ios - 如何使用从 Swift 到 Objective-C 的 Notification.Name 扩展？

Question

我为 Notification.Name 创建了一个扩展，如下所示:

public extension Notification.Name {
    public static let blahblahblah = Notification.Name(rawValue: "blahblahblah")
}

现在我想在 Objective-C 中使用这个扩展，但即使它是公开的也无法访问。

如何在 Objective-C 和 Swift 中访问和使用这个 Swift 扩展？

以前我在 Objective-C 中使用常量值，但现在我正在升级我的代码并想使用这个扩展。

Answer 1

我在 swift 文件中的扩展

extension Notification.Name {
    static let purchaseDidFinish = Notification.Name("purchaseDidFinish")
}

@objc extension NSNotification {
    public static let purchaseDidFinish = Notification.Name.purchaseDidFinish
}

---

// OBJECTIVE-C

#import YourProjectName-Swift.h

[NSNotificationCenter.defaultCenter addObserver:self selector:@selector(purchaseDidFinish) name:NSNotification.purchaseDidFinish object:nil];

---

// SWIFT
NotificationCenter.default.addObserver(self, selector: #selector(purchaseDidFinish), name: .purchaseDidFinish, object: nil)

---

@objc func purchaseDidFinish(notification: Notification) {
    print("purchaseDidFinish")
}

@leanne 的回答非常有帮助