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當我完成它時，我加載PDF文件時，我按下完成它應該回到以前的視圖控制器，我應該能夠再次打開同一個pdf文件，如果我想。但這不是這裏的情況，當我嘗試打開相同的PDF我得到這個錯誤關閉pdf格式文件後的故事板segue錯誤
fileSystemRepresentationWithPath：]：零或空路徑參數」
如果我改變駁回功能，這 _ =自我。 navigationController？.popToRootViewController（animated：true）
它仍然有效。誰能幫我解決這個問題。這是我的代碼。
類showA3lamDa3waVC：UIViewController中，UIWebViewDelegate，ReaderViewControllerDelegate {
var pdfbooks = UIWebView()
var nIndex:NSInteger!
var post: Post!
var db : DBHelperA3lam = DBHelperA3lam()
var book : a3lamDa3waModel?
@IBAction func backbtn(_ sender: Any) {
if let navController = self.navigationController {
navController.popViewController(animated: true)
}
}
override func viewDidLoad() {
super.viewDidLoad()
var config : SwiftLoader.Config = SwiftLoader.Config()
config.size = 150
config.spinnerColor = .brown
config.foregroundColor = .black
config.foregroundAlpha = 0.5
config.titleTextColor = .brown
SwiftLoader.setConfig(config)
if "" != book?.bookPath {
// self.activityIND.isHidden = true
// self.activityIND.stopAnimating()
SwiftLoader.hide()
UIApplication.shared.isNetworkActivityIndicatorVisible = false
loadReader(filePaht: (book?.bookPath)!)
} else {
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let strName = book?.id
let filePath = "\(documentsPath)/"+strName!+".pdf"
let fileManager = FileManager.default
// self.activityIND.startAnimating()
SwiftLoader.show(title: "Loading...", animated: true)
UIApplication.shared.isNetworkActivityIndicatorVisible = true
if fileManager.fileExists(atPath: filePath) {
// self.loadFromUrl(path: filePath)
loadReader(filePaht: (book?.bookPath)!)
return;
}
let reference = FIRStorage.storage().reference(forURL: (self.book?.bookURL)!)
reference.data(withMaxSize: 50 * 1024 * 1024) { (data, error) -> Void in
if (error != nil) {
print ("unable to download pdf file from Firebase Storage")
// self.activityIND.isHidden = false
// self.activityIND.startAnimating()
SwiftLoader.show(title: "Loading...", animated: true)
UIApplication.shared.isNetworkActivityIndicatorVisible = true
} else {
if ((try! data?.write(to: URL.init(fileURLWithPath: filePath, isDirectory: false))) != nil) {
// self.loadFromUrl(path: filePath)
print ("pdf file is downloaded from Firebase Storage")
self.db.upDate(id: (self.book?.id)!, bookPath: filePath)
// self.activityIND.isHidden = true
SwiftLoader.hide()
self.loadReader(filePaht: filePath)
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
}
}
}
}
func loadReader(filePaht : String) {
let document = ReaderDocument(filePath: filePaht, password: nil)
if document != nil {
let readerVC = ReaderViewController(readerDocument: document)
readerVC?.delegate = self
readerVC?.modalTransitionStyle = UIModalTransitionStyle.crossDissolve
readerVC?.modalPresentationStyle = UIModalPresentationStyle.fullScreen
self.navigationController?.pushViewController(readerVC!, animated: true)
}
}
func dismiss(_ viewController: ReaderViewController!) {
// _ = self.navigationController?.popToRootViewController(animated: true)
if let a3lamDa3waVC = self.navigationController?.viewControllers[1] {
_ = navigationController?.popToViewController(a3lamDa3waVC, animated: true)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
這裏是集合視圖
類a3lamDa3waVC代碼：UIViewController中，UICollectionViewDelegate，UICollectionViewDataSource {
@IBOutlet weak var collectionView: UICollectionView!
var posts = [Post]()
let db : DBHelperA3lam = DBHelperA3lam()
var arrayBooks = [a3lamDa3waModel]()
var selectedIndexPath : IndexPath = IndexPath()
var post: Post!
override func viewDidLoad() {
var config : SwiftLoader.Config = SwiftLoader.Config()
config.size = 150
config.spinnerColor = .brown
config.foregroundColor = .black
config.foregroundAlpha = 0.5
config.titleTextColor = .brown
SwiftLoader.setConfig(config)
super.viewDidLoad()
// activityIndicator.isHidden = false
SwiftLoader.show(title: "Loading...", animated: true)
self.arrayBooks.removeAll()
self.arrayBooks.append(contentsOf: self.db.fetchAll())
self.collectionView.reloadData()
DataService.ds.REF_POSTS.observe(.value, with: { (snapshot) in
if let snapshot = snapshot.children.allObjects as? [FIRDataSnapshot] {
for snap in snapshot {
print ("SNAP: \(snap)")
if let postDict = snap.value as? Dictionary<String, AnyObject>{
let key = snap.key
let post = Post(postKey: key , postData: postDict)
self.posts.append(post)
self.db.insertBook(id: postDict["id"] as! String, imgName: postDict["id"] as! String, imgPath: "", bookName: postDict["book_name"] as! String, bookPath: "", imageURL: postDict["image_path"] as! String, bookURL: postDict["book_path"] as! String, caption: "")
}
}
} else {
}
self.arrayBooks.removeAll()
self.arrayBooks.append(contentsOf: self.db.fetchAll())
self.collectionView.reloadData()
})
collectionView.delegate = self
collectionView.dataSource = self
}
func getFilePath(name : String) -> String {
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let filePath = documentsPath+"/"+name
return filePath
}
@IBAction func backbtn(_ sender: Any) {
if let navController = self.navigationController {
navController.popViewController(animated: true)
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return arrayBooks.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let book = arrayBooks[indexPath.item]
SwiftLoader.hide()
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)as? CollectionViewCellA3lamDa3wa {
cell.initWithBook(book: book)
return cell
}else {
return CollectionViewCellA3lamDa3wa()
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.selectedIndexPath = indexPath
self.performSegue(withIdentifier: "showImage", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "showImage"
{
let vc = segue.destination as! showA3lamDa3waVC
vc.book = self.arrayBooks[self.selectedIndexPath.row]
}
}
}
添加viewDidLoad代碼來查看willappear方法。希望它會工作 – Chandan
我試過這樣做，但它沒有工作 – Khallad
爲什麼你在當前控制器而不是ReaderViewController調用dismiss方法。如果我沒有錯，你可以直接從ReaderViewController中解僱。 – Chandan