MacOS 开发, 视图的截屏

- (void)makeScreenPicture {

    [self.view lockFocus];

    NSData * data = [self.view dataWithPDFInsideRect:self.view.bounds];

    NSData* convertData = [[NSImage alloc]initWithData:data].TIFFRepresentation;

    [self.view unlockFocus];

    NSFileManager * fileMgr = [NSFileManager defaultManager];

    NSString * path = @"/Users/yourName/Desktop/mytest.png";

    [fileMgr createFileAtPath:pathcontents:convertData attributes:nil];

    NSURL* fileUrl = [NSURL fileURLWithPath:path];

//截屏之后 在finder中打开.

    [[NSWorkspace sharedWorkspace] activateFileViewerSelectingURLs:@[fileUrl]];

}