I want to pass the url in documentPicker to previewController. Since all of them are delegates, I can't simply return because that will violate the protocol. How to pass the data from a view to another view? Thanks!
func previewController(controller: QLPreviewController!, previewItemAtIndex index: Int) -> QLPreviewItem! {
//var doc = NSURL(fileURLWithPath: url)
return doc
}
func documentPicker(controller: UIDocumentPickerViewController, didPickDocumentAtURL url: NSURL) {
println("\(url)")
var quickView = QLPreviewController()
quickView.dataSource = self
presentViewController(quickView, animated: true, completion: nil)
}
~~~~~~~~~~~Update~~~~~~~~~6.2~~~~~~~~~~~~~~
Now I follow the idea of the answer as follow
func documentPicker(controller: UIDocumentPickerViewController, didPickDocumentAtURL url: NSURL) {
println("\(url)")
var a: String = "\(url)"
NSUserDefaults.standardUserDefaults().setObject(a, forKey: "URL")
var quickView = QLPreviewController()
quickView.dataSource = self
presentViewController(quickView, animated: true, completion: nil)
}
and
func previewController(controller: QLPreviewController!, previewItemAtIndex index: Int) -> QLPreviewItem!{
var url = NSUserDefaults.standardUserDefaults().objectForKey("URL") as! String
var doc = NSURL(fileURLWithPath: url)
return doc
}
By doing so I avoid the format issue of NSUserDefaults, but the program still break at doc (Thread 1: breakpoint 1.1)
For example, when run it and select a file, the url is
file:///private/var/mobile/Containers/Data/Application/DEE5190D-6E3F-4400-8866-4668B830C588/tmp/DocumentPickerIncoming/Experiment_7.PDF
and the doc is : Optional(file:/private/var/mobile/Containers/Data/Application/DEE5190D-6E3F-4400-8866-4668B830C588/tmp/DocumentPickerIncoming/Experiment_7.PDF -- file:///)
they are the same. Why the app break?
Well you can store your Url in NSUserDefaults. And use it whenever you want. You can store text in NSUserDefaults
func documentPicker(controller: UIDocumentPickerViewController, didPickDocumentAtURL url: NSURL) {
println("\(url)")
NSUserDefaults.standardUserDefaults().setObject(url, forKey: "URL")
var quickView = QLPreviewController()
quickView.dataSource = self
presentViewController(quickView, animated: true, completion: nil)
}
and retrieve it in
func previewController(controller: QLPreviewController!, previewItemAtIndex index: Int) -> QLPreviewItem! {
var doc = NSUserDefaults.standardUserDefaults().objectForKey("URL") as! NSUrl
return doc
}
Related
In my application, I'm using the QuickLook framework to view the document files such as pdf, ppt, doc, etc. etc. But due to privacy concerns, I don't want that the user can share this document with others so please let me know how to disable/hide the share button and also the copy-paste option.
I know this question can be asked by a number of times and tried many solutions but nothing works for me
hide share button from QLPreviewController
UIDocumentInteractionController remove Actions Menu
How to hide share button in QLPreviewController using swift?
Hide right button n QLPreviewController?
Please suggest to me to achieve this.
Here is my demo code:
import UIKit
import QuickLook
class ViewController: UIViewController {
lazy var previewItem = NSURL()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func displayLocalFile(_ sender: UIButton){
let previewController = QLPreviewController()
// Set the preview item to display
self.previewItem = self.getPreviewItem(withName: "samplePDf.pdf")
previewController.dataSource = self
self.present(previewController, animated: true, completion: nil)
}
#IBAction func displayFileFromUrl(_ sender: UIButton){
// Download file
self.downloadfile(completion: {(success, fileLocationURL) in
if success {
// Set the preview item to display======
self.previewItem = fileLocationURL! as NSURL
// Display file
let previewController = QLPreviewController()
previewController.dataSource = self
self.present(previewController, animated: true, completion: nil)
}else{
debugPrint("File can't be downloaded")
}
})
}
func getPreviewItem(withName name: String) -> NSURL{
// Code to diplay file from the app bundle
let file = name.components(separatedBy: ".")
let path = Bundle.main.path(forResource: file.first!, ofType: file.last!)
let url = NSURL(fileURLWithPath: path!)
return url
}
func downloadfile(completion: #escaping (_ success: Bool,_ fileLocation: URL?) -> Void){
let itemUrl = URL(string: "https://images.apple.com/environment/pdf/Apple_Environmental_Responsibility_Report_2017.pdf")
// then lets create your document folder url
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
// lets create your destination file url
let destinationUrl = documentsDirectoryURL.appendingPathComponent("filename.pdf")
// to check if it exists before downloading it
if FileManager.default.fileExists(atPath: destinationUrl.path) {
debugPrint("The file already exists at path")
completion(true, destinationUrl)
// if the file doesn't exist
} else {
// you can use NSURLSession.sharedSession to download the data asynchronously
URLSession.shared.downloadTask(with: itemUrl!, completionHandler: { (location, response, error) -> Void in
guard let tempLocation = location, error == nil else { return }
do {
// after downloading your file you need to move it to your destination url
try FileManager.default.moveItem(at: tempLocation, to: destinationUrl)
print("File moved to documents folder")
completion(true, destinationUrl)
} catch let error as NSError {
print(error.localizedDescription)
completion(false, nil)
}
}).resume()
}
}
}
//MARK:- QLPreviewController Datasource
extension ViewController: QLPreviewControllerDataSource {
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
controller.navigationItem.rightBarButtonItem = nil
return self.previewItem as QLPreviewItem
}
}
Please provide your suggestion to do so or any other framework to view different file formats.
Here is the image
Find below adopted my approach to your code (with modifications to test locally, but the code should be clear). The idea is
a) to override, which is completely allowed by API, needed classes to intercept modification
b) to use intentionally own UINavigationController, as only one navigation controller can be in stack
So here is code:
// Custom navigation item that just blocks adding right items
class MyUINavigationItem: UINavigationItem {
override func setRightBarButtonItems(_ items: [UIBarButtonItem]?, animated: Bool) {
// forbidden to add anything to right
}
}
// custom preview controller that provides own navigation item
class MyQLPreviewController: QLPreviewController {
private let item = MyUINavigationItem(title: "")
override var navigationItem: UINavigationItem {
get { return item }
}
}
class MyViewController : UIViewController, QLPreviewControllerDataSource {
lazy var previewItem = NSURL()
override func loadView() {
let view = UIView()
view.backgroundColor = .white
// just stub testing code
let button = UIButton(type: .roundedRect)
button.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
button.setTitle("Show", for: .normal)
button.addTarget(self, action:
#selector(displayLocalFile(_:)), for: .touchDown)
view.addSubview(button)
self.view = view
}
#objc func displayLocalFile(_ sender: UIButton){
let previewController = MyQLPreviewController() // << custom preview
// now navigation item is fully customizable
previewController.navigationItem.title = "samplePDF.pdf"
previewController.navigationItem.leftBarButtonItem =
UIBarButtonItem(barButtonSystemItem: .done, target: self,
action: #selector(closePreview(_:)))
// wrap it into navigation controller
let navigationController = UINavigationController(rootViewController: previewController)
// Set the preview item to display
self.previewItem = self.getPreviewItem(withName: "samplePDF.pdf")
previewController.dataSource = self
// present navigation controller with preview
self.present(navigationController, animated: true, completion: nil)
}
#objc func closePreview(_ sender: Any?) {
self.dismiss(animated: true) // << dismiss preview
}
func getPreviewItem(withName name: String) -> NSURL{
// Code to diplay file from the app bundle
let file = name.components(separatedBy: ".")
let path = Bundle(for: type(of: self)).path(forResource: file.first!, ofType: file.last!)
let url = NSURL(fileURLWithPath: path!)
return url
}
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
return self.previewItem as QLPreviewItem
}
}
Could anyone tell me how to implement "Open in Safari" in UIActivityViewController? I know this questions is a duplicate of another question posted a long time ago, and the method at that time was by using a framework that can no longer be used.
The data I am sharing is a URL. I already have a fully working ActivityVC and I only need to add that “open in safari” button.
Thank you very much.
code:
#IBAction func shareButtonPressed(_ sender: UIButton) {
let activityVC = UIActivityViewController(activityItems: [URL(string: urlStr)!], applicationActivities: nil)
activityVC.popoverPresentationController?.sourceView = self.view
self.present(activityVC, animated: true, completion: nil)
}
You need to implement your own activity, please check the code below.
import UIKit
final class SafariActivity: UIActivity {
var url: URL?
override var activityImage: UIImage? {
return UIImage(named: "SafariActivity")!
}
override var activityTitle: String? {
return NSLocalizedString("Open in Safari", comment:"")
}
override func canPerform(withActivityItems activityItems: [Any]) -> Bool {
for item in activityItems {
if
let url = item as? URL,
UIApplication.shared.canOpenURL(url)
{
return true
}
}
return false
}
override func prepare(withActivityItems activityItems: [Any]) {
for item in activityItems {
if
let url = item as? URL,
UIApplication.shared.canOpenURL(url)
{
self.url = url
}
}
}
override func perform() {
var completed = false
if let url = self.url {
completed = UIApplication.shared.openURL(url)
}
activityDidFinish(completed)
}
}
let url = URL(string: "http://www.apple.com")!
let activityViewController = UIActivityViewController(activityItems: [url], applicationActivities: [SafariActivity()])
present(activityViewController, animated: true, completion: nil)
Updated to Swift 5.1 & iOS 13
Bonus:
ActivityType extension to use with .excludedActivityTypes.
UIImage(systemName:) to use SF Symbols plus .applyingSymbolConfiguration to take advantage of its flexibility.
To improve:
Implement completion handler on UIApplication.shared.open to handle errors (unlikely to occur).
import UIKit
extension UIActivity.ActivityType {
static let openInSafari = UIActivity.ActivityType(rawValue: "openInSafari")
}
final class SafariActivity: UIActivity {
var url: URL?
var activityCategory: UIActivity.Category = .action
override var activityType: UIActivity.ActivityType {
.openInSafari
}
override var activityTitle: String? {
"Open in Safari"
}
override var activityImage: UIImage? {
UIImage(systemName: "safari")?.applyingSymbolConfiguration(.init(scale: .large))
}
override func canPerform(withActivityItems activityItems: [Any]) -> Bool {
activityItems.contains { $0 is URL ? UIApplication.shared.canOpenURL($0 as! URL) : false }
}
override func prepare(withActivityItems activityItems: [Any]) {
url = activityItems.first { $0 is URL ? UIApplication.shared.canOpenURL($0 as! URL) : false } as? URL
}
override func perform() {
if let url = url {
UIApplication.shared.open(url)
}
self.activityDidFinish(true)
}
}
Try this Link if it meets your requirement
Link - https://bjartes.wordpress.com/2015/02/19/creating-custom-share-actions-in-ios-with-swift/
Code Required
class FavoriteActivity: UIActivity {
override func activityType() -> String? {
return "TestActionss.Favorite"
}
override func activityTitle() -> String? {
return "Add to Favorites"
}
override func canPerformWithActivityItems(activityItems: [AnyObject]) -> Bool {
NSLog("%#", __FUNCTION__)
return true
}
override func prepareWithActivityItems(activityItems: [AnyObject]) {
NSLog("%#", __FUNCTION__)
}
override func activityViewController() -> UIViewController? {
NSLog("%#", __FUNCTION__)
return nil
}
override func performActivity() {
// Todo: handle action:
NSLog("%#", __FUNCTION__)
self.activityDidFinish(true)
}
override func activityImage() -> UIImage? {
return UIImage(named: "favorites_action")
}
}
Usage
#IBAction func showAvc(sender: UIButton) {
let textToShare = "Look at this awesome website!"
let myWebsite = NSURL(string: "http://www.google.com/")!
let objectsToShare = [textToShare, myWebsite]
let applicationActivities = [FavoriteActivity()]
let avc = UIActivityViewController(activityItems: objectsToShare, applicationActivities: applicationActivities)
self.presentViewController(avc, animated: true, completion: nil)
}
This question already has answers here:
How to display remote document using QLPreviewController in swift
(2 answers)
Closed 5 years ago.
Currently I am using QuickLook module to open pdf from network, but it shows a blank page with error "Couldn't issue file extension for url: https://testing-xamidea.s3.amazonaws.com/flowchart/20171103182728150973368.pdf" in console. I guess QuickLook can only open locally saved Pdf files. Is is possible to load pdf from network using quicklook? . This is my code so far- {fileURL contains url from which pdf is to be loaded, also ive set the delegates etc)
extension FlowchartVC:QLPreviewControllerDelegate,QLPreviewControllerDataSource {
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
let url : NSURL! = NSURL(string : fileURL)
return url
}
func previewControllerWillDismiss(_ controller: QLPreviewController) {
self.dismiss(animated: true, completion: nil)
}
}
You need to save the file to disk first and then you can present the pdf. There is no way to present it with QuickLook if the file is in a remote location. The file is saved in the temporary directory. Here is an example view controller showing how it could be done.
Swift 5:
import UIKit
import QuickLook
class ViewController: UIViewController, QLPreviewControllerDataSource {
// Remote url pdf I found on google
let itemURL = URL(string: "https://www.ets.org/Media/Tests/GRE/pdf/gre_research_validity_data.pdf")!
var fileURL: URL?
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let quickLookController = QLPreviewController()
quickLookController.dataSource = self
do {
// Download the pdf and get it as data
// This should probably be done in the background so we don't
// freeze the app. Done inline here for simplicity
let data = try Data(contentsOf: itemURL)
// Give the file a name and append it to the file path
fileURL = FileManager().temporaryDirectory.appendingPathComponent("sample.pdf")
if let fileUrl = fileURL {
// Write the pdf to disk in the temp directory
try data.write(to: fileUrl, options: .atomic)
}
// Make sure the file can be opened and then present the pdf
if QLPreviewController.canPreview(fileUrl as QLPreviewItem) {
quickLookController.currentPreviewItemIndex = 0
present(quickLookController, animated: true, completion: nil)
}
} catch {
// cant find the url resource
}
}
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
return fileURL! as QLPreviewItem
}
}
Swift 3:
import UIKit
import QuickLook
class ViewController: UIViewController, QLPreviewControllerDataSource {
// Remote url pdf I found on google
let itemURL = URL(string: "https://www.ets.org/Media/Tests/GRE/pdf/gre_research_validity_data.pdf")!
var fileURL = URL(string: "")
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let quickLookController = QLPreviewController()
quickLookController.dataSource = self
do {
// Download the pdf and get it as data
// This should probably be done in the background so we don't
// freeze the app. Done inline here for simplicity
let data = Data(contentsOf: itemURL)
// Give the file a name and append it to the file path
fileURL = FileManager().temporaryDirectory.appendingPathComponent("sample.pdf")
// Write the pdf to disk
try data?.write(to: fileURL!, options: .atomic)
// Make sure the file can be opened and then present the pdf
if QLPreviewController.canPreview(fileUrl as QLPreviewItem) {
quickLookController.currentPreviewItemIndex = 0
present(quickLookController, animated: true, completion: nil)
}
} catch {
// cant find the url resource
}
}
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
return fileURL! as QLPreviewItem
}
}
Here is the file showing in the simulator. Using a sample project with just that code.
I have a UITabView in UIViewController, all tab items are linked to other UIViewControllers. I have written a swift code of downloading a file through internet. when I select second tabItem, this code runs well, it downloads and previews the downloaded file, Then when I click on first tabItem and then again click on second tabItem; file downloads well but it doesn't show any preview instead xCode gives me a warning message:
What I want is download file and preview file both should work when I again click on the second tabItem. whatever the code is.
warning: attempt to present QLPreviewController on KPIViewController whose view is not in the window hierarchy
I have found many solutions on the internet but it didn't work
first solution says to use
let viewer = UIDocumentInteractionController(URL: NSURL(fileURLWithPath: path))
UIApplication.sharedApplication().keyWindow?.rootViewController?.presentViewController(viewer, animated: true, completion: nil)
but this function
UIApplication.sharedApplication().keyWindow?.rootViewController?.presentViewController(viewer, animated: true, completion: nil)
do not accept
UIDocumentInteractionController
second solution says to override the existing presentViewController function to
override func presentViewController(viewControllerToPresent: UIViewController, animated flag: Bool, completion: (() -> Void)?) {
let APP_DELEGATE = UIApplication.sharedApplication().delegate
var presentedModalVC:UIViewController = (APP_DELEGATE!.window?!.rootViewController?.presentedViewController)!
if presentedModalVC == true {
while((presentedModalVC.presentedViewController) != nil){
presentedModalVC = presentedModalVC.presentedViewController!
}
presentedModalVC.presentViewController(viewControllerToPresent, animated: flag, completion: nil)
}
else{
APP_DELEGATE?.window!!.rootViewController?.presentViewController(viewControllerToPresent, animated: flag, completion: nil)
}
}
I tried this but it also needs a UIViewController in its parameters where I have UIDocumentInteractionController
I know these function cannot accept UIDocumentInteractionController type viewController.
here is my whole swift code:
// KPIViewController.swift
// download
//
// Created by me on 15/03/2016.
// Copyright © 2016 me. All rights reserved.
//
import UIKit
class KPIViewController: UIViewController,UITabBarDelegate, NSURLSessionDownloadDelegate, UIDocumentInteractionControllerDelegate{
#IBOutlet weak var tabBar1: UITabBar!
#IBOutlet weak var login_Item: UITabBarItem!
#IBOutlet weak var QAreport_Item: UITabBarItem!
#IBOutlet weak var KpiWebView: UIWebView!
#IBOutlet weak var progressView: UIProgressView!
var downloadTask: NSURLSessionDownloadTask!
var backgroundSession: NSURLSession!
var downloadReport:Bool!
var AuditCodeOfDashboardCell:String?
var AuditCodeForPDF:String?
let isDirectory: ObjCBool = false
override func viewDidLoad() {
super.viewDidLoad()
self.progressView.hidden = true
downloadReport = false
// Do any additional setup after loading the view.
self.tabBar1.delegate = self
}
override func viewDidAppear(animated: Bool) {
self.progressView.hidden = true
downloadReport = false
let backgroundSessionConfiguration = NSURLSessionConfiguration.backgroundSessionConfigurationWithIdentifier("backgroundSession")
backgroundSession = NSURLSession(configuration: backgroundSessionConfiguration, delegate: self, delegateQueue: NSOperationQueue.mainQueue())
progressView.setProgress(0.0, animated: false)
var requestURL = NSURL!()
var request = NSURLRequest!()
// loading data from web
if AuditCodeOfDashboardCell != nil{
print(self.AuditCodeOfDashboardCell)
requestURL = NSURL(string:“my URL string&\(AuditCodeOfDashboardCell)”)
request = NSURLRequest(URL: requestURL!)
AuditCodeForPDF = AuditCodeOfDashboardCell
AuditCodeOfDashboardCell = nil
}else{
requestURL = NSURL(string:“my URL string”)
request = NSURLRequest(URL: requestURL!)
}
KpiWebView.loadRequest(request)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tabBar(tabBar: UITabBar, didSelectItem item: UITabBarItem) {
print("selected tabItem: \(item.tag)")
switch (item.tag) {
case 1:
let loginVC = self.storyboard!.instantiateViewControllerWithIdentifier("loginViewController") as! LoginView
presentViewController(loginVC, animated: true, completion: nil)
break
case 2:
if AuditCodeForPDF != nil{
downloadReport = true
let url = NSURL(string: “my URL string&\(AuditCodeForPDF)”)!
urlToDownload = url
}
// if let resultController = storyboard!.instantiateViewControllerWithIdentifier(“2”) as? QAReportViewController {
// presentViewController(resultController, animated: true, completion: nil)
// }
break
default:
break
}
if downloadReport == true{
let url = NSURL(string: “my URL string&\(AuditCodeForPDF)”)!
downloadTask = backgroundSession.downloadTaskWithURL(url)
self.progressView.hidden = false
downloadTask.resume()
downloadReport = false
}
}
// - - Handling download file- - - - - - - - -
func URLSession(session: NSURLSession,
downloadTask: NSURLSessionDownloadTask,
didFinishDownloadingToURL location: NSURL){
let path = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
let documentDirectoryPath:String = path.first!
let fileManager = NSFileManager()
var destinationURLForFile = NSURL(fileURLWithPath: documentDirectoryPath.stringByAppendingString("/Report.pdf"))
if fileManager.fileExistsAtPath(destinationURLForFile.path!){
// showFileWithPath(destinationURLForFile.path!)
do{
try fileManager.removeItemAtPath(destinationURLForFile.path!)
destinationURLForFile = NSURL(fileURLWithPath: documentDirectoryPath.stringByAppendingString("/Report.pdf"))
}catch{
print(error)
}
}
do {
try fileManager.moveItemAtURL(location, toURL: destinationURLForFile)
// show file
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.showFileWithPath(destinationURLForFile.path!)
})
}catch{
print("An error occurred while moving file to destination url")
}
}
func showFileWithPath(path: String){
let isFileFound:Bool? = NSFileManager.defaultManager().fileExistsAtPath(path)
if isFileFound == true{
dispatch_async(dispatch_get_main_queue(), { () -> Void in
let viewer = UIDocumentInteractionController(URL: NSURL(fileURLWithPath: path))
viewer.delegate = self
viewer.presentPreviewAnimated(true)
})
}
}
func URLSession(session: NSURLSession,
downloadTask: NSURLSessionDownloadTask,
didWriteData bytesWritten: Int64,
totalBytesWritten: Int64,
totalBytesExpectedToWrite: Int64){
progressView.setProgress(Float(totalBytesWritten)/Float(totalBytesExpectedToWrite), animated: true)
}
func documentInteractionControllerViewControllerForPreview(controller: UIDocumentInteractionController) -> UIViewController{
return self
}
func documentInteractionControllerDidEndPreview(controller: UIDocumentInteractionController) {
print("document preview ends")
}
}
I cannot find any proper solution that solve my problem. I am new with swift
please anyone on help me. Thanks in advance
UIDocumentInteractionController is not kind of UIViewController. So you cannot present an UIDocumentInteractionController with presentViewController: method.
Checkout https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIDocumentInteractionController_class/
You can presenting a document preview or options menus with UIDocumentInteractionController.
I'm creating a QLPreviewController:
func numberOfPreviewItemsInPreviewController(controller: QLPreviewController) -> Int {
return 1
}
func previewController(controller: QLPreviewController, previewItemAtIndex index: Int) -> QLPreviewItem {
let path = NSBundle.mainBundle().pathForResource("test", ofType: "pdf")
let url = NSURL.fileURLWithPath(path!)
return url
}
#IBAction func previewAction(sender: AnyObject) {
let preview = QLPreviewController()
preview.dataSource = self
self.presentViewController(preview, animated: true, completion: nil)
}
Now I want to add onto the QLPreviewController some kind of Overlay, at last a Label (that should always be seen).
Is there a way todo so?