Userdefaults set in Swift files return nil when accessed from objective c file under same target

Question

Userdefaults value set in swift module returns nil when accessed from Objecive-c files under the same target.

defaults?.setValue(data["details"]["equipmentLocationRefreshInterval"].intValue, forKey: "equipmentLocationRefreshInterval")
 defaults?.setValue(data["details"]["hasEquipmentDeviceLocationConfigured"].boolValue, forKey: "hasEquipmentDeviceLocationConfigured")
defaults?.synchronize()
//data["details"]["equipmentLocationRefreshInterval"] = 30
//data["details"]["hasEquipmentDeviceLocationConfigured"] = TRUE

When accessed from objective-C classes

[[NSUserDefaults standardUserDefaults] valueForKey:@"equipmentLocationRefreshInterval"];
//returns nil
[[NSUserDefaults standardUserDefaults] integerForKey:@"equipmentLocationRefreshInterval"];
//returns <nil>
[[NSUserDefaults standardUserDefaults] boolForKey:@"hasEquipmentDeviceLocationConfigured"];
// returns true when set as true in swift module.

I am failing to understand this behavior of Userdefaults. I am able to access one key's value and not others.

Check this : https://stackoverflow.com/a/44171550/14733292 – Raja Kishan Jan 08 '21 at 06:54 — Raja Kishan, Jan 08 '21 at 06:54

score 0 · Answer 1 · answered Jan 08 '21 at 14:05

Swifts UserDefaults.setValue looks:

open func setValue(_ value: Any?, forKey key: String)

So it can get optional of any type and you should check that you pass not nil value.

First check that your optional defaults is not nil and then verify data["details"]["equipmentLocationRefreshInterval"].intValue because there are three optionals one by one: two of them to get a value from your dictionary and last to convert your stored type (is it NSString?) to Int with intValue and each of these optionals can be nil.

Userdefaults set in Swift files return nil when accessed from objective c file under same target

1 Answers1