ios - 如何使用 swift 4 通过 Image Picker Controller 发送图像数据

Question

我有 tabbarController 和 CameraViewController。单击相机选项卡后，我想显示相机。我已经做了。打开相机后，我想将选择的特定图像显示到下一个 viewController，但无法执行。我正在使用 UIImagePickerController，请帮忙

func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {
    let tabBarIndex = tabBarController.selectedIndex
    if tabBarIndex == 0 {
        //do your stuff
        print("First Tab")
    } else if tabBarIndex == 1 {
        print("Second Tab")
    } else if tabBarIndex == 2 {
        //do the camera stuff here
        let imagePickerController1 = ImagePickerController()
        imagePickerController1.delegate = self
        imagePickerController1.imageLimit = 2
        present(imagePickerController1,animated: true,completion: nil)
        print("camera")
        print("Third Tab")
    }     
}

完成按钮按下代码。

func doneButtonDidPress(_ imagePicker: ImagePickerController, images: [UIImage]) {
    let firstVC = self.storyboard!.instantiateViewController(withIdentifier: "CameraVC") as! CameraVC

    show(firstVC, sender: nil)   
    dismiss(animated: true, completion: nil)
    print("done")
}



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

    }
    dismiss(animated: true, completion: nil)
}

Answer 1

您的doneButtonDidPress 方法是在TabBarController 中实现的，您希望在CameraVC 中选择Images 所以做1 件事添加CameraVC 中的 NotificationCenter 并在完成 Image 后使用 Images array 发布该通知挑选。并从 CameraVC 中的 array 加载选定的 images。

相机VC

NotificationCenter.default.addObserver(self, selector: #selector(updateSelectedImages(_:)), name: NSNotification.Name(rawValue: "updateSelectedImages"), object: nil)


@objc func updateSelectedImages(_ notification: Notification) {
    let imagesInfo = notification.object as? NSDictionary

    self.arrImages = imagesInfo?.value(forKey: "selectedIamges") as! [UIImage]
    self.imageView.image = self.arrImages[0]
    self.imageView1.image = self.arrImages[1]
}

UITabBarController

let dict = NSMutableDictionary()
dict.setValue(images, forKey: "selectedIamges")
NotificationCenter.default.post(name: NSNotification.Name("updateSelectedImages"), object: dict)