下面是如何将字符串放入剪贴板的方法：
@implementation
NSString (PasteboardGoodies)
- (void) sendToPasteboard
{
[[NSPasteboard generalPasteboard]
declareTypes: [NSArray arrayWithObject: NSStringPboardType]
owner:nil];
[[NSPasteboard generalPasteboard]
setString: self
forType: NSStringPboardType];
} // sendToPasteboard
@end
// PasteboardGoodies
