使用 UIImagePickerController“创建具有未知类型的图像格式是一个错误”

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最佳答案

Below mentioned code did solve the problem for me -

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imagePost.image = image
} else{
print("Something went wrong")
}


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

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Add "_" in function parameters.

from

func imagePickerController(picker: UIImagePickerController ...

to

func imagePickerController(_ picker: UIImagePickerController ...

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If you allow editing of the picture imageController.allowsEditing = true then you will need to get the edited image first:

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


if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
imagePost.image = image
} else if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imagePost.image = image
} else {
imagePost.image = nil
}
}

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Remember to add delegate to self

let picker = UIImagePickerController()
picker.delegate = self // delegate added

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According Abdurohman's answer, i change my code and solve the problem,thanks.

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage


photoImageView.image = selectedImage


// Dismiss the picker.
dismiss(animated: true, completion: nil)
}

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This worked for me:

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

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If this helps anyone, I had this happen when I subclassed UIImageView to create a rounded view. It also happened when I added the below line in viewDidLoad()

imageView.layer.cornerRadius = self.imageView.frame.size.width / 2

I ended up adding the line in viewWillLayoutSubViews and it worked. See this for more details:

clipsToBounds causes UIImage to not display in iOS10 & XCode 8

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


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

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The accepted solution by Jeetendra Choudhary works.Although in Xcode 8 with Swift 3 , I noticed that it generates a warning : Instance method 'imagePickerController(_:didFinishPickingMediaWithInfo:)' nearly matches optional requirement 'imagePickerController(_:didFinishPickingMediaWithInfo:)' of protocol 'UIImagePickerControllerDelegate'

and suggests to add either @nonobjc or private keyword to silence the warning.If you silence the warning using these suggestions , the solution no longer works though.

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Be sure to also include theUINavigationControllerDelegate delegate. This solved the issue for me.

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I found the default images in the photo library could couse this problem. If you drag an image from your computor onto the simulator and choose it. this problem is solved

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try below

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
print("image selected");
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImag
self.dismiss(animated: true, completion: nil)
UIImg.image = selectedImage
}

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Change didFinishPickingMediaWithInfo info: [String : AnyObject] , to didFinishPickingMediaWithInfo info: [String : Any]

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This worked for me. Just copy and paste it exactly.

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
// The info dictionary contains multiple representations of the image, and this uses the original.
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage


// Set photoImageView to display the selected image.
photoImageView.image = selectedImage


// Dismiss the picker.
dismiss(animated: true, completion: nil)
}

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What I did was that once I got the image from didFinishPickingMediaWithInfo, I called:

func prepareImageForSaving(image:UIImage) {
// create NSData from UIImage
guard let imageData = UIImageJPEGRepresentation(image, 1) else {
// handle failed conversion
print("jpg error")
return
}


self.saveImage(imageData: imageData as NSData)
}


func saveImage(imageData: NSData) {
imageDatas = imageData
}

to save it in NSData format.

The console still warned me on "[Generic] Creating an image format with an unknown type is an error" but at least my imageView gets updated to the selected image rather than showing the previous one from viewDidLoad.

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Below code did solve the problem:

If user perform changes to selected image pull only that image otherwise pull original image source without any changes and finally dismiss image picker view controller.

public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]){
if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
imageView.image = image
}
else if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imageView.image = image
} else{
print("Something went wrong")
}


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

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For Xcode 8.1 with swift 3, After changing the delegate method as below

change your

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {


imagePost.image = image
self.dismiss(animated: true, completion: nil)
}

function to

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])


{




imagePost.image = info[UIImagePickerControllerOriginalImage] as? UIImage
picker.dismiss(animated: true, completion: nil)


}

I forgot to add UINavigationControllerDelegate along with UIImagePickerControllerDelegate in

class ViewController:UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate

You would have added an variable at the beginning like

var imagePicker = UIImagePickerController()

and setting delegate and call a function in viewdidload() as

 imagePicker.delegate = self
viwImagePick()

Then explain that function as

  //ImagePicker
func viwImagePick(){




let alert = UIAlertController(title: nil, message: "Choose your source", preferredStyle: UIAlertControllerStyle.alert)


alert.addAction(UIAlertAction(title: "Camera", style: UIAlertActionStyle.default) { (result : UIAlertAction) -> Void in
print("Camera selected")
self.openCamera()


//Code for Camera
//cameraf
})
alert.addAction(UIAlertAction(title: "Photo library", style: UIAlertActionStyle.default) { (result : UIAlertAction) -> Void in
print("Photo selected")
self.openGallary()


//Code for Photo library
//photolibaryss
})




self.present(alert, animated: true, completion: nil)
}






func openCamera()
{
imagePicker.sourceType = UIImagePickerControllerSourceType.camera
if UIDevice.current.userInterfaceIdiom == .phone
{
self.present(imagePicker, animated: true, completion: nil)
}
else
{
let popover = UIPopoverController(contentViewController: imagePicker)


popover.present(from: profileImgViw.frame, in: self.view, permittedArrowDirections: UIPopoverArrowDirection.any, animated: true)


}
}


func openGallary()
{
imagePicker.sourceType = UIImagePickerControllerSourceType.savedPhotosAlbum
if UIDevice.current.userInterfaceIdiom == .phone
{
self.present(imagePicker, animated: true, completion: nil)
}
else
{
let popover = UIPopoverController(contentViewController: imagePicker)


popover.present(from: profileImgViw.frame, in: self.view, permittedArrowDirections: UIPopoverArrowDirection.any, animated: true)




}
}

Now the image is added to image view from the library

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Add this to viewDidload()

imagepicker.delegate = self

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I think you are missing a connection between photoImageView and the image.

Take a look my screenshots below:

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I think you are missing a connection between photoImageView and the image.

Take a look my screenshots below:

Good luck!

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// image picker with collection view class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate,UICollectionViewDataSource,UICollectionViewDelegate {

@IBOutlet var img: UIImageView!


@IBOutlet weak var collview: UICollectionView!


var image = NSMutableArray()




let imgpkr = UIImagePickerController()


override func viewDidLoad() {
super.viewDidLoad()


imgpkr.delegate = self
}








@IBAction func btnselect(_ sender: UIButton) {




imgpkr.allowsEditing = true // false
imgpkr.sourceType = .photoLibrary
imgpkr.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
present(imgpkr, animated: true, completion: nil)


}




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


let choose = info[UIImagePickerControllerOriginalImage]as!UIImage
let edit = info[UIImagePickerControllerEditedImage]as!UIImage


img.contentMode = .scaleAspectFit
img.image = edit


//MARK:- Add image in collview


image.add(edit)
collview.reloadData()


dismiss(animated: true, completion: nil)


}


func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {


dismiss(animated: true, completion: nil)
}


//MARK:- Collection View




func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {


return image.count


}


func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {


let cell = collview.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)as! CollectionViewCell1


cell.img1.image = image.object(at: indexPath.item)as! UIImage


return cell






}

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func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imgViewPhoto.image = image
} else{
print("Something went wrong")
}


picker.dismiss(animated: true, completion: nil)


}

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对我来说，我得到了错误:

"fatal error: unexpectedly found nil..."

when you select imagein imagepicker.

To get around the problem, I created the outlet for the imageView again.