How to for loop in userDefaults swift - ios

Question

I am saving data into userDeafults using 2 textfield as String, String but I want to know how to retrieve all the data to display either using loop or function
let save = UserDefaults.standard
let heading = headingText.text
let description = desxriptionTexr.text
save.set(description, forKey: heading!)

Answer 1

To get all keys and corresponding values in UserDefaults, you can use:
for (key, value) in UserDefaults.standard.dictionaryRepresentation() {
print("\(key) = \(value) \n")
}
In swift 3, you can store and retrieve using:
UserDefaults.standard.setValue(token, forKey: "user_auth_token")
print("\(UserDefaults.standard.value(forKey: "user_auth_token")!)")

Answer 2

I think is not a correct way to do.
I suggest you to put your values into a dictionary and set the dictionary into the UserDefaults.
let DictKey = "MyKeyForDictionary"
var userDefaults = UserDefaults.standard
// create your dictionary
let dict: [String : Any] = [
"value1": "Test",
"value2": 2
]
// set the dictionary
userDefaults.set(dict, forKey: DictKey)
// get the dictionary
let dictionary = userDefaults.object(forKey: DictKey) as? [String: Any]
// get value from
let value = dictionary?["value2"]
// iterate on all keys
guard let dictionary = dictionary else {
return
}
for (key, val) in dictionary.enumerated() {
}

Answer 3

If you have multiple Strings, simply save value as array
UserDefaults.standard.set(YourStringArray, forKey: "stringArr")
let arr = UserDefaults.standard.stringArray(forKey: "stringArr")
for s in arr! {
//do stuff
}

Answer 4

Here you are setting the key as heading and the value as description.
You can retrieve the value from userDefaults using UserDefaults.standard.object(forKey:), UserDefaults.standard.string(forKey: ),UserDefaults.standard.value(forKey: ) etc functions.
So its better to save heading and description for 2 different keys may be like
let save = UserDefaults.standard
let heading = headingText.text
let description = desxriptionTexr.text
save.set(description, forKey: "description")
save.set(heading, forKey: "heading")
And you could retrieve like
let description = UserDefaults.standard.string(forKey:"description")
let heading = UserDefaults.standard.string(forKey:"heading")