objective-c - 使用 objective c for mac 截屏

Question

有谁知道如何在 mac os 中使用 objective c 捕获屏幕？更具体地说，我如何捕获事件/聚焦的应用程序屏幕，然后将图像创建到指定路径。
非常感谢任何帮助。

Answer 1

@丹尼尔，您不需要理解和实现整个“Son of Grab”。您只需要下面的代码。

下面的函数会给你截图

// 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;