CODEWITHSUNDEEP
iosswift
ARTURO CALVO
ARTURO CALVO

Reputation: 23

UICollectionView not showing images after unhiding it

I have an UICollectionView that starts hidden in the viewDidLoad, then when an image is added with the UIImagePicker delegate the collection goes "unhidden" and then reloads, here is the code below

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
        self.imagesToSend.append(pickedImage)
    }

    self.imagenesCollectionView.isHidden = false
    self.imagenesCollectionView.reloadData()
    dismiss(animated: true, completion:nil)
}

the problem is that when the collection shows it doesn't show any image, I have to add a second image so the image can show, I want the collection to show when there are images and to hide when there aren't images, until now the hiding functionality its working fine, but not the showing one.

Upvotes: 2

Views: 148

Answers (2)

VSMelo
VSMelo

Reputation: 355

Try to use the methods setNeedsLayout or setNeedsDisplay. They are related to the view update, and maybe you need to use them on the collectionView or on the imageView itself.

Upvotes: 0

Dinesh Nagarajan
Dinesh Nagarajan

Reputation: 1243

Try adding 

self.imagenesCollectionView.isHidden = false
self.imagenesCollectionView.reloadData()

in dismiss completion handler. Like

dismiss(animated: true, completion:{
    self.imagenesCollectionView.isHidden = false
    self.imagenesCollectionView.reloadData()
})

Edit 1: Instead of reloading collection view in completion. add collection view reload in viewWillAppear method based on the array data availability.

eg: 

if self.imagesToSend.count > 0 { 
    self.imagenesCollectionView.isHidden = false
    self.imagenesCollectionView.reloadData()
} else {
    self.imagenesCollectionView.isHidden = true
}

Upvotes: 1

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