如何在不子类化NSButtonCell的情况下创建自定义主题的NSButton? [英] How to create a custom themed NSButton without subclassing NSButtonCell?

问题描述

我目前正在研究自定义主题NSButton.我发现的每个教程或指南都需要将NSButtonCell子类化，甚至 Apple的指南.

I am currently working on a custom themed NSButton. Every tutorial, or guide I have found requires to subclass NSButtonCell, even the guide from Apple.

所有这些似乎都已过时，因为NSControl中的所有单元格方法都是

All of those seem to be outdated, because all cell methods in NSControl are deprecated in Yosemite. I have not found any recommendations or guides what to use as a substitute.

这是我唯一能找到的陈述:

This is the only statement, I could find:

NSCell逐渐弃用

Mac OS X 10.10朝着最终弃用该产品又迈出了一步 细胞.不建议直接访问控件的单元，并且 允许它的方法将在随后的版本中正式弃用 释放.各种单元级别的API已被提升为各种 控制子类以提供对重要对象的无单元访问 功能. NSLevelIndicator，NSTextField，NSSearchField，NSSlider， 和NSPathControl都为此目的具有新的属性.基于细胞 现在不推荐使用NSTableViews，并且应该基于视图的NSTableViews 代替.不推荐使用基于矩阵的NSBrowsers 基于项目的界面.

Gradual deprecation of NSCell

Mac OS X 10.10 takes another step towards the eventual deprecation of cells. Direct access to the cell of a control is discouraged, and methods which allow it will be formally deprecated in a subsequent release. A variety of cell-level APIs have been promoted to various Control subclasses in order to provide cell-free access to important functionality. NSLevelIndicator, NSTextField, NSSearchField, NSSlider, and NSPathControl all have new properties for this purpose. Cell-based NSTableViews are now deprecated, and view-based NSTableViews should be used instead. Matrix-based NSBrowsers are also deprecated in favor of the item-based interface.

摘录自: OS X v10.10的AppKit发行说明

在NSButton上没有单词.

NSTextField支持层支持的视图；因此，我在NSButton上尝试了相同的方法，但是没有效果.

NSTextField supports layer backed views; because of that, I tried the same approach on my NSButton, but that has no effect.

var btn = NSButton(NSMakeRect(0, 0, 50, 20))
btn.wantsLayer = true
btn.bordered = false
btn.layer?.backgroundColor = NSColor(calibratedWhite: 0.99, alpha: 1).CGColor
btn.layer?.borderWidth = 1
btn.layer?.borderColor = NSColor(calibratedWhite: 0.81, alpha: 1).CGColor

推荐答案

我肯定会花更多的时间研究layer-backed view方法.我不确定为什么它对您不起作用，因为没有理由说图层不能在NSButton(实际上是NSView派生类)上工作.

I would definitely spend more time looking into the layer-backed view approach. I'm not sure why it didn't work for you because there's no reason for layers not to work on an NSButton (effectively an NSView derivative).

提到动画时还要考虑更多地查看图层.

Also weighing on looking more into layers is your mentioning of animation.

从我正在处理的项目中提取了一些代码(自定义NSButton):

Some code extracted from a project I am working on (custom NSButton):

来自init()...

From init()...

    self.wantsLayer = true
    self.layerContentsRedrawPolicy = NSViewLayerContentsRedrawPolicy.OnSetNeedsDisplay

    self.layer?.borderColor = NSColor.gridColor().CGColor
    self.layer?.borderWidth = 0.5
    self.layer?.backgroundColor = NSColor.whiteColor().CGColor

然后，您可以使用以下命令在特定于图层的显示周期中进行精细控制:

You can then get fine-grained control in the display cycle specific to layers with:

override var wantsUpdateLayer:Bool{
    return true
}

override func updateLayer() {
    // your code here
    super.updateLayer()
}

如果您的自定义按钮需要某种形状，那么您甚至可以在下面使用CAShapeLayer来使您的背衬层成为特殊形状...更多细节需要研究.

If your custom button needs a shape then you can even use a CAShapeLayer below to make your backing layer a special shape...more detail to be looked into.

override func makeBackingLayer() -> CALayer {
    return CAShapeLayer()
}

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