未检测到滑动 (Swift/iOS9)

Question

在我的viewDidLoad：

let swipeLeft = UISwipeGestureRecognizer(target: self, action: Selector("leftSwiped"))
        swipeLeft.direction = .Left
        self.view.addGestureRecognizer(swipeLeft

)

func leftSwiped()
    {
        print("here")
    }

“这里”从不打印。我尝试查看其他指南，但代码的核心与我的相同。我不认为我应该继承任何东西。我能得到一些帮助吗？

Answer 1

让 swipeLeft = UISwipeGestureRecognizer(target: self, action: 选择器（“leftSwiped”））

名称函数“leftSwiped”后缺少“:”

试试源码：

let swipeLeft = UISwipeGestureRecognizer(target: self, action: Selector("leftSwiped:"))

        swipeLeft.direction = .Left

        self.view.addGestureRecognizer(swipeLeft)