How to add shadow to NSView

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I've spent some time trying to figure out how to add a shadow to an NSView. For now, I am attempting to use the NSShadow class to accomplish this. My code is below. I am attempting to create the shadow in a custom init method in a NSView subclass. No matter what I try, no shadow appears.

NSShadow *dropShadow = [[NSShadow alloc] init];
[dropShadow setShadowColor:[NSColor blackColor]];

[self setWantsLayer:YES];
[self setShadow:dropShadow];

Edit

Here is how I tried to do it with CALayer.

self.layer.shadowOffset = CGSizeMake(10, 10);
self.layer.shadowOpacity = 1.0;
self.layer.shadowRadius = 10.0;
self.layer.shadowPath = [self quartzPathFromBezierPath:[NSBezierPath bezierPathWithRect:frame]];

quartzPathFromBezierPath: converts an NSBezierPath to a CGPath.

use this with offset and other params need to be set

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
    NSShadow *dropShadow = [[NSShadow alloc] init];
    [dropShadow setShadowColor:[NSColor redColor]];
    [dropShadow setShadowOffset:NSMakeSize(0, -10.0)];
    [dropShadow setShadowBlurRadius:10.0];

    [self setWantsLayer: YES];
    [self setShadow: dropShadow];

    [dropShadow release];
}

return self;
}

shadow. The shadow displayed underneath the view. SDK. macOS 10.5+. Framework. AppKit An array of Core Image filters to apply to the view's background. When you configure any of the shadow-related properties on the view’s layer, such as the shadow Color, shadow Offset, shadow Opacity or shadow Radius properties, this property contains the NSShadow object that encapsulates that information. Assigning a new shadow object to this property sets the corresponding shadow-related properties on the view’s layer.

An alternative to NSShadow is to get the views layer and use its shadow related properties. In particular, be sure to set the shadowOpacity to something above 0 (the default).

Note that you can't use the shadow offset and the shadow path at the same time.

On iOS,If we want to display a shadow View,So basically do: self.view.layer?.​shadowColor = NSColor.black.cgColor self.view.layer? So I created a class extending NSCustomView and tried to add it in the main Window but I just cannot understand how to do it. So far I added a Custom View to the main View then tried to add it programmatically like: TestView *view = [[TestView alloc] init]; [[_window contentView] addSubview:view]; but this is not working. So how can I do this?

Try following this answer, Here

I think the most important line is the self.view.superview?.wantsLayer = true

Shadows The NSShadow class adds shadows to shapes or text. Using a shadow is very similar to using a color—you create one and call-set to apply it to the current graphics context. The shadow will be applied StyledImageView : NSView  Add or remove a shadow. To add a shadow, click the shadow style you want. To remove a shadow, click No Shadow. Change the direction of the shadow. To change the direction of a shadow, click a shadow that goes the direction you want. Change the distance of the shadow from the object. Click Shadow Settings, then click any of the four Nudge Shadow

Add a little depth to your user interface using shadows. have access to a layer property where we can apply shadow effects directly in code. Most of the functionality of the NSView class is automatically invoked by AppKit. Unless you’re implementing a concrete subclass of NSView or working intimately with the content of the view hierarchy at runtime, you don’t need to know much about this class’s interface. For any view, there are many methods that you can use as-is.

I'm trying to create a drop shadow surrounding the NSView like how NSWindow does it If I add to my view layer - all appears to be ok, but I can't add a layer. With CSS you can add shadow to text and to elements. The CSS text-shadow property applies shadow to text. In its simplest use, you only specify the horizontal shadow (2px) and the vertical shadow (2px): To add more than one shadow to the text, you can add a comma-separated list of shadows. The following example shows a white text with black

We'll do it by adding a drop shadow to the path that we're drawing. Sounds difficult, right? Thanks to CoreGraphics and ShadowView, a NSView subclass by​  Before we get started on implementing the shadows, let's get the interface tweaks out of the way. Drop shadows have four input parameters that define their appearance. We'll add a slider with a text field for each one. In addition, we will add a check box control to draw the bezier path as a filled shape. Lay out the controls as shown in Figure 2.

Comments
  • Have you tried View Effects Inspector in Interface Builder?
  • Check what quartzPathFromBezierPath returns, why don't you just ask the bezier for its path?
  • I don't think you can ask an NSBezierPath directly for a CGPath (even though you can for UIBezierPath). I found the source code for quartzPathFromBezierPath: on Apple's site. How would you do this though?
  • Ok, I misread the class name. Are you setting the view or layer to clip to bounds?