Sharing data in between apps in IOS

问题

I have a task to share data between apps in the same device. May be both apps can use a shared database on same device. How to share Data between two apps in IOS. Anybody have done it in any way. Please let me know. Thanks

回答1:

You can turn on App group on your App Project capabilities tab on both of your apps with the same group container ID. "group.com.yourCompanyID.sharedDefaults"

Then you can access the same folder from your apps using the following url:

let sharedContainerURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.yourCompanyID.sharedDefaults")!

So if you would like to share a switch state from two different apps you should do it as follow:

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var sharedSwitch: UISwitch!
    let switchURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.yourCompanyID.sharedDefaults")!
        .appendingPathComponent("switchState.plist")
    override func viewDidLoad() {
        super.viewDidLoad()
        print(switchURL.path)
        NotificationCenter.default.addObserver(self, selector: #selector(updateSwitch), name: .UIApplicationDidBecomeActive, object: nil)
    }
    func updateSwitch(_ notofication: Notification) {
        sharedSwitch.isOn = NSKeyedUnarchiver.unarchiveObject(withFile: switchURL.path) as? Bool == true
    }
    @IBAction func switched(_ sender: UISwitch) {
        let success = NSKeyedArchiver.archiveRootObject(sender.isOn, toFile: switchURL.path)
        print(success)
    }
}

来源：https://stackoverflow.com/questions/32652795/sharing-data-in-between-apps-in-ios