点击手势事件不适用于UIView

时间:2017-09-15 04:25:06

标签: swift uiview uitapgesturerecognizer

我正在尝试向UIView添加点击手势,但手势未被识别。

“iconBadgeView”是一个UIView,其中包含在参数中传递的已定义大小的图像。

Future[Seq[Any]]

有一个委托者附加到同一个类,并且函数实现如下:

lazy var cardioVascularIcon : IconBadgeView! = {

    let iconBadgeView = IconBadgeView(frame: CGRect(x: 0, y: 0, width: 95, height: 95), data:["big":"db_history"])

    let tapEvent = UITapGestureRecognizer(target: self, action: #selector(loadNewView(sender:)))

    tapEvent.numberOfTapsRequired = 1
    iconBadgeView.translatesAutoresizingMaskIntoConstraints = false

    iconBadgeView.isUserInteractionEnabled = true       
    iconBadgeView.addGestureRecognizer(tapEvent)
}()

函数loadNewView未被调用。我不确定代码中有什么问题。请有人帮忙。

我将iconBadgeView添加到superview,如下所示:

func loadNewView(sender: UITapGestureRecognizer)  {
    print("Tapped")
}

2 个答案:

答案 0 :(得分:1)

我找到了解决这个问题的方法。我使用了一个按钮而不是一个标签,现在工作正常。以下是我正在使用的代码:

func createButton (buttonWidth : CGFloat?, buttonTitle : String?, buttonFont : UIFont?, imageName : String?, buttonColor : UIColor?) -> UIButton {
    let newButton = UIButton(type: . custom)
    newButton.showsTouchWhenHighlighted = false
    newButton.translatesAutoresizingMaskIntoConstraints = false
    newButton.adjustsImageWhenHighlighted = false

    if let title = buttonTitle {
        newButton.setTitle(title, for: .normal)
    }
    if let color = buttonColor {
        if let _ = newButton.titleLabel {
            newButton.setTitleColor(color, for: .normal)
        }
    }

    if let btnWidth = buttonWidth {
        newButton.frame = CGRect(x: 0, y: 0, width: btnWidth, height: btnWidth)
        newButton.layer.cornerRadius = 0.5 * newButton.bounds.size.width
        newButton.clipsToBounds = true
    }
    if let img = imageName {
        newButton.setImage(UIImage(named: img), for: .normal)
    }
    if let font = buttonFont {
        newButton.titleLabel?.font = font
    }

    return newButton
}
let addDiagButton = self.createButton(buttonWidth: nil, buttonTitle: addButtonTitle, buttonFont: UIFont.regularDisplayOfSize(30), imageName: nil, buttonColor: UIColor(red: 111, green: 160, blue: 186))

addDiagButton.addTarget(self, action: #selector(addDiag(sender:)), for: .touchUpInside)

上面的代码有一个共同的功能,它创建一个按钮并附加触发事件。该代码工作正常。

为了使其行为像标签点击,我在createButton函数中添加了一行。

newButton.adjustsImageWhenHighlighted = false

这将限制单击按钮时的闪光效果。

答案 1 :(得分:0)

你的iconBadgeView消失了,因为它是本地变量。

你必须初始化cardioVascularIcon var。

lazy var cardioVascularIcon : IconBadgeView! = {

  cardioVascularIcon.frame = CGRect(x: 0, y: 0, width: 95, height: 95)
  //here call function which sets data property

  let tapEvent = UITapGestureRecognizer(target: self, action: #selector(loadNewView(sender:)))

  tapEvent.numberOfTapsRequired = 1
  cardioVascularIcon.translatesAutoresizingMaskIntoConstraints = false

  cardioVascularIcon.isUserInteractionEnabled = true       
  cardioVascularIcon.addGestureRecognizer(tapEvent)
}()