在這次IOS應用開發教程中,我們打算實現手勢識別。正如你所知道的,IOS支持大量的手勢操作,它們能提供了很好的應用控制和出色用戶體驗。
已經完成了單擊識別器,但無法弄清楚如何將該單擊識別器改爲雙擊.
代碼:
import Foundation import UIKit class MainBoardController: UIViewController{ let tap = UITapGestureRecognizer() override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view,typically from a nib. var swipe: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self,action: "GotoProfile") swipe.direction = UISwipeGestureRecognizerDirection.Right self.view.addGestureRecognizer(swipe) tap.addTarget(self,action: "GotoCamera") view.userInteractionEnabled = true view.addGestureRecognizer(tap) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } func GotoProfile(){ self.performSegueWithIdentifier("Profilesegue",sender: nil) } func GotoCamera(){ self.performSegueWithIdentifier("Camerasegue",sender: nil) } }
解決方法
最終用擴展解決了這個問題:
override func viewDidLoad() { super.viewDidLoad() let tapGR = UITapGestureRecognizer(target: self,action: #selector(PostlistViewController.handleTap(_:))) tapGR.delegate = self tapGR.numberOfTapsRequired = 2 view.addGestureRecognizer(tapGR) } extension MainBoardController: UIGestureRecognizerDelegate { func handleTap(_ gesture: UITapGestureRecognizer){ print("doubletapped") } }
總結
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