ZTUserDefault

Introduction

ZTUserDefaultis a lightweight Swift library that provides a powerful and convenient way to manage UserDefaults with support for reactive programming using Combine. The library simplifies the process of storing, retrieving, and observing changes to UserDefaults, while supporting custom Codable types.

Key Features

• Generic UserDefaults Management: Easily store and retrieve any Codable type in UserDefaults.
• Combine Support: Observe changes in UserDefaults using Combine, enabling reactive programming patterns.
• Custom Codable Support: Automatically encode and decode custom types conforming to ZTCoding.
• Optional Value Handling: Safely handle optional values and remove UserDefaults keys when values are set to nil.

Requirements

• iOS 13.0+
• macOS 10.15+
• Swift 5.2+

Installation

Swift Package Manager

Add ZTUserDefault as a dependency in your Package.swift:

dependencies: [
    .package(url: "https://github.com/willonboy/ZTUserDefault.git", from: "2.0.0")
]

Usage

Basic Example

import ZTUserDefault

class Settings: ObservableObject {
    @UserDefault(key: "username", defaultValue: "Guest")
    var username: String

    @UserDefaultOptional(key: "accessToken")
    var accessToken: String?
}

Custom Codable Types

struct User: ZTCoding {
    let id: Int
    let name: String
}

class Settings: ObservableObject {
    @UserDefault(key: "user", defaultValue: User(id: 0, name: "Guest"))
    var user: User
}

Observing Changes

settings.$username
    .sink { newValue in
        print("Username changed to \(newValue)")
    }
    .store(in: &cancellables)

License

ZTUserDefault is available under the MPL-2.0 license. See the LICENSE file for more information.