将NSColor转换为RGB

问题描述

我正在尝试将NSColor转换为RGB，但似乎给出了完全不正确的结果：

I'm trying to convert an NSColor to RGB, but it seems to give an entirely incorrect result:

NSColor *testColor = [NSColor colorWithCalibratedWhite:0.65 alpha:1.0];

const CGFloat* components = CGColorGetComponents(testColor.CGColor);
NSLog(@"Red: %f", components[0]);
NSLog(@"Green: %f", components[1]);
NSLog(@"Blue: %f", components[2]);
NSLog(@"Alpha: %f", CGColorGetAlpha(testColor.CGColor));

我回来了：红色= 0.65-绿色= 1.0-蓝色= 0.0和alpha是1.0-导致完全不同的颜色。 （应该是灰色，现在是绿色）。

I get back : red = 0.65 - green = 1.0 - blue = 0.0 and alpha is 1.0 - which results in an entirely different color. (It should be gray, now it's green).

我做错了吗？

推荐答案

您需要使用对象，然后您可以使用各种访问器方法

You need to convert the color to an RGB color space using an NSColorSpace object first, then you can get the components using the various NSColor accessor methods

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