如何处理自定义标注视图上的点击？

Question

我正在添加这样的标注视图：

func mapView(mapView: MKMapView!,
        didSelectAnnotationView view: MKAnnotationView!) {
    let calloutView = UIView(frame:
        CGRect(x: 0, y: 0, width: 300, height: 120))

    calloutView.backgroundColor = UIColor.purpleColor()
    calloutView.center = CGPointMake(CGRectGetWidth(view.bounds) / 2.0, 0.0)
    calloutView.layer.anchorPoint = CGPointMake(0.5, 1.0)
    calloutView.layer.masksToBounds = false

    calloutView.userInteractionEnabled = true
    let calloutViewTapRecognizer = UITapGestureRecognizer(target: self,
        action: "onCalloutViewTap")
    calloutView.addGestureRecognizer(calloutViewTapRecognizer)

    view.addSubview(calloutView)
}

虽然我的 onCalloutViewTap 函数从未被调用过...我很想知道为什么，并想得到一些可以处理与我的标注视图交互的东西。

Answer 1

这是因为您的注释视图仅检测其边界内的触摸。由于您的标注视图超出范围，因此子视图无法识别水龙头。您需要覆盖注释视图中的 pointInside:withEvent: 方法，这样您的标注才能真正检测到触摸。

这是 Objective-C 中的示例：

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent*)event
{
    CGRect rect = self.bounds;
    BOOL isInside = CGRectContainsPoint(rect, point);

    if (!isInside)
    {
        for (UIView *view in self.subviews)
        {
            isInside = CGRectContainsPoint(view.frame, point);

            if (isInside)
            {
                break;
            }
        }
    }

    return isInside;
}

编辑:

Swift版本：

override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
    let rect = self.bounds
    var isInside = CGRectContainsPoint(rect, point)

    if (!isInside) {
        for subview in subviews {
            isInside = CGRectContainsPoint(subview.frame, point)

            if (isInside) {
                break
            }
        }
    }

    println(isInside)

    return isInside;
}

Answer 2

Swift 4.0

override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
    let rect = self.bounds;
    var isInside: Bool = rect.contains(point);
    if(!isInside)
    {
        for view in self.subviews
        {
            isInside = view.frame.contains(point);
            if isInside
            {
                break;
            }
        }
    }
    return isInside;
}
 override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
    let hitView = super.hitTest(point, with: event)
    if (hitView != nil)
    {
        self.superview?.bringSubview(toFront: self)
    }
    return hitView
}

Answer 3

正在从注释视图中删除 swift 5

override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        let hitView = super.hitTest(point, with: event)
        if (hitView != nil)
        {
            self.superview?.bringSubviewToFront(self)
        }
        return hitView
    }
    override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
        let rect = self.bounds;
        var isInside: Bool = rect.contains(point);
        if(!isInside)
        {
            for view in self.subviews
            {
                isInside = view.frame.contains(point);
                if isInside
                {
                    break;
                }
            }
        }
        return isInside;
    }

如何处理自定义标注视图上的点击？

How to handle taps on a custom callout view?

cocoa-touch

mapkit

ios

swift