问题
I am trying to preview the pdf and ppt documents coming from the remote urls and I am using QuickLookPreviewController to preview documents. So far I am able to preview pdfs and videos but when I open the ppt it opens the quickLookController and instead of the ppt preview I am seeing nothing
I don't know if this is the problem with QLPreviewController or there is some extra things I need to do for it to open. I am posting my code below so that you can understand whats wrong.
import UIKit
import Alamofire
import QuickLook
class AchievementsDetailViewController: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout,QLPreviewControllerDataSource {
let appDelegate = UIApplication.shared.delegate as! AppDelegate
var fileURLs = [URL]()
let quickLookController = QLPreviewController()
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Achievements View"
quickLookController.dataSource = self
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
getAllAchievementsDetails()
}
func extractAndBreakFilenameInComponents(fileURL: NSURL) -> (fileName: String, fileExtension: String) {
let fileURLParts = fileURL.path!.components(separatedBy: "/")
let fileName = fileURLParts.last
let filenameParts = fileName?.components(separatedBy: ".")
return (filenameParts![0], filenameParts![1])
}
func getAllAchievementsDetails() {
fileURLs = []
let detailAchievementsURL = "\(WebAPI.baseURL +
WebAPI.detailAchievementAPI)\(appDelegate.userId)\(WebAPI.achievementId + id)"
Alamofire.request(detailAchievementsURL, method: .get, parameters: nil, encoding: JSONEncoding.default, headers: nil).responseJSON {response in
switch response.result {
case .success:
let resposneString = response.result.value as! String
guard let detailAchievementData = Universal.convertStringToDictionary(text: resposneString) else {return}
switch response.response?.statusCode {
case 200?:
let imagesList = detailAchievementData["lstimages"] as! [[String : Any]]
for imageData in imagesList {
guard let imagePath = imageData["imagesurl"] else {return}
let imageString = "\(WebAPI.mediaBaseURL)\(imagePath)"
let image = imageString.replacingOccurrences(of: "~", with:"")
guard let imageURL = URL(string: image) else {return}
self.fileURLs.append(imageURL)
}
let videosList = detailAchievementData["lstvideos"] as! [[String : Any]]
for videoData in videosList {
guard let videoPath = videoData["videossurl"] else {return}
let videoString = "\(WebAPI.mediaBaseURL)\(videoPath)"
let video = videoString.replacingOccurrences(of: "~", with: "")
guard let videoURL = URL(string: video) else {return}
self.fileURLs.append(videoURL)
}
let docsList = detailAchievementData["lstdocuments"] as! [[String : Any]]
for documentData in docsList {
guard let documentPath = documentData["DocumentPath"] else {return}
let documentString = "\(WebAPI.mediaBaseURL)\(documentPath)"
let document = documentString.replacingOccurrences(of: "~", with: "")
guard let escapedAddress = document.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlQueryAllowed) else {return}
guard let documentURL = URL(string: escapedAddress) else {return}
self.fileURLs.append(documentURL)
}
case 500?:
print(resposneString)
default:
print(resposneString)
}
case .failure(let error):
print(error.localizedDescription)
}
self.achievementsCollectionView.reloadData()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return fileURLs.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "mediaCell", for: indexPath) as! AchievementDetailCell
return cell
}
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return fileURLs.count
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
return fileURLs[index] as QLPreviewItem
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let currentFileParts = extractAndBreakFilenameInComponents(fileURL: fileURLs[indexPath.row] as NSURL)
if currentFileParts.fileExtension == "pdf" || currentFileParts.fileExtension == "ppt" {
if QLPreviewController.canPreview(fileURLs[indexPath.row] as QLPreviewItem) {
quickLookController.currentPreviewItemIndex = indexPath.row
navigationController?.pushViewController(quickLookController, animated: true)
}
}
}
I hope everything is fine from my code...If not, please guide me.. Thanks in advance
来源：https://stackoverflow.com/questions/51870622/how-to-preview-a-ppt-document-coming-from-the-url-in-ios11-swift-4