swift - NSButton 子类不发送事件

Question

我正在对 NSButton 进行子类化，并且在我认为非常简单的事情上遇到了很多麻烦。从视觉上看，我离我需要去的地方很近，但按下按钮时似乎不再发送事件。此按钮放置在 IB 中并连接到包含 View 的控​​制器类中的操作。

这是自定义 NSButton 和 NSButtonCell 类的代码。您将在 MouseUp 函数中看到我一直试图使它正常工作的几种方法。操作和目标似乎都是空的，即使该信息应该来自 IB，我假设......

震惊的是这个问题还没有被问到和回答 100 次，但即使有，我也找不到。

此外，作为附带问题，我注意到 ButtonCell 概念似乎已被弃用。关于如何在不使用纽扣电池的情况下执行此操作的建议也将不胜感激!

import Cocoa

class TestButton: NSButton {
    static let buttonFont = NSFont(name: "Avenir-Black ", size: 14)!
    static let textColor = NSColor(red:0.84, green:1.00, blue:0.60, alpha:1.00)
    static let buttonColorActive = NSColor(red:0.43, green:0.72, blue:0.00, alpha:1.00)
    static let buttonColorDisabled = NSColor(red:0.72, green:0.86, blue:0.50, alpha:1.00)

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    override init(frame frameRect: NSRect) {
        super.init(frame:frameRect)
    }

    override class func cellClass() -> AnyClass? {
        return TestButtonCell.self
    }

    override func drawRect(dirtyRect: NSRect) {
        super.drawRect(dirtyRect)
    }

    override func awakeFromNib() {
        // Replace Cell
        let oldCell = self.cell
        let cell = TestButtonCell(textCell: oldCell?.title ?? "TestButton" )
        self.cell = cell

        // Add Tracking
        let tracking = NSTrackingArea(rect: self.bounds, options: [NSTrackingAreaOptions.ActiveAlways ,NSTrackingAreaOptions.MouseEnteredAndExited] , owner: self, userInfo: nil)
        self.addTrackingArea(tracking)

        //Set Background Color
        setBGColor(TestButton.buttonColorActive)
        self.sendActionOn(NSEventMask.LeftMouseUp)
    }

    func setBGColor(color:NSColor){
        if let cell = cell as? TestButtonCell {
            cell.setBGColor(color)
        }
    }

    //Mouse Functions
    override func mouseEntered(event: NSEvent) {
        setBGColor(TestButton.buttonColorDisabled)
    }
    override func mouseExited(event: NSEvent) {
        setBGColor(TestButton.buttonColorActive)
    }

    override func mouseDown(theEvent: NSEvent) {
        self.highlighted = true
        super.mouseDown(theEvent)
        self.mouseUp(theEvent)

    }

    override func mouseUp(theEvent: NSEvent) {
        super.mouseUp(theEvent)
//      Swift.print(self.action, self.target)
//      Swift.print(self.cell?.action, self.cell?.target)
//      sendAction(self.action, to:self)
//      self.performClick(self)
    }
}


class TestButtonCell:NSButtonCell {
    func setBGColor(color:NSColor){
        self.backgroundColor = color
    }

    required init(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override init(textCell string: String) {
        super.init(textCell: string)

        self.bordered = false

        let style = NSMutableParagraphStyle()
        style.alignment = .Center
        let attributes = [
            NSForegroundColorAttributeName: TestButton.textColor,
            NSFontAttributeName: TestButton.buttonFont,
            NSParagraphStyleAttributeName: style
            ] as [String : AnyObject]

        let attributedTitle = NSAttributedString(string: title, attributes: attributes)
        self.attributedTitle = attributedTitle
    }
}

Answer 1

想通了。我没有调用 super.awakeFromNib()，而且我还需要在核对它之前保留原始 NSButtonCell 的操作和目标。不过我打算放弃这个细胞 - 似乎完全不需要。