override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. view.backgroundColor = UIColor.white  //應(yīng)用內(nèi)實(shí)現(xiàn)粘貼，這個(gè)txt用來(lái)測(cè)試的 let txt = UITextField(frame: CGRect(x: 100, y: 100, width: 100, height: 33)) txt.backgroundColor = UIColor.yellow txt.placeholder = "shuru" view.addSubview(txt)  //1.測(cè)試剪切板 testPasteBoard(str: "123")   }  /// 測(cè)試剪切板，實(shí)現(xiàn)代碼拷貝內(nèi)容 /// 結(jié)論：應(yīng)用程序內(nèi)可實(shí)現(xiàn)長(zhǎng)按輸入框后，粘貼，應(yīng)用程序外依然可以。 func testPasteBoard(str:String) {  //就這兩句話就實(shí)現(xiàn)了 let paste = UIPasteboard.general paste.string = str   }