Question

我想使用设备的相机拍摄照片。我希望使用segue将图像传递到另一个viewcontroller。图像只需要显示在第二个viewcontroller中。但是图像需要保存到设备的照片库中。我怎样才能使用imagepicker来实现这个目标？

我试过的代码如下所示

 func takePhoto(sender : UIButton)
 {
    if (UIImagePickerController.isSourceTypeAvailable(.Camera))
    {
        if UIImagePickerController.availableCaptureModesForCameraDevice(.Rear) != nil {
            imagePicker.allowsEditing = false
            imagePicker.sourceType = .Camera
            imagePicker.cameraCaptureMode = .Photo
            presentViewController(imagePicker, animated: true, completion: {})
        } else {
            print("Rear camera doesn't exist Application cannot access the camera.")
        }
    } else {
        print("Camera inaccessable Application cannot access the camera.")
    }

 }

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?)
{
    TakenImage = image
    let selectorToCall = Selector("imageWasSavedSuccessfully:didFinishSavingWithError:context:")
    UIImageWriteToSavedPhotosAlbum(TakenImage!, self, selectorToCall, nil)

}

func imagePickerControllerDidCancel(picker: UIImagePickerController)
{
    print("User canceled image")
    dismissViewControllerAnimated(true, completion: {
        // Anything you want to happen when the user selects cancel
    })
}

TakenImage传递给下一个viewcontroller。但是图像没有出现在那里。图像也没有保存库

用于传递的代码如下所示

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
    if (indexPath.row == 0)
    {
    let controller = self.storyboard!.instantiateViewControllerWithIdentifier("NoteDetailViewController") as! NoteDetailViewController
        controller.takinPhoto = true
        if(noteAlreadyEntered == true)
        {
            if (note != "")
            {
                controller.content = note
            }
            controller.takenImage = TakenImage
            if (self.tags != "")
            {
                controller.tagsTextField.text = self.tags
            }
        }
        else
        {
            controller.takenImage = TakenImage
            if (self.tags != "")
            {
                controller.tagsTextField.text = self.tags
            }
        }

    self.navigationController!.pushViewController(controller, animated: true)
    }
}

如何解决此错误？

Answer 1

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

        let image = info[UIImagePickerControllerOriginalImage] as? UIImage 
        self.imagePickerController.dismissViewControllerAnimated(true, completion: nil)
}

使用prepareforsegue传递图像：

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "yoursegueidentifier" {

            let dvc = segue.destinationViewController as! yourViewController
            dvc.image = image
        }
    }

Answer 2

如果从图库中点击或选择图像，则需要先识别。如果单击将bool值更改为yes，并使用underwriting代码。这会将您的图片保存在图库中：

func imagePickerController（picker：UIImagePickerController，didFinishPickingMediaWithInfo info：[String：AnyObject]） { picker .dismissViewControllerAnimated（true，completion：nil）

    imageCLicked  = info[UIImagePickerControllerOriginalImage] as? UIImage

让imageData = UIImageJPEGRepresentation（imageCLicked，0.6） let compressedJPGImage = UIImage（data：imageData！） ALAssetsLibrary（）。writeImageToSavedPhotosAlbum（compressedJPGImage！.CGImage，orientation：ALAssetOrientation（rawValue：compressedJPGImage！.imageOrientation.rawValue）！ completionBlock：{（路径：NSURL！，错误：NSError！） - ＆gt;无效 print（“（path）”）//在这里，你将获得你的路径 }） }

希望它适合你。

如何拍照并将其传递给另一个viewcontroller

2 个答案: