Transfer data from project to widget in swift - ios

Question

At my project i need to send user id's to widget in iOS. But for do that, my user needs to open application once. Without opening, information stays only 1 day, after that it vanishes and widget stops showing information and await for opening application.
For do that i used appGroup.
What is the correct way to use transfer data from my project to widget?

Answer 1

Swift 5
Follow these steps to pass data from the host app to extensions.
Select project target > Capabilities > add new app group (if you have enabled permissions for your developer account otherwise enable that first)
Select the extension target and repeat the same.
if let userDefaults = UserDefaults(suiteName: "group.com.yourAppgroup") {
createEventDic.removeAll()
let eventDic = NSMutableDictionary()
eventDic.setValue("YourString", forKey: "timeFontName")
createEventDic.append(eventDic)
let resultDic = try? NSKeyedArchiver.archivedData(withRootObject: createEventDic, requiringSecureCoding: false)
userDefaults.set(resultDic, forKey: "setWidget")
userDefaults.synchronize()
} else {
}
Now go to your app extension and do these steps to get the passed data.
if let userDefaults = UserDefaults(suiteName: "group.com.yourAppGroup") {
guard let testcreateEvent = userDefaults.object(forKey: "testcreateEvent") as? NSData else {
print("Data not found in UserDefaults")
return
}
do {
guard let eventsDicArray = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(testcreateEvent as Data) as? [NSMutableDictionary] else {
fatalError("loadWidgetDataArray - Can't get Array")
}
for eventDic in eventsDicArray {
let timeFontName = eventDic.object(forKey: "timeFontName") as? String ?? ""
}
} catch {
fatalError("loadWidgetDataArray - Can't encode data: \(error)")
}
}
Hopefully, it will help. Cheers!

Answer 2

For do that i used appGroup.
What is the correct way to use transfer data from my project to
widget?
What you did so far (App Grouping) is one of the steps that you should follow. Next, as mentioned in App Extension Programming Guide - Sharing Data with Your Containing App:
After you enable app groups, an app extension and its containing app
can both use the NSUserDefaults API to share access to user
preferences. To enable this sharing, use the initWithSuiteName: method
to instantiate a new NSUserDefaults object, passing in the identifier
of the shared group.
So, what you have to do so far is to let the data to be transferred by the UserDefautls. For instance:
if let userDefaults = UserDefaults(suiteName: "group.com.example.myapp") {
userDefaults.set(true, forKey: "myFlag")
}
thus you could pass it to the widget:
if let userDefaults = UserDefaults(suiteName: "group.com.example.myapp") {
let myFlag = userDefaults.bool(forKey: "myFlag")
}
And you follow the same approach for passing the data vise-versa (from the widget to the project).

Answer 3

In Xamarin Forms, we need to use DI to pass the data to the ios project then we can put it into NSUserDefaults
Info: Grouping application is mandatory
Xamarin iOS project - Putting Data into NSUserDefaults
var plist = new NSUserDefaults("group.com.test.poc", NSUserDefaultsType.SuiteName);
plist.SetBool(true, "isEnabled");
plist.Synchronize();
Today Extension - Getting data from NSUserDefaults
var plist = new NSUserDefaults("group.com.test.poc", NSUserDefaultsType.SuiteName);
var result = plist.BoolForKey("isEnabled");
Console.WriteLine($"The result of NSUserdefaults: logesh {result}");