如何显示NSView的阴影? [英] How to display shadow for NSView?

问题描述

我在这里和其他博客中经历了很多话题，但无法解决此问题.我在窗口的内容视图中添加了一个子视图.这是情节提要-

I have gone through many threads here and other blogs but not able to solve this issue. I have a added a subview in content view of window. Here is the storyboard--

-

我已将customView的出口拖到视图控制器中，这是视图控制器的代码-

I have dragged out outlet of customView to view controller and here is the code for view controller -

import Cocoa
import QuartzCore

class ViewController: NSViewController {

    @IBOutlet weak var customView: NSView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        self.view.wantsLayer = true
        self.customView.wantsLayer = true
        self.customView.layer?.backgroundColor = NSColor.redColor().CGColor
        self.customView.layer?.cornerRadius = 5.0
        self.customView.layer?.shadowOpacity = 1.0
        self.customView.layer?.shadowColor = NSColor.blackColor().CGColor
        self.customView.layer?.shadowOffset = NSMakeSize(0, -3)
        self.customView.layer?.shadowRadius = 20
    }

    override var representedObject: AnyObject? {
        didSet {
        // Update the view, if already loaded.
        }
    }
}

我在项目中添加了QuartzCore框架-

I have added QuartzCore frame work in my project -

但是没有出现阴影，这是屏幕截图- .

But the shadow is not appearing, here is the screen shot - .

我无法解决看似微不足道的问题.我想念什么?谢谢您的帮助.

I am not able to solve what appears to be trivial. What am I missing? thanks for your help.

推荐答案

如果我添加以下行，则可以解决问题-

If I add the following line it solves the problem-

self.customView.shadow = NSShadow()

最终代码是-

import Cocoa
import QuartzCore

class ViewController: NSViewController {

    @IBOutlet weak var customView: NSView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        self.view.wantsLayer = true
        self.view.superview?.wantsLayer = true
        self.customView.wantsLayer = true
        self.customView.shadow = NSShadow()
        self.customView.layer?.backgroundColor = NSColor.redColor().CGColor
        self.customView.layer?.cornerRadius = 5.0
        self.customView.layer?.shadowOpacity = 1.0
        self.customView.layer?.shadowColor = NSColor.greenColor().CGColor
        self.customView.layer?.shadowOffset = NSMakeSize(0, 0)
        self.customView.layer?.shadowRadius = 20
    }

    override var representedObject: AnyObject? {
        didSet {
        // Update the view, if already loaded.
        }
    }


}

我无法确定问题，可能有人在这里指出.

I am not able to identify the issue may be someone here will point it out.

这篇关于如何显示NSView的阴影?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！