虽然接受的答案是 UIPasteboard 工作原理的一个很好的演练，但我想我会在这里为大家发布相关的片段方便:

Although the accepted answer is a good walkthrough of how UIPasteboard works, I figured I'd post the relevant snippet right here for everyone's convenience:

Obj-C

UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.string = @"Paste me!";

斯威夫特 2.2

let pasteBoard = UIPasteboard.generalPasteboard()
pasteBoard.string = "Paste me!"

斯威夫特 3+:

let pasteBoard = UIPasteboard.general
pasteBoard.string = "Paste me!"