import UIKit
class TermsViewController: PopViewController {
var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
let fileName = "file-sample_100kB"
//https://file-examples.com/index.php/sample-documents-download/sample-rtf-download/
if let rtfPath = Bundle.main.url(forResource: fileName, withExtension: "rtf") {
do {
let attributedStringWithRtf: NSAttributedString = try NSAttributedString(url: rtfPath, options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.rtf], documentAttributes: nil)
self.textView.attributedText = attributedStringWithRtf
} catch let error {
print("Got an error \(error)")
}
}
view.addSubview(textView)
}
}
There's my code to display an RTF file in a textView, but attributedStringWithRtf is nil. The url has the third RTF file that I've tried.
It is also possible to import an attributed string from text in some other standard format, such as HTML or RTF. (There are also corresponding export methods.) To import, get the target text into a Data object and call init(data:options:documentAttributes:) ; alternatively, start with a file and call init(url:options:documentAttributes:). The options: allow you to specify the source text’s format.
And that was related text from Matt Neuburg's book with his posting here: Load Text View with data from RTF file in bundle using Swift 4 and Xcode, but I wasn't able to post anything there, hence the new question.
Related
Problem
I am working on a simple SwiftUI document-based app on macOS (12.0.1) with Xcode 13.2.1.
In my app, I need two TextEditors in the document view. One displays the content of the document, and the other is used to support some other functions.
What is troubling me is that when editing in either of these text editors, the document is set edited, as is in this screenshot. I wonder whether there is a way to prevent the second TextEditor from doing this.
Code
This is the DocumentView to display the document with 2 TextEditors. Only the first one is meant to show the document content.
struct DocumentView: View {
#Binding var document: Document
#State private var string = ""
var body: some View {
TextEditor(text: $document.text)
TextEditor(text: $string)
}
}
The code for the app and the document structure is the same as the Xcode template:
import SwiftUI
#main
struct SwiftUIApp: App {
var body: some Scene {
DocumentGroup(newDocument: CPDocument()) { a in
DocumentView(document: a.$document)
}
}
}
import SwiftUI
import UniformTypeIdentifiers
struct Document: FileDocument {
var text: String
init(text: String = "Document Content") {
self.text = text
}
static var readableContentTypes: [UTType] { [.plainText] }
init(configuration: ReadConfiguration) throws {
guard let data = configuration.file.regularFileContents,
let string = String(data: data, encoding: .utf8)
else {
throw CocoaError(.fileReadCorruptFile)
}
text = string
}
func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper {
let data = text.data(using: .utf8)!
return .init(regularFileWithContents: data)
}
}
What I've tried
I've searched the web but found nothing helpful.
I tried replacing TextEditor with TextField, and that worked for the problem. But a text editing area with only a single line is not what I want.
I tried a hacky solution which is to save the document after editing, but the application crashed with error message Performing #selector(saveDocument:) from sender __SwiftValue 0x600003efac40.
TextEditor(text: $string)
.onChange(of: string) { _ in
NSApp.sendAction(#selector(NSDocument.save(_:)), to: NSApp.keyWindow?.windowController?.document, from: self)
}
I wonder whether it's possible to do that with pure SwiftUI and what would be the best way to solve the problem. Thanks in advance.
What I'm trying to do is store some data from a MacOS App with NSDocument provided class in a file. I decided to use SwiftUI , but all tutorials I found are using Storyboards. And from those I cannot adapt how to get the data from my textfield into my NSDocument class.
As far as I got it I need to init my variables in the NSDocument class like this
class Document: NSDocument {
#objc dynamic var contents = "Foo"
public init(contentString: String) {
self.contents = contentString
}
/* ... */
}
and in the same class I can save this string using
override func data(ofType typeName: String) throws -> Data {
return contents.data(using: .utf8) ?? Data()
throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
}
So in my view generated with SwiftUI I can access this using
struct MainTableView: View {
#State var doc = Document.init()
var body: some View {
TextField("My text", text: self.$doc.contents)
}
}
But - as I'm using only an instance it always saves "Foo" - no matter what I type into my TextField.
Besides - another question that will follow up right away: On the long run I don't want to store a string only. I'll have 3 different 2D-Arrays with different data-structures. Is NSDocument able to handle this by itself or do I need to convert those to JSON/XML/...-String and store this as a file?
I have created an Xcode 11 OS X targeted program to persist with CoreData. I want to verify the contents of written records on the disk. I have read that persistence is implemented by Xcode using SQLite. I have so far been unable to find such a file.
I apologize in advance for not knowing how to use code fences. I've included a line in the code which I had hoped would provide the path to any saved files but after searching the folder I find no ".db" files
override func viewDidLoad() {
super.viewDidLoad()
let appDelegate = NSApplication.shared.delegate as! AppDelegate // Do any additional setup after loading the view.
let context = appDelegate.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Plants", in: context)
let newUser = NSManagedObject(entity: entity!, insertInto: context)
let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
print(paths[0])
newUser.setValue("James B", forKey: "name")
newUser.setValue("Spring", forKey: "fertilizeSeason")
do {
try context.save()
} catch {
print("Failed saving")
}
}
Hoped to find .db file at the returned path.
I know how to add an AccessoryView to an NSOpenPanel (and that works correctly).
Now I would like to make the options that the user selects in the AccessoryView available to the document that is opened.
Any suggestions how that can be doen (if at all?)
I have not found a standard solution, so I created my own:
Introduced a dictionary in the NSDocumentController that associates file URLs with option sets
Override the runModalOpenPanel and wrap the runModalOpenPanel of super with first the setup of the accessory view, and afterwards the evaluation of the options and adding of the options to the dictionary for the associated urls.
When a document is opened, the document can -through the shared NSDocumentController- access the dictionary and retrieve the options.
I am not blown away by this solution, but I also do not see an easier path.
Example code:
struct OptionsAtFileOpen {
let alsoLoadFormat: Bool
}
class DocumentController: NSDocumentController {
var fileOptions: Dictionary<URL, OptionsAtFileOpen> = [:]
var accessoryViewController: OpenPanelAccessoryViewController!
override func runModalOpenPanel(_ openPanel: NSOpenPanel, forTypes types: [String]?) -> Int {
// Load accessory view
let accessoryViewController = OpenPanelAccessoryViewController(nibName: NSNib.Name(rawValue: "OpenPanelAccessoryView"), bundle: nil)
// Add accessory view and make sure it is shown
openPanel.accessoryView = accessoryViewController.view
openPanel.isAccessoryViewDisclosed = true
// Run the dialog
let result = super.runModalOpenPanel(openPanel, forTypes: types)
// If not cancelled, add the files to open to the fileOptions dictionary
if result == 1 {
// Return the state of the checkbox that selects the loading of the formatting file
let alsoLoadFormat = accessoryViewController.alsoLoadFormatFile.state == NSControl.StateValue.on
for url in openPanel.urls {
fileOptions[url] = OptionsAtFileOpen(alsoLoadFormat: alsoLoadFormat)
}
}
return result
}
}
And then in Document
override func read(from data: Data, ofType typeName: String) throws {
...
if let fileUrl = fileURL {
if let dc = (NSDocumentController.shared as? DocumentController) {
if let loadFormat = dc.fileOptions[fileUrl]?.alsoLoadFormat {
...
}
}
}
}
I decided to make my own FB chat app that simply shows https://messenger.com on a WebView after trying other 'freemium' apps.
My ViewController.swift has just a few lines of code that loads URL on the web view
import Cocoa
import WebKit
class ViewController: NSViewController {
#IBOutlet weak var webView: WebView!
override func viewDidLoad() {
super.viewDidLoad()
let url = NSURL(string: "https://messenger.com")
let request = NSURLRequest(URL: url!);
webView.mainFrame.loadRequest(request);
}
override var representedObject: AnyObject? {
didSet {
// do nothing
}
}
}
Besides adding NSAppTransportSecurity key to info.plist to unblock HTTP traffic via HTTPS connection, I have not done any other settings.
Question
Please take a look at this image first.
Everything looks fine & working except two things.
Uploading image does not work - I labeled as 1 in the picture.
normally (as in other released apps or from web browsers) if you click that icon, it shows an explorer to upload a picture like below.
My app completely ignores user's click on that icon so I cannot upload any pictures to the chat. Interestingly, if I drag and drops the picture to the webview, it uploads fine.
Shared picture does not show up - I labeled as 2 in the picture.
again, from other browsers or released apps, it shows the pictures that I shared with participants like below. (of course I censored the pictures)
my app tries to load the pics, but does not display them. I can see it trying to load because I see circular progress indicator while loading.
Why?
I suspect that there might be a way to listen to the JavaScript that's triggered within the WebView and link to a file explorer or something like that?
This I have no idea. I'm logged into Messenger (basically Facebook), so I think session is not a problem here. Maybe some jQuery loading issue??
What should I do to solve these issues?
There is indeed a delegate method to open a new panel called runOpenPanelForFileButtonWithResultListener, documentation here.
In the delegate method, just create a new NSOpenPanel like this:
func webView(sender: WebView!, runOpenPanelForFileButtonWithResultListener resultListener: WebOpenPanelResultListener!, allowMultipleFiles: Bool) {
let openDialog = NSOpenPanel()
if (openDialog.runModal() == NSOKButton) {
let fileName: String = (openDialog.URL?.path)!
resultListener.chooseFilename(fileName) // Use chooseFilenames for multiple files
}
}
I just tried to create a WebView from Messagers App and images are loading well.
You should try to enable WebView options like "Autoload Images" or "Enable Animated Images" from interface builder (or by code).
This code works for me and what is nice here is that you make the download of image asynchronous. You can find more about this concept here: http://www.raywenderlich.com/79149/grand-central-dispatch-tutorial-swift-part-1 and: http://www.raywenderlich.com/79150/grand-central-dispatch-tutorial-swift-part-2
Edited
I. You have to create new Class or a new iOS Swift File named ImageLoader with this content:
class ImageLoader {
var cache = NSCache()
class var sharedLoader : ImageLoader {
struct Static {
static let instance : ImageLoader = ImageLoader()
}
return Static.instance
}
func imageForUrl(urlString: String, completionHandler:(image: UIImage?, url: String) -> ()) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), {()in
var data: NSData? = self.cache.objectForKey(urlString) as? NSData
if let goodData = data {
let image = UIImage(data: goodData)
dispatch_async(dispatch_get_main_queue(), {() in
completionHandler(image: image, url: urlString)
})
return
}
var downloadTask: NSURLSessionDataTask = NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: urlString)!, completionHandler: {(data: NSData!, response: NSURLResponse!, error: NSError!) -> Void in
if (error != nil) {
completionHandler(image: nil, url: urlString)
return
}
if data != nil {
let image = UIImage(data: data)
self.cache.setObject(data, forKey: urlString)
dispatch_async(dispatch_get_main_queue(), {() in
completionHandler(image: image, url: urlString)
})
return
}
})
downloadTask.resume()
})
}
}
II. In your actual viewController you call the method 'imageForUrl' from ImageLoaded following this lines of code:
ImageLoader.sharedLoader.imageForUrl("http://upload.wikimedia.org/wikipedia/en/4/43/Apple_Swift_Logo.png", completionHandler:{(image: UIImage?, url: String) in
self.myImage.image = image!
})
I took the code from this link: https://teamtreehouse.com/community/does-anyone-know-how-to-show-an-image-from-url-with-swift
Edited for image loaded on webview
Here is the code. It works perfect for me:
override func viewDidLoad() {
super.viewDidLoad()
let myWebView:UIWebView = UIWebView(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
myWebView.loadRequest(NSURLRequest(URL: NSURL(string: "https://scontent-vie1-1.xx.fbcdn.net/hphotos-xap1/v/t1.0-9/12144725_10204647881668565_4367944825116750386_n.jpg?oh=5ecdae91f5258ffe0e0355e176f8eb8a&oe=56B007CA")!))
self.view.addSubview(myWebView)
}