한 뷰 컨트롤러에서 다른 뷰 컨트롤러로 이미지를 전달하려고하는데 segue 기능을 준비 할 때 오류가 발생합니다.
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let post = posts[indexPath.row]
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)as? collectionViewCellBooks {
if let img = booksVC.imageCache.object(forKey: post.imageUrl as NSString) {
cell.configureCell(post: post, img: img)
return cell
}else {
cell.configureCell(post: post)
return cell
}
}
else {
return collectionViewCellBooks()
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.performSegue(withIdentifier: "showImage", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "showImage"
{
let indexPaths = self.collectionView!.indexPathsForSelectedItems!
let indexPath = indexPaths[0] as IndexPath
let vc = segue.destination as! newViewController
// vc.image = self.posts[(indexPath as NSIndexPath).row]
vc.image = self.posts[indexPath.row]
}
class newViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
var image = UIImage()
override func viewDidLoad() {
super.viewDidLoad()
self.imageView.image = self.image
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
이것은 내 Post 수업입니다
class Post {
private var _caption: String!
private var _imageUrl: String!
private var _postKey: String!
var caption: String {
return _caption
}
var imageUrl: String {
return _imageUrl
}
var postKey: String {
return _postKey
}
init(caption: String, imageUrl: String) {
self._caption = caption
self._imageUrl = imageUrl
}
init(postKey: String, postData: Dictionary<String, AnyObject>) {
self._postKey = postKey
if let caption = postData["title"] as? String {
self._caption = caption
}
if let imagesUrl = postData["imageURL"] as? String {
self._imageUrl = imagesUrl
}
}
}
title 및 imageURL은 firebase 데이터베이스에 저장됩니다.
준비 방법을 다음과 같이 변경해 주시겠습니까?.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
{
if segue.identifier == "showImage"
{
let indexPaths = self.collectionView!.indexPathsForSelectedItems!
let indexPath = indexPaths[0] as IndexPath
let vc = segue.destinationViewController as! newViewController
let post = posts[indexPath.row]
if let img = booksVC.imageCache.object(forKey: post.imageUrl as NSString) {
vc.image = img
}
}
}
class newViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
var image = nil
override func viewDidLoad() {
super.viewDidLoad()
if self.image {
self.imageView.image = self.image
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
이 기사는 인터넷에서 수집됩니다. 재 인쇄 할 때 출처를 알려주십시오.
침해가 발생한 경우 연락 주시기 바랍니다[email protected] 삭제
몇 마디 만하겠습니다