Swift中UIPanGestureRecognizer的奇怪问题

Question

我试图在我的观点中添加潘手势，但我不知道为什么它不想工作。下面是我的UIView的代码：

    self.infoView = UIView()
    self.mapView.addSubview(infoView)
    infoView.backgroundColor = .white
    infoView.layer.cornerRadius = 10.0
    infoView.layer.masksToBounds = true
    infoView.isUserInteractionEnabled = true
    infoView.translatesAutoresizingMaskIntoConstraints = false

    let panGesture = UIPanGestureRecognizer(target: self, action: #selector(self.moveInfoView(recognizer:)))
    infoView.addGestureRecognizer(panGesture)

我在我的UIViewController中将它定义为：

var infoView: UIView!

我的pan手势方法看起来是：

@objc func moveInfoView(recognizer:UIPanGestureRecognizer) {
    let translation = recognizer.translation(in: self.view)
    if let view = recognizer.view {
        view.center = CGPoint(x:view.center.x + translation.x,
                              y:view.center.y + translation.y)
    }
    recognizer.setTranslation(CGPoint.zero, in: self.view)
}

我真的看不到我的错误。似乎一切都是正确的，但我似乎错了。你能指出我的错误吗？

更新

我的制约因素：

let constraints = [
        // InfoView constraints
        NSLayoutConstraint(item: infoView, attribute: .bottom, relatedBy: .equal, toItem: self.view.safeAreaLayoutGuide, attribute: .bottom, multiplier: 1.0, constant: 0.0),
        NSLayoutConstraint(item: infoView, attribute: .leading, relatedBy: .equal, toItem: self.view, attribute: .leading, multiplier: 1.0, constant: 0.0),
        NSLayoutConstraint(item: infoView, attribute: .trailing, relatedBy: .equal, toItem: self.view, attribute: .trailing, multiplier: 1.0, constant: 0.0),
        infoViewHeightConstraint]

哪里

let infoViewHeightConstraint = infoView.heightAnchor.constraint(greaterThanOrEqualToConstant: 112.0)

Answer 1

我怀疑问题在于您的观点是GMSMapView的一个子视图。地图视图已经添加了一组手势识别器，手势识别器回调被发送到GMSMapView实例，而不是您的子视图。尽管在settings上有一个GMSMapView属性，但它允许您为映射配置用户界面设置。尝试下面的代码来启用手势：

self.mapView.settings.consumesGesturesInView = false

还有其他设置，您可以自定义那里。希望这能有所帮助