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请问任何人都可以解释并帮助我如何解决这个警告? thx提前。警告:本地声明的'mapView'隐藏实例变量
-(void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated {
mapRegion=mapView.region; //first warning
}
-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
newRegion=mapView.region; //second warning
if(mapRegion.span.latitudeDelta>newRegion.span.latitudeDelta||mapRegion.span.longitudeDelta>newRegion.span.longitudeDelta)
shouldAdjustZoom=NO;
}