Interactive Ink

Answered

Save and load handwritten notes

Hello again, 

I am new into iOS Swift developing, so I do have many questions, sorry. What I want to have is saving only handwritten inputs at the same spots and load them at the same location, not need converted ones. So if I understood correctly, I should follow this page https://developer.myscript.com/docs/interactive-ink/1.3/ios/fundamentals/storage/. Or should I take the "import and export" section ?

If you have answered my question, can I provide some codes to check later ? Since I am new into coding, I have some problems with translating from Objective-C into Swift. 

Thanks in advance! 


Best Answer

I could solve my problem. The path I entered was not found. What helped was:   

let urlwithExtension = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("New", isDirectory: false).appendingPathExtension("iink")
        
let fullpath = urlwithExtension.absoluteString.replacingOccurrences(of: "file://", with: "")

if FileManager.default.fileExists(atPath: fullpath) {
....
}
    

  


Dear Thanh Hoang,

thank you for your question.

Indeed you are right, you shall not use the import/export functions but work with packages (create/save/load) following the link you pointed.

can I provide some codes to check later ?
>>This is out of our scope, we recommend you refer to tutorials for beginners

I have some problems with translating from Objective-C into Swift.
>>We provide our getStarted for the Swift language: https://developer.myscript.com/docs/interactive-ink/1.3/ios/fundamentals/get-started/#playing-with-the-get-started-example

Best regards,

Olivier

Thanks Oliver for your response. Do you have a sample of code regarding saving and loading inputs ? I tried to follow your tutorial but get the error "138 a package associated with the filename already exists" 

What have I already tried ?  Here is a part of my code regarding saving and loading    

    var part: IINKContentPart!
    var package: IINKContentPackage!
    var history = [String]()
    let packageName = "test.iink"
 
    override viewdidload() {
...
openContent()
...
}

   func loadHistory() {
        do  {
            if let history =  try part.metadata?.stringArray(forKey: packageName){
                self.history = history
            }
        } catch {
            print("Error")
        }
    }

   func saveHistory() {
        var parameterSet: IINKParameterSet
        parameterSet = part.metadata!
        do {
            try parameterSet.setStringArray(self.history, forKey: packageName)
            part.metadata = parameterSet
        } catch {
            print("Error")
        }
    }

  func saveContent() {
        saveHistory()
        do {
            try package.save()
        } catch {
            print("error")
        }
    }

 func openContent() {
        
        if FileManager.default.fileExists(atPath: packageName) {
            do {
                if let engine = (UIApplication.shared.delegate as? AppDelegate)?.engine {
                    package = try engine.openPackage(packageName)
                    part = try package.getPartAt(0)
                    loadHistory()
                }
            } catch {
                print("Error")
            }
            
        } else {
            do {
                package = try createPackage(packageName: "test")
                part = try package.getPartAt(0)
                editorViewController.editor.part = part
                history = []
            } catch {
                print("Error while creating package : " + error.localizedDescription)
            }
        }
    } 

   

Dear Thanh,


currently, when are you getting this error? When opening the package ? Saving it?


When closing your part, are you proceeding as in our code:


- (void)unloadPart
{
self.currentPackage = nil;
self.editorViewController.editor.part = nil;
self.title = @"";
}


Best regards,


Olivier

Answer

I could solve my problem. The path I entered was not found. What helped was:   

let urlwithExtension = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("New", isDirectory: false).appendingPathExtension("iink")
        
let fullpath = urlwithExtension.absoluteString.replacingOccurrences(of: "file://", with: "")

if FileManager.default.fileExists(atPath: fullpath) {
....
}
    

  

Dear Thanh,


thank you for the update, I am glad isse is solved.


Best regards,


Olivier