我正在开发一个执行一些数学计算的应用程序，并将结果（包括文本和图形）发送到NSTextView .
这段代码可以很好地输出，但这就是问题所在：我希望用户可以选择/复制并将生成的图像拖放到其他文本编辑器（如Pages或Text Edit）中 .
当用户从我的textview拖动图像时，它会被拖动，但没有任何内容粘贴到目标：
（void）drawRect：（NSRect）dirtyRect {[super drawRect：dirtyRect]; NSBezierPath * aPath = [NSBezierPath bezierPath]; NSImage * anImage = [[NSImage alloc] initWithSize：NSMakeSize（200.0,200.0）]; [anImage lockFocus]; //一些图纸：NSColor * blue = [NSColor blueColor];
[blue setStroke];
aPath = [NSBezierPath bezierPath];
[aPath setLineWidth：20];
[aPath moveToPoint：NSMakePoint（20.0,20.0）];
[aPath lineToPoint：NSMakePoint（100.0,100.0）];
[aPath stroke];
[anImage unlockFocus]; //重新捕获并将其更改为位图
NSSize size = [anImage size]; [anImage lockFocus]; NSBitmapImageRep * rep = [[NSBitmapImageRep alloc] initWithFocusedViewRect：
NSMakeRect（0,0，size.width，size.height）];
[anImage unlockFocus]; NSData * jpgData = [rep representationUsingType：NSJPEGFileType properties：nil];
NSImage * newImage = [[NSImage alloc] initWithData：jpgData]; //只附加一次attrited字符串 . BOOL isDrownYet in header if（！isDrownYet）{NSTextAttachmentCell * attachmentCell1 = [[NSTextAttachmentCell alloc] initImageCell：newImage];
NSTextAttachment * attachment1 = [[NSTextAttachment alloc] init];
[attachment1 setAttachmentCell：attachmentCell1];
NSMutableAttributedString * attributedString1 =（NSMutableAttributedString *）[NSMutableAttributedString
attributionStringWithAttachment：attachment1]; [self.textStorage appendAttributedString：attributedString1];
isDrownYet = YES;
}}