为NSView创建阴影-Cocoa [英] Create Drop Shadow for NSView - Cocoa

问题描述

我正在尝试围绕NSView创建一个投影，就像NSWindow对其阴影进行处理一样，但是我遇到了一些困难.我为NSView创建了一个类，并为其创建了阴影，并且我将此代码用于覆盖方法:

   -(void)drawRect:(NSRect)dirtyRect {
    NSRect rect = NSInsetRect([self bounds], 10.0, 10.0);
    NSShadow *dropShadow = [[[NSShadow alloc] init] autorelease];
    [dropShadow setShadowColor:[NSColor blackColor]];
    [dropShadow setShadowBlurRadius:5];
    [dropShadow setShadowOffset:NSMakeSize(0,-3)];

    [NSGraphicsContext saveGraphicsState];

    [dropShadow set];

    NSRectFill(rect);

    [NSGraphicsContext restoreGraphicsState];

    [super drawRect:dirtyRect];
}

这并没有真正创建我正在寻找的阴影.

这是我要瞄准的阴影...

宁可在NSView中创建一条线，该线看起来像视图边界内的边界.有人对此有任何想法吗?

解决方案

由于NSView限制了边界，我也遇到了类似的阴影问题.

当我使用支持图层的视图时，我对其进行了修复.我只是将超级视图的wantsLayer属性设置为YES.即 [[view superView] setWantsLayer:YES] 并为视图 [view setShadow:dropShadow] 设置阴影./p>

I'm trying to create a drop shadow surrounding the NSView like how NSWindow does it with its shadow, but I'm having some difficulty. I created a class for the NSView I'm creating the drop shadow for and I'm using this code for the overriding method:

   -(void)drawRect:(NSRect)dirtyRect {
    NSRect rect = NSInsetRect([self bounds], 10.0, 10.0);
    NSShadow *dropShadow = [[[NSShadow alloc] init] autorelease];
    [dropShadow setShadowColor:[NSColor blackColor]];
    [dropShadow setShadowBlurRadius:5];
    [dropShadow setShadowOffset:NSMakeSize(0,-3)];

    [NSGraphicsContext saveGraphicsState];

    [dropShadow set];

    NSRectFill(rect);

    [NSGraphicsContext restoreGraphicsState];

    [super drawRect:dirtyRect];
}

This doesn't really create a drop shadow in which I'm looking.

Here is the shadow I'm trying to aim for...

rather creates a line through the NSView that seems like a border within the bounds of the view. Anyone got any ideas for this?

解决方案

I have faced similar shadow issues because NSView clips its bounds.

I fixed it when I used a layer backed view. I simply set the superview's wantsLayer property to YES.. i.e [[view superView] setWantsLayer:YES] and set shadow for view [view setShadow:dropShadow].

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