在注释图中使用 for 循环数组在 leftcalloutaccessoryview 中设置唯一图像 swift

Question

我有一组图像需要在 MKAnnotation 的 leftcalloutaccessoryview 中设置为左图标。我已经使用 if else 语句完成了它。我的问题是，如果我可以使用数组循环在 'for' 语句中编写代码，而不是使用 'if else' 语句，那就太好了。有人可以帮我解决这个问题吗？如何使用数组中的一组图像和坐标使用 for 循环数组对 'leftcalloutaccessoryview' 进行编码？我已经面对这个代码一个月了:(...谢谢你们

    //Define nearby Place of Interest
    let latArray = [24.469546, 24.469450]
    let longArray = [39.609105, 39.613062]
    let poiTitle = ["An-Nisa 1","An-Nisa 2"]
    let poiSubTitle = ["Gate 1","Gate 2"]
  //  let imageName = ["Jons.png","Locus.png"]

    for var i=0;i<poiSubTitle.count;i++
    {
        var latPoi: CLLocationDegrees = latArray[i]
        var longPoi: CLLocationDegrees = longArray[i]

        var locationPoiAnnot = MKPointAnnotation()

        locationPoiAnnot.title = poiTitle[i]
        locationPoiAnnot.subtitle = poiSubTitle[i]
        var locationPoi : CLLocationCoordinate2D = CLLocationCoordinate2DMake(latPoi,longPoi)
        locationPoiAnnot.coordinate = locationPoi


        self.mapView.addAnnotation(locationPoiAnnot)

    }

}
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
   if annotation is MKUserLocation {
              //return nil so map view draws "blue dot" for standard user location
        return nil
    }

    let reuseId = "pin"

    var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView

    if pinView == nil {
        pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
        pinView!.canShowCallout = true
        pinView!.animatesDrop = true

        let arrowButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
        arrowButton.frame.size.width = 44
        arrowButton.frame.size.height = 44
        arrowButton.setImage(UIImage(named: "arrow.jpeg"), forState: .Normal)

        pinView!.rightCalloutAccessoryView = arrowButton

    var imageview = UIImageView(frame: CGRectMake(0, 0, 45, 45))

   if(annotation.subtitle == "I am here!")
        {

            imageview.image=UIImage(named: "Locus.png")

        }
        else if(annotation.subtitle == "Gate 1")
        {
            imageview.image=UIImage(named: "Jons.png")

        }

        else if(annotation.subtitle == "Gate 2")
        {

        imageview.image=UIImage(named: "Katara.png")

        }


        pinView!.leftCalloutAccessoryView = imageview


}
    else {
        pinView!.annotation = annotation
    }
    return pinView    }

Answer 1

想知道这是否有帮助：

let poiSubTitle = ["Gate 1","Gate 2"]
let imageName = ["Jons.png","Locus.png"]

for(var i = 0 ; i < imageName.count ; i++)
{
    if(annotation.subtitle == poiSubTitle[i])
    {
        imageview.image = UIImage(named: imageName[i])
    }
}

pinView!.leftCalloutAccessoryView = imageview

因此只需将所有 30 个 POI 标题添加到 poiSubTitle 并将图像路径添加到 imageName 而不更改 for 循环...

在注释图中使用 for 循环数组在 leftcalloutaccessoryview 中设置唯一图像 swift

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