nextTapped 函数不会移动到下一个 pdf 页面
the function nextTapped does not move to next pdf page
函数 nextTapped 和函数 previousTapped 显示此错误“使用未解析的标识符 'pdfView';你是说 'PDFView' 吗?”我想从函数 nextTapped 移动到下一个 pdf 页面和函数 previousTapped 移动到上一个当我显示 pdf 时的 pdf 页面我想从 nextButton 移动到下一个 pdf 页面和 previousButton 移动到上一个 pdf 页面
import UIKit
import AVFoundation
import MobileCoreServices
import PDFKit
class RecorderViewController: UIViewController {
@IBOutlet var nextButton:UIButton!
@IBOutlet var previousButton:UIButton!
override func viewDidLoad() {
super.viewDidLoad()
nextButton.isHidden = true
previousButton.isHidden = true
}
@IBAction func `import`(_ sender: Any) {
let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypePDF as String], in: .import)
documentPicker.delegate = self as? UIDocumentPickerDelegate
documentPicker.allowsMultipleSelection = true
present(documentPicker, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func nextTapped(_ sender: Any) {
pdfView.goToNextPage(sender)}
@IBAction func previousTapped(_ sender: Any) {
pdfView.goToPreviousPage(sender)
}
extension RecorderViewController: UIDocumentPickerDelegate {
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
guard let selectedFileURL = urls.first else {
return
}
/////////her to display PDF File
let pdfView = PDFView()
pdfView.frame = CGRect(x: 0, y: 160, width: 1024, height: 1139)
pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.view.addSubview(pdfView)
pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
let thumbnailView = PDFThumbnailView()
thumbnailView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(thumbnailView)
thumbnailView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
thumbnailView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
thumbnailView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
pdfView.bottomAnchor.constraint(equalTo: thumbnailView.topAnchor).isActive = true
pdfView.heightAnchor.constraint(equalToConstant: 150)
pdfView.displayMode = .singlePage
// Fit content in PDFView.
nextButton.isHidden = false
previousButton.isHidden = false
pdfView.autoScales = true
pdfView.document = PDFDocument(url: selectedFileURL)
let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let sandboxFileURL = dir.appendingPathComponent(selectedFileURL.lastPathComponent)
///i need to ensure the file is saved
if FileManager.default.fileExists(atPath: sandboxFileURL.path) {
print("Already exists! Do nothing")
}
else {
do {
try FileManager.default.copyItem(at: selectedFileURL, to: sandboxFileURL)
print("Copied file!")
}
catch {
print("Error: \(error)")
}
}
}
}
在 Class 中定义您的 pdfView,它自己不在如下扩展中:
//Add PDF View Object here not in extension
let pdfView = PDFView()
只需像这样稍微更新您的代码:
import UIKit
import AVFoundation
import MobileCoreServices
import PDFKit
class RecorderViewController: UIViewController {
//Add PDF View Object here not in extension
let pdfView = PDFView()
@IBOutlet var nextButton:UIButton!
@IBOutlet var previousButton:UIButton!
override func viewDidLoad() {
super.viewDidLoad()
nextButton.isHidden = true
previousButton.isHidden = true
}
@IBAction func `import`(_ sender: Any) {
let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypePDF as String], in: .import)
documentPicker.delegate = self as? UIDocumentPickerDelegate
documentPicker.allowsMultipleSelection = true
present(documentPicker, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func nextTapped(_ sender: Any) {
pdfView.goToNextPage(sender)
}
@IBAction func previousTapped(_ sender: Any) {
pdfView.goToPreviousPage(sender)
}
}
extension RecorderViewController: UIDocumentPickerDelegate {
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
guard let selectedFileURL = urls.first else {
return
}
/////////her to display PDF File
pdfView.frame = CGRect(x: 0, y: 160, width: self.view.frame.size.width, height: self.view.frame.size.height - 160)
pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.view.addSubview(pdfView)
pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
let thumbnailView = PDFThumbnailView()
thumbnailView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(thumbnailView)
thumbnailView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
thumbnailView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
thumbnailView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
pdfView.bottomAnchor.constraint(equalTo: thumbnailView.topAnchor).isActive = true
pdfView.heightAnchor.constraint(equalToConstant: 150)
pdfView.displayMode = .singlePage
// Fit content in PDFView.
nextButton.isHidden = false
previousButton.isHidden = false
pdfView.autoScales = true
pdfView.document = PDFDocument(url: selectedFileURL)
let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let sandboxFileURL = dir.appendingPathComponent(selectedFileURL.lastPathComponent)
///i need to ensure the file is saved
if FileManager.default.fileExists(atPath: sandboxFileURL.path) {
print("Already exists! Do nothing")
}
else {
do {
try FileManager.default.copyItem(at: selectedFileURL, to: sandboxFileURL)
print("Copied file!")
}
catch {
print("Error: \(error)")
}
}
}
希望这能解决您的问题。
函数 nextTapped 和函数 previousTapped 显示此错误“使用未解析的标识符 'pdfView';你是说 'PDFView' 吗?”我想从函数 nextTapped 移动到下一个 pdf 页面和函数 previousTapped 移动到上一个当我显示 pdf 时的 pdf 页面我想从 nextButton 移动到下一个 pdf 页面和 previousButton 移动到上一个 pdf 页面
import UIKit
import AVFoundation
import MobileCoreServices
import PDFKit
class RecorderViewController: UIViewController {
@IBOutlet var nextButton:UIButton!
@IBOutlet var previousButton:UIButton!
override func viewDidLoad() {
super.viewDidLoad()
nextButton.isHidden = true
previousButton.isHidden = true
}
@IBAction func `import`(_ sender: Any) {
let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypePDF as String], in: .import)
documentPicker.delegate = self as? UIDocumentPickerDelegate
documentPicker.allowsMultipleSelection = true
present(documentPicker, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func nextTapped(_ sender: Any) {
pdfView.goToNextPage(sender)}
@IBAction func previousTapped(_ sender: Any) {
pdfView.goToPreviousPage(sender)
}
extension RecorderViewController: UIDocumentPickerDelegate {
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
guard let selectedFileURL = urls.first else {
return
}
/////////her to display PDF File
let pdfView = PDFView()
pdfView.frame = CGRect(x: 0, y: 160, width: 1024, height: 1139)
pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.view.addSubview(pdfView)
pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
let thumbnailView = PDFThumbnailView()
thumbnailView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(thumbnailView)
thumbnailView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
thumbnailView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
thumbnailView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
pdfView.bottomAnchor.constraint(equalTo: thumbnailView.topAnchor).isActive = true
pdfView.heightAnchor.constraint(equalToConstant: 150)
pdfView.displayMode = .singlePage
// Fit content in PDFView.
nextButton.isHidden = false
previousButton.isHidden = false
pdfView.autoScales = true
pdfView.document = PDFDocument(url: selectedFileURL)
let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let sandboxFileURL = dir.appendingPathComponent(selectedFileURL.lastPathComponent)
///i need to ensure the file is saved
if FileManager.default.fileExists(atPath: sandboxFileURL.path) {
print("Already exists! Do nothing")
}
else {
do {
try FileManager.default.copyItem(at: selectedFileURL, to: sandboxFileURL)
print("Copied file!")
}
catch {
print("Error: \(error)")
}
}
}
}
在 Class 中定义您的 pdfView,它自己不在如下扩展中:
//Add PDF View Object here not in extension
let pdfView = PDFView()
只需像这样稍微更新您的代码:
import UIKit
import AVFoundation
import MobileCoreServices
import PDFKit
class RecorderViewController: UIViewController {
//Add PDF View Object here not in extension
let pdfView = PDFView()
@IBOutlet var nextButton:UIButton!
@IBOutlet var previousButton:UIButton!
override func viewDidLoad() {
super.viewDidLoad()
nextButton.isHidden = true
previousButton.isHidden = true
}
@IBAction func `import`(_ sender: Any) {
let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypePDF as String], in: .import)
documentPicker.delegate = self as? UIDocumentPickerDelegate
documentPicker.allowsMultipleSelection = true
present(documentPicker, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func nextTapped(_ sender: Any) {
pdfView.goToNextPage(sender)
}
@IBAction func previousTapped(_ sender: Any) {
pdfView.goToPreviousPage(sender)
}
}
extension RecorderViewController: UIDocumentPickerDelegate {
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
guard let selectedFileURL = urls.first else {
return
}
/////////her to display PDF File
pdfView.frame = CGRect(x: 0, y: 160, width: self.view.frame.size.width, height: self.view.frame.size.height - 160)
pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.view.addSubview(pdfView)
pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
let thumbnailView = PDFThumbnailView()
thumbnailView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(thumbnailView)
thumbnailView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
thumbnailView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
thumbnailView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
pdfView.bottomAnchor.constraint(equalTo: thumbnailView.topAnchor).isActive = true
pdfView.heightAnchor.constraint(equalToConstant: 150)
pdfView.displayMode = .singlePage
// Fit content in PDFView.
nextButton.isHidden = false
previousButton.isHidden = false
pdfView.autoScales = true
pdfView.document = PDFDocument(url: selectedFileURL)
let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let sandboxFileURL = dir.appendingPathComponent(selectedFileURL.lastPathComponent)
///i need to ensure the file is saved
if FileManager.default.fileExists(atPath: sandboxFileURL.path) {
print("Already exists! Do nothing")
}
else {
do {
try FileManager.default.copyItem(at: selectedFileURL, to: sandboxFileURL)
print("Copied file!")
}
catch {
print("Error: \(error)")
}
}
}
希望这能解决您的问题。