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 掩码.类似的东西:

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 有这个方法，而且我不是 NSColorWheel 或 NSImage 背景选项的忠实粉丝，但是如果他们是最好的，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，你自己的回答是对的.你也可以使用 Cocoa 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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