UserDefaults

class UserDefaults : NSObject

  • Mechanica

    Returns true if key exists.

    Declaration

    Swift

    public final func hasKey(_ key: String) -> Bool

  • Mechanica

    Declaration

    Swift

    public final func optionalBool(forKey defaultName: String) -> Bool?

    Parameters

    defaultName

    A key in the current user’s defaults database.

    Return Value

    The bool value associated with the specified key. If the specified key does not exist, this method returns nil.

  • Mechanica

    Declaration

    Swift

    public final func optionalDouble(forKey defaultName: String) -> Double?

    Parameters

    defaultName

    A key in the current user’s defaults database.

    Return Value

    The double value associated with the specified key. If the specified key does not exist, this method returns nil.

  • Mechanica

    Declaration

    Swift

    public final func optionalFloat(forKey defaultName: String) -> Float?

    Parameters

    defaultName

    A key in the current user’s defaults database.

    Return Value

    The floating-point value associated with the specified key. If the key does not exist, this method returns nil.

  • Mechanica

    Declaration

    Swift

    public final func optionalInteger(forKey defaultName: String) -> Int?

    Parameters

    defaultName

    A key in the current user’s defaults database.

    Return Value

    The integer value associated with the specified key. If the specified key does not exist, this method returns nil.

  • Mechanica

    Removes all keys and values from user defaults.

    Note

    This method only removes keys on the receiver UserDefaults object. System-defined keys will still be present afterwards. resetStandardUserDefaults simply resets the in-memory user defaults object.

    Declaration

    Swift

    public final func removeAll()