指南針圖像在此處旋轉地圖

Question

地圖方向以此代碼形式工作。但是羅盤圖像不會像地圖旋轉那樣旋轉。請幫助如何使羅盤在這裏映射

- (void)mapView:(NMAMapView *)mapView didReceiveRotation:(float)rotation atLocation:(CGPoint)location 
{ 
[self.mapView setOrientation:180 withAnimation:NMAMapAnimationLinear]; 
_comPassImg.transform =CGAffineTransformMakeRotation(rotation);//not working smoothly 
} 

Answer 1

你可以聽NMAMapView::NMAMapEvent::NMAMapEventOrientationChanged代替，例如：

[mapView respondToEvents:NMAMapEventOrientationChanged withBlock:^BOOL (NMAMapEvent event, NMAMapView *mapView, id eventData) { 
    _comPassImg.transform = CGAffineTransformMakeRotation(mapView.orientation); 
    return YES; 
}]; 

您也可以嘗試NMAOrientableMapMarker，看看是否適合你。