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使用 Objective C for Mac 进行屏幕截图

发布于 2024-08-09 17:41:25 字数 94 浏览 6 评论 0原文

有谁知道如何在 macOS 中使用 Objective C 捕获屏幕？更具体地说，如何捕获活动/聚焦的应用程序屏幕，然后在指定路径中创建图像。
非常感谢任何帮助。

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依靠 2024-08-16 17:41:25

@丹尼尔，
你不需要理解和实现整个“Grab之子”。您只需要下面的代码。

以下函数将为您提供屏幕截图

// This just invokes the API as you would if you wanted to grab a screen shot. The equivalent using the UI would be to
// enable all windows, turn off "Fit Image Tightly", and then select all windows in the list.
CGImageRef screenShot = CGWindowListCreateImage(CGRectInfinite, kCGWindowListOptionOnScreenOnly, kCGNullWindowID, kCGWindowImageDefault);

使用以下代码将其转换为 NSImage

NSBitmapImageRep *bitmapRep = [[NSBitmapImageRep alloc] initWithCGImage:screenShot];
// Create an NSImage and add the bitmap rep to it...
NSImage *image = [[NSImage alloc] init];
[image addRepresentation:bitmapRep];
[bitmapRep release];
bitmapRep = nil;

@Daniel,
You don't need to understand and implement the whole "Son of Grab". You just need the code below.

The following function will give you the screenshot

// This just invokes the API as you would if you wanted to grab a screen shot. The equivalent using the UI would be to
// enable all windows, turn off "Fit Image Tightly", and then select all windows in the list.
CGImageRef screenShot = CGWindowListCreateImage(CGRectInfinite, kCGWindowListOptionOnScreenOnly, kCGNullWindowID, kCGWindowImageDefault);

Use the following code to convert it to a NSImage

NSBitmapImageRep *bitmapRep = [[NSBitmapImageRep alloc] initWithCGImage:screenShot];
// Create an NSImage and add the bitmap rep to it...
NSImage *image = [[NSImage alloc] init];
[image addRepresentation:bitmapRep];
[bitmapRep release];
bitmapRep = nil;

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