Not able to access ionic plugin keychain key value pair in iOS from share extension code.

Question

I have created an hybrid app where we upload files using ionic.

For iOS we created a share extension to upload the file and right now trying to pass credentials from ionic application to shared extension in iOS.

I used iOS keychain mechanism as it is supported by ionic native and iOS both.

Share extension I have written in swift and key chain implementation here is using a wrapper like ionic plugin in ionic application.

I am able to save information in ionic plugin and fetch in ionic itself. Similar is the case with shared extension.

although I am not able to get the information which is been shared to shared extension from ionic.

this is what i am using in view controller in shared extension.

let keychainWrapper = KeychainWrapper.init(serviceName: "xxxx.xxx.xxx" )
let str = keychainWrapper.accessGroup
        let keyBool = keychainWrapper.accessibilityOfKey("key")
        let value = keychainWrapper.string(forKey: "key", withAccessibility:KeychainItemAccessibility.whenPasscodeSetThisDeviceOnly)
        let serviceName = keychainWrapper.serviceName

in ionic :

 this.keychain.set(key, value,false).then(() => {
      this.keychain.get(key)
        .then(value => console.log('Got value', value))
        .catch(err => console.error('Error getting', err));
    })
    .catch(err => console.error('Error setting', err));

Is there any other way share information like NSUserdefaults etc which is supported by ionic and iOS swift both?

This tutorial is what I have been following.

I cannot keep db on my iOS application in iPhone where the data is shared. — K.S, Aug 24 '18 at 08:40
any specific reason as I am using same sharing DB on both iOS app & extension.? — CodeChanger, Aug 24 '18 at 09:03
I need to pass user email, I could solve this today by using NSUserdefault. I will update my answer with the same. Thanks a lot for looking @CodeChanger — K.S, Aug 24 '18 at 12:08

K.S · Accepted Answer · 2018-09-27T19:20:10.670

In ionic I had to use app preferences plugin. this gave me access to the user defaults although to fetch the group had to change the ionic plugin code so that I could share user defaults saved in ionic and fetch the same thing in app extension.

Plugin https://ionicframework.com/docs/native/app-preferences/

//ionic code
let dict12 = this.appPref.suite('group.xxxxxxx')
        this.appPref.store('group.pmshare', 'keyNa', 'valueNa')
        console.log('dict: ' + dict12)
        this.appPref.fetch('group.pmshare', 'keyNa').then(str => {
        console.log('str: ' + str)
        })


// shared extension code
var defaults = UserDefaults.init(suiteName: "group.xxxxxxx")
        print(defaults?.string(forKey: "keyNa"))
        defaults?.set("fromExtValue", forKey: "fromExt")

Always remember to create a group under target->app groups->ON

Same group will be used to share data between both the applications.

This can be actually used for Inter Application Communication in iOS. When the app is developed using Ionic.

Not able to access ionic plugin keychain key value pair in iOS from share extension code.

1 Answers1