MKOverlayView.CanDrawMapRect(MKMapRect, nfloat) Method
Definition
Important
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Returns true if the MKOverlayView has the data it needs to draw properly.
[Foundation.Export("canDrawMapRect:zoomScale:")]
public virtual bool CanDrawMapRect (MapKit.MKMapRect mapRect, nfloat zoomScale);abstract member CanDrawMapRect : MapKit.MKMapRect * nfloat -> bool
override this.CanDrawMapRect : MapKit.MKMapRect * nfloat -> boolParameters
- zoomScale
- nfloat
The current scale factor.
Returns
The default value is true.
- Attributes
Remarks
Application developers can override this method so that it returns false until the MKOverlayView has all the data it needs in order to render properly. For instance, a weather overlay might return false until it has downloaded meteorological data.
If application developers return false from this method, they must subsequently call SetNeedsDisplay(MKMapRect, nfloat) when they have received the data and performed the calculations needed to make this function return true.