Question

我一直试图弄清楚这几天。我已经在google和stack中进行了大量的搜索，但是却找不到有用或有意义的东西。我是Swift的新手，但有一些编程背景。

目前应用程序的这一部分拍照，在当前视图控制器（VCPhoto）上显示，移动到另一个控制器，显示动画视图控制器（VCQScan），然后移动到结果视图控制器（VCResult）。我试图将图像从VCPhoto移动到VCResult。我发现的一个答案就是这个答案

Passing Image to another View Controller (Swift)

这在我的代码中，在下一个viewcontroller中返回一个null值。

VCPhoto {

@IBOutlet var butTakePhoto: UIButton!
@IBOutlet var butSkip: UIButton!
@IBOutlet var scanCatB: UIButton!
@IBOutlet var previewPhoto: UIImageView!
let picker = UIImagePickerController()

override func viewDidLoad() {
    super.viewDidLoad()

    butTakePhoto.addTarget(self, action: #selector(VCPhoto.buttonPressed(_:)), for: .touchUpInside)
    butSkip.addTarget(self, action: #selector(VCPhoto.buttonPressed(_:)), for: .touchUpInside)
    scanCatB.addTarget(self, action: #selector(VCPhoto.buttonPressed(_:)), for: .touchUpInside)

    picker.delegate = self
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

public func buttonPressed (_ sender: AnyObject?){

    if sender === butTakePhoto {
        if UIImagePickerController.isSourceTypeAvailable(.camera) {
                picker.allowsEditing = false
                picker.sourceType = UIImagePickerControllerSourceType.camera
                picker.cameraCaptureMode = .photo
                picker.modalPresentationStyle = .fullScreen
            present(picker,animated: true,completion: nil)
        }
    }
    if sender === scanCatB {

        performSegue(withIdentifier: "sSegue", sender: UIButton.self)
    }
    if sender === butSkip {
        performSegue(withIdentifier: "Result", sender: nil)
    }

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

        //butScan.isHidden=false
        //butSkip.isHidden=true
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    if segue.identifier == "sSegue" {
        let dvc = segue.destination as? VCQScan
        dvc?.newImage = previewPhoto.image
    }

VCScan {

@IBOutlet var catScanImage: UIImageView!
@IBOutlet weak var browsingImage: UIImageView!
var newImage: UIImage!


override func viewDidLoad() {
    super.viewDidLoad()

    browsingImage.image = newImage


    Timer.scheduledTimer(timeInterval: 4.0, target: self, selector: #selector(catScan), userInfo: nil, repeats: false)

    catScanImage.animationImages = [
    UIImage(named: "catPerc0.png")!,
    UIImage(named: "catPerc1.png")!,
    UIImage(named: "catPerc2.png")!,
    UIImage(named: "catPerc3.png")!,
    UIImage(named: "catPerc4.png")!
    ]

    catScanImage.animationDuration = 0.4
    catScanImage.startAnimating()
    // Do any additional setup after loading the view, typically from a nib.
}

func catScan() {
    self.performSegue(withIdentifier: "lastSegue", sender: self)
}
func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "lastSegue" {
        let dvc = segue.destination as! VCResult
        dvc.newImage = browsingImage.image
    }
}

}

上面准备的segue试图将它移动到下一个VC，但它没有那么远，它出错了

    browsingImage.image = newImage

在VCQScan中，它似乎没有移动图像，即使我可以在VCPhoto上的调试器中看到它...感谢任何帮助!!!!希望这是足够的信息，如果不让我知道！再说一次，我是Swift和Xcode的新手，所以有可能我错过了一些非常愚蠢的东西......

调试器输出 2017-04-03 20：08：33.637110-0700 OatQuizApp [3314：1066322 [OatQuizApp.VCResult buttonPressed：]：无法识别的选择器发送到实例0x100b1fdb0 2017-04-03 20：08：33.638569-0700 OatQuizApp [3314：1066322] *由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [OatQuizApp.VCResult buttonPressed： ]：无法识别的选择器发送到实例0x100b1fdb0＆＃39; * 第一次抛出调用堆栈：（0x18ca7efd8 0x18b4e0538 0x18ca85ef4 0x18ca82f4c 0x18c97ed2c 0x192be30ec 0x192be306c 0x192bcd5e0 0x192be2950 0x192be246c 0x192bdd804 0x192bae418 0x1933a7f64 0x1933a26c0 0x1933a2aec 0x18ca2d424 0x18ca2cd94 0x18ca2a9a0 0x18c95ad94 0x18e3c4074 0x192c13130 0x1000cf900 0x18b96959c） libc ++ abi.dylib：以NSException类型的未捕获异常终止

Answer 1

我想出了问题..一切都是正确编码的，至少原来是这样。我没有关注UIImageView，我在VCQScan上没有关注，只是添加了一个插座，这就是为什么它出现为null。我出于某种原因认为UIImageView只是带着图像...我想我盯着它看的时间太长了。谢谢你的期待！

如何将UIImage从UIImagePickerController传递到另一个UIViewController？

1 个答案: