ios - MvvmCross iOS : How to bind MapView Annotation to jump to another view?
<p><p>当点击标注附件按钮时，如何绑定(bind) MapView 的注释以切换到不同的 View ？如何实现注解的 CalloutAccessoryControlTapped 方法？</p>
<p>或者最好的方法是什么？</p>
<p>这是我的代码:</p>
<pre><code>
public class MapView : MvxViewController
{
public override void ViewDidLoad()
{
Title = "Map";
base.ViewDidLoad();
var mapView = new MKMapView(new RectangleF(0, 0, 320, UIScreen.MainScreen.Bounds.Height - 20 - 44))
{
MapType = MKMapType.Standard,
ZoomEnabled = true,
ScrollEnabled = true,
Delegate = new MapDelegate(),
};
View.AddSubview(mapView);
var center = new CLLocationCoordinate2D(ViewModel.CurrentLat, ViewModel.CurrentLong);
var span = new MKCoordinateSpan(5.0, 5.0);
var region = new MKCoordinateRegion(center, span);
mapView.SetRegion(region, true);
mapView.AddAnnotation(CreateNewAnnotation(ViewModel.CurrentLat, ViewModel.CurrentLong, "You are here"));
var set = this.CreateBindingSet<MapView, MapViewModel>();
set.Bind(mapView).For(???).To(vm => vm.showDetailCommand); // how can I bind to the map annotation and switch to other view when user click it?
set.Apply();
}
protected class MapDelegate : MKMapViewDelegate
{
public override MKAnnotationView GetViewForAnnotation(MKMapView mapView, MonoTouch.Foundation.NSObject annotation)
{
var pinId = "locationPinId";
var pinView = (LocationAnnotationView)mapView.DequeueReusableAnnotation(pinId) ??
new LocationAnnotationView
{
Annotation = annotation,
RestorationIdentifier = pinId,
Image = UIImage.FromBundle("images/map_pointer_icon_small.png"),
};
var buttonView = new UIButton(new RectangleF(0, 0, 27, 27));
buttonView.SetImage(UIImage.FromBundle("images/blue_arrow.png"), UIControlState.Normal);
buttonView.Tag = 88888;
pinView.RightCalloutAccessoryView = buttonView;
return pinView;
}
public override void CalloutAccessoryControlTapped(MKMapView mapView, MKAnnotationView view, UIControl control)
{
// how can I bind this method, so when the user click on the annotation it can switch to other view?
}
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您可以通过多种方式做到这一点。</p>
<p>鉴于您已经在使用固定的非绑定(bind)(非更新)单项显示，那么最简单的方法可能是您只需扩展您的 Annotation 以便使用 <code>ICommand</code> 创建它以及 lat、lng 和 label:</p>
<pre><code>CreateNewAnnotation(
ViewModel.CurrentLat,
ViewModel.CurrentLong,
ViewModel.ShowDetailCommand,
"You are here")
</code></pre>
<p>完成后，<code>ICommand</code>:</p>
<ul>
<li>然后可以轻松地从您的 callout 或 buttonView 的 <code>TouchUpInside</code> 或 <code>CalloutAccessoryControlTapped</code> 处理程序调用。</li>
<li>可以在 <code>ShowDetailCommand</code> 中作为导航命令实现 - 参见 <a href="http://mvvmcross.wordpress.com/" rel="noreferrer noopener nofollow">http://mvvmcross.wordpress.com/</a> 中的 N=5导航示例。</li>
</ul>
<p>如果您确实想要一个更加动态的注解 - 具有真正的数据绑定(bind)，那么您需要开始考虑将数据绑定(bind)添加到您的自定义 Annotation 类、您的自定义 AnnotationView 以及您的自定义 MapViewDelegate - 这个类似于将数据绑定(bind)添加到 UIView 的方式 - 参见 <a href="https://github.com/slodge/MvvmCross/blob/v3/Cirrious/Cirrious.MvvmCross.Binding.Touch/Views/MvxView.cs" rel="noreferrer noopener nofollow">MvxView.cs</a> - 但对于您当前的示例，可能<em>矫枉过正</em>。</p></p>
<p style="font-size: 20px;">关于ios - MvvmCross iOS : How to bind MapView Annotation to jump to another view?，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/17756846/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/17756846/
</a>
</p>
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