首先,我想透露我是一名新开发人员,刚开始使用Xamarin和C Sharp进行编码。
好的。因此,我正在为应用程序中的地图图钉创建自定义渲染器。我一直在使用下面的示例代码:https://github.com/xamarin/xamarin-forms-samples/tree/master/CustomRenderers/Map/Pin
目前,我正在尝试在图钉上设置弹出窗口,以便单击它们时,它们将转到应用程序中的页面,或者可能会弹出一个窗口,提供有关该特定图钉位置的更多详细信息。当前,当我单击图钉弹出窗口时,它将带我到网站。
以下是该应用的屏幕截图: enter image description here
我一直在看这段代码,我正试图找出是否可以将URL更改为本地页面?
InitializeComponent();
var position1 = new Position(52.649005, -7.250712);
var position2 = new Position(52.648061, -7.252879);
var position3 = new Position(52.650519, -7.249260);
var position4 = new Position(52.652680, -7.244724);
var position5 = new Position(52.648061, -7.252879);
var position6 = new Position(52.648061, -7.252879);
var pin1 = new CustomPin
{
Type = PinType.Place,
Position = position1,
Label = "Butler House",
Address = "394 Pacific Ave, San Francisco CA",
Id = "test",
Url = "http://xamarin.com/about/"
};
var pin2 = new CustomPin
{
Type = PinType.Place,
Position = position2,
Label = "Talbots Tower",
Address = "394 Pacific Ave, San Francisco CA",
Id = "",
Url = "http://xamarin.com/about/"
};
我认为,在CustomMapRender.cs文件中,我需要能够更改CustomPin.URL,以允许我单击并获取应用程序本身中的本地页面。
protected override MKAnnotationView GetViewForAnnotation(MKMapView mapView, IMKAnnotation annotation)
{
MKAnnotationView annotationView = null;
if (annotation is MKUserLocation)
return null;
var customPin = GetCustomPin(annotation as MKPointAnnotation);
if (customPin == null)
{
throw new Exception("Custom pin not found");
}
annotationView = mapView.DequeueReusableAnnotation(customPin.Id.ToString());
if (annotationView == null)
{
annotationView = new CustomMKAnnotationView(annotation, customPin.Id.ToString());
annotationView.Image = UIImage.FromFile("pin-red-10.png"); //pin is set by image not changable by colour attributes
annotationView.CalloutOffset = new CGPoint(0, 0);
annotationView.LeftCalloutAccessoryView = new UIImageView(UIImage.FromFile("Ireland-icon.png"));
annotationView.RightCalloutAccessoryView = UIButton.FromType(UIButtonType.DetailDisclosure);
((CustomMKAnnotationView)annotationView).Id = customPin.Id.ToString();
((CustomMKAnnotationView)annotationView).Url = customPin.Url;
}
annotationView.CanShowCallout = true;
return annotationView;
对此我的任何帮助或见解都将受到赞赏,因为我目前正在圈子里尝试许多不同的事情。
谢谢 迈克尔
答案 0 :(得分:0)
GetViewForAnnotation方法用于获取 MKAnnotationView (即显示Pin细节的标注)。
您需要的是MKMapView标注的tap事件。将EventHandler添加到 CalloutAccessoryControlTapped 并处理导航逻辑。
在提供的示例中为this part
void OnCalloutAccessoryControlTapped(object sender, MKMapViewAccessoryTappedEventArgs e)
{
// handle navigation here instead of opening the webpage
var customView = e.View as CustomMKAnnotationView;
if (!string.IsNullOrWhiteSpace(customView.Url))
{
UIApplication.SharedApplication.OpenUrl(new Foundation.NSUrl(customView.Url));
}
}