Crex 0.1.0

Crex 0.1.0

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由 Marek Rogowski 维护。

Crex 0.1.0

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  • rogowskimark

Crex

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Crex 是一个用于简单和类型安全的 Notification Center 使用的库。通过代码自动完成，发布额外信息非常方便。

示例

要运行示例项目，请克隆仓库，然后首先从 Example 目录运行 pod install

要求

  • iOS 9.3+

  • Swift 4.1

安装

Crx 可通过 CocoaPods 获取。要安装它，只需将以下行添加到您的 Podfile 中

pod 'Crex'

用法

定义事件

import Crex

struct QueueStateChanged: CrexEvent {

    typealias PayloadType = QueueStateChanged.Payload
    static let notificationName = NSNotification.Name(rawValue: "MyApp.QueueStateChanged")
    static let transformation: CrexTransformation = nil

    struct Payload {
        let updatedAt = Date()
        let itemsLeft: Int
    }
}

注册观察者

Crex<QueueStateChanged>.addObserver { (_, queueState) in
    guard let queueState = queueState else {
        return
    }

    print("Queue updated: \(queueState.updatedAt), items left: \(queueState.itemsLeft)")
}

发布事件

Crex<QueueStateChanged>.post(QueueStateChanged.Payload(itemsLeft: 42))

使用系统通知

struct ApplicationDidBecomeActive: CrexEvent {
    typealias PayloadType = Void
    static let notificationName: NSNotification.Name = .UIApplicationDidBecomeActive
    static let transformation: CrexTransformation = nil
}

Crex<ApplicationDidBecomeActive>.addObserver { (_, _) in
    print("Application did become active")
}

使用转换

有时只需从系统发送的通知中获取一些数据即可。此外，在这种方法中，我们在从userInfo字典获取数据时不会创建重复。

struct KeyboardWillShow: CrexEvent {
    typealias PayloadType = KeyboardWillShow.KeyboardPayload
    static let notificationName: NSNotification.Name = .UIKeyboardWillShow

    static let transformation: CrexTransformation = { (userInfo: CrexUserInfo) in
        guard let keyboardSize = userInfo[UIKeyboardFrameBeginUserInfoKey] as? CGRect,
        let animationDuration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? TimeInterval else {
        return nil
        }
        return KeyboardPayload(height: keyboardSize.height, animationDuration: animationDuration)
    }

    struct KeyboardPayload {
        let height: CGFloat
        let animationDuration: TimeInterval
    }
}

Crex<KeyboardWillShow>.addObserver { (_, keyboard) in
    guard let keyboard = keyboard else {
        return
    }

    print("Will show keyboard height: \(keyboard.height), duration: \(keyboard.animationDuration)")
}

作者

Marek Rogowski, [email protected]

许可

Crex可在MIT许可下使用。更多信息请参阅LICENSE文件。