", value: 1.0, photo: images, croppedPhoto: 图片)
• dataImage(userId: "img5", value: 1.0, photo: images, croppedPhoto: 图片)

我从 View Controller 中选择“img3”并成功将其移动到cropviewController

CropViewController

var datasCrop: dataImage?
override func viewDidLoad() {
    super.viewDidLoad()
    if let datasCrop = datasCrop{
        // beforeImage.image = datasCrop.photo
        photoId.text = datasCrop.userId
        self.cropView.imageToCrop = datasCrop.photo

    }
}

@IBAction func handleCropButton(sender: UIButton)
{
    if let croppedImage = cropView.croppedImage()
    {
      croppedImage //theCropped img3's cropped image
    }
 }

在 croppedViewController 中，我裁剪了“img3”图像。

我的问题是，我希望在 datas["img3"] 中更新裁剪后的图像并将其移回 viewController。如何做到这一点？

Answer 1

看，您有数组 datas。您可以执行下一步:

var datas = [DataImage]()
class ViewController: UIViewController {
    override func viewDidLoad() {
        // fill your array with append or addObject
        print(datas) // without "self."
}