更改NSView背景颜色的最佳方法 [英] Best way to change the background color for an NSView

问题描述

我正在寻找更改NSView的backgroundColor的最佳方法.我还希望能够为NSView设置适当的alpha蒙版.像这样:

I'm looking for the best way to change the backgroundColor of an NSView. I'd also like to be able to set the appropriate alpha mask for the NSView. Something like:

myView.backgroundColor = [NSColor colorWithCalibratedRed:0.227f 
                                                   green:0.251f 
                                                    blue:0.337 
                                                   alpha:0.8];

我注意到NSWindow具有此方法，并且我不太喜欢NSColorWheel或NSImage背景选项，但是如果它们是最好的，则愿意使用.

I notice that NSWindow has this method, and I'm not a big fan of the NSColorWheel, or NSImage background options, but if they are the best, willing to use.

推荐答案

是的，您自己的答案是正确的.您还可以使用可可粉方法:

Yeah, your own answer was right. You could also use Cocoa methods:

- (void)drawRect:(NSRect)dirtyRect {
    // set any NSColor for filling, say white:
    [[NSColor whiteColor] setFill];
    NSRectFill(dirtyRect);
    [super drawRect:dirtyRect];
}

在Swift中:

class MyView: NSView {

    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // #1d161d
        NSColor(red: 0x1d/255, green: 0x16/255, blue: 0x1d/255, alpha: 1).setFill()
        dirtyRect.fill()
    }

}

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