NSCollectionViewItem按钮动作无效果

Question

点击按钮无效我希望有个好心人能帮我弄明白原因下面是我的代码

class cell_word_list_1: NSCollectionViewItem {
static let item = NSUserInterfaceItemIdentifier(rawValue: "cell_list_id_1")
override func viewDidLoad() {
super.viewDidLoad()
}
override func loadView() {
let rootView = NSView()
rootView.wantsLayer = true
rootView.layer?.backgroundColor = #colorLiteral(red: 0.5725490451, green: 0, blue: 0.2313725501, alpha: 1)

let button = NSButton()
button.frame = NSRect(x: 0, y: 0, width: 100, height: 100)
button.action = #selector(click)

rootView.addSubview(button)
self.view = rootView
}
@objc func click()  {
print("------> button click")
}

}

Answer 1

如果没有目标，操作将被发送到第一个响应器并沿着响应器链向上发送。这不起作用，因为项目不在响应器链中。解决方法:设置按钮的目标:

button.target = self