通过带参数的#selector 调用函数

Question

我想调用一个函数并使用 #selector 为其提供参数。但是，我收到错误消息：

"Argument of '#selector' does not refer to an '@objc' method, property, or initializer"

@objc func changeCrypto(crypto: String) {
    //stuff
}

func constructMenu() {
    let menu = NSMenu()

    menu.addItem(NSMenuItem(title: "Bitcoin", action: #selector(changeCrypto(crypto: "bitcoin")), keyEquivalent: "B"))
    menu.addItem(NSMenuItem(title: "Ethereum", action: #selector(changeCrypto(crypto: "ethereum")), keyEquivalent: "E"))
    menu.addItem(NSMenuItem(title: "Litecoin", action: #selector(changeCrypto(crypto: "litecoin")), keyEquivalent: "L"))
    menu.addItem(NSMenuItem.separator())
    menu.addItem(NSMenuItem(title: "Quit It", action: #selector(NSApplication.terminate(_:)), keyEquivalent: "q"))

    statusItem.menu = menu
}

Answer 1

我修好了！我把它改成了下面的..

@objc func changeCrypto(_ sender: NSMenuItem) {
//Here I call the title of the Menu Item pressed
print(sender.title)
}

func constructMenu() {
let menu = NSMenu()

menu.addItem(NSMenuItem(title: "Bitcoin", action: #selector(changeCrypto(_:)), keyEquivalent: "B"))
menu.addItem(NSMenuItem(title: "Ethereum", action: #selector(changeCrypto(_:)), keyEquivalent: "E"))
menu.addItem(NSMenuItem(title: "Litecoin", action: #selector(changeCrypto(_:)), keyEquivalent: "L"))
menu.addItem(NSMenuItem.separator())
menu.addItem(NSMenuItem(title: "Quit It", action: #selector(NSApplication.terminate(_:)), keyEquivalent: "q"))

statusItem.menu = menu
}

通过带参数的#selector 调用函数

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