如何处理自定义标注视图上的点击？ [英] How to handle taps on a custom callout view?

问题描述

我正在添加一个这样的标注视图：

I am adding a callout view like this:

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 函数永远不会被调用...我很想知道为什么并得到一些能够处理inter的东西我的标注视图的操作。

Though my onCalloutViewTap function is never called... I am curious to understand why and to get something that works to handle interactions with my callout view.

推荐答案

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了边界，因此子视图无法识别该标记。您需要在注释视图中覆盖 pointInside：withEvent：方法，以便您的标注实际检测到触摸。

It's because your annotation view only detects touches inside its bounds. Since your callout view extends beyond the bounds, the subview doesn't recognize the tap. You need to override the pointInside:withEvent: method in the annotation view so your callout will actually detect the touch.

这是Objective-C中的一个例子：

Here's an example in Objective-C:

- (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;
}

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