在鼠标下检测颜色（Mac） [英] Detect color under mouse (Mac)

问题描述

我一直在网上搜索了几个小时，没有找到任何东西。

i've been searching the web for more than hours and didn't find anything.

我想知道如何获得像素的颜色鼠标指针目前是。
我编程了一个控制台应用程序，所以我没有重叠的窗口或其他东西。

I want to know how to get the color of the pixel where the mouse pointer currently is. I programmed a console application, so I have no window to overlay or something else.

更多细节：
当我构建和运行程序（cmd + r），它应该给我一个控制台日志的颜色，我的鼠标指针目前是。这是可能吗？

Just more detail: When I build&run the program ( cmd+r ), it should give me a console log of the color where my mouse pointer currently is. Is that possible?

谢谢您的答案！

问候，丹尼尔

PS：我来自德国，只是说（语言错误）

PS: I'm from germany, just saying (language mistakes)

推荐答案

href =http://stackoverflow.com/questions/4395420/get-the-color-a-pixel-on-the-screen-in-objective-c-cocoa-app>此问题和答案作为起点，这是一个功能齐全的命令行程序。您还需要链接到Cocoa Framework。

Using this question and answer as a starting point, this is a fully functional command line program. You also need to link to the Cocoa Framework.

#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>

int main(int argc, const char * argv[])
{
    @autoreleasepool {

        // Grab the current mouse location.
        NSPoint mouseLoc = [NSEvent mouseLocation];

        // Grab the display for said mouse location.
        uint32_t count = 0;
        CGDirectDisplayID displayForPoint;
        if (CGGetDisplaysWithPoint(NSPointToCGPoint(mouseLoc), 1, &displayForPoint, &count) != kCGErrorSuccess)
        {
            NSLog(@"Oops.");
            return 0;
        }

        // Grab the color on said display at said mouse location.
        CGImageRef image = CGDisplayCreateImageForRect(displayForPoint, CGRectMake(mouseLoc.x, mouseLoc.y, 1, 1));
        NSBitmapImageRep* bitmap = [[NSBitmapImageRep alloc] initWithCGImage:image];
        CGImageRelease(image);
        NSColor* color = [bitmap colorAtX:0 y:0];
        NSLog(@"%@", color);
        [bitmap release];
    }
    return 0;
}

如果要继续运行，您需要采取其他措施创建和驱动运行循环。

If you want to to keep running you'll need to take additional measures to create and drive a run loop.

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