ios sdk公开课lesson利用长按手势选择目地

iOSSDKBBAA屏幕坐标 坐标，获得目的@brief @paramcoordinate@paramview指定的view@return基于指定view-(CGPoint)convertCoordinate:@brief将指定view坐标系的坐标转换为@parampoint指定view坐标系的坐标@paramview指定的viewtoCoordinateFromView:(UIView*)view;

@interfaceViewController()<MAMapViewDelegate,AMapSearchDelegate,UITableViewDataSource,UITableViewDelegate,UIGestureRecognizerDelegate>{…}

UILongPressGestureRecognizer*_longPressGesture;MAPointAnnotation*_destinationPoint;-{_annotations=[NSMutableArray_pois=_longPressGesture=[[UILongPressGestureRecognizeralloc]initWithTarget:self_longPressGesture.delegate=[_mapView}-(void)handleLongPress:(UILongPressGestureRecognizer{if(gesture.state=={CGPointp=[gesturelocationInView:_mapView];NSLog(@"presson(%f,%f)",p.x,p.y);}}5

-(void)handleLongPress:(UILongPressGestureRecognizer{if(gesture.state=={

CLLocationCoordinate2Dcoordinate=[_mapViewconvertPoint:[gesturelocationInView:_mapView]toCoordinateFromView:_mapView];//if(_destinationPoint!={

//[_mapView_destinationPoint=}_destinationPoint=[[MAPointAnnotationalloc]_destinationPoint.coordinate=_destinationPoint.title=[_mapView}}67 返回结果类型

8-{…UIButton*pathButton=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];pathButton.frame=CGRectMake(140,CGRectGetHeight(_mapView.bounds)-60,40,40);pathButton.autoresizingMask=UIViewAutoresizingFlexibleRightMargin|pathButton.backgroundColor=[UIColorwhiteColor];[pathButtonsetImage:[UIImageimageNamed:@"path"][pathButtonaddTarget:selfaction:@selector(pathAction)[_mapView}-{if(_destinationPoint==nil||_currentLocation==nil||_search=={NSLog(@"pathsearchfailed");}AMapNavigationSearchRequest*request=[[AMapNavigationSearchRequestalloc]request.searchType=request.origin=[AMapGeoPointlocationWithLatitude:_currentLocation.coordinate.latituderequest.destination=[AMapGeoPointlocationWithLatitude:_destinationPoint.coordinate.latitude[_search}9 -(void)onNavigationSearchDone:(AMapNavigationSearchRequest*)requestresponse:(AMapNavigationSearchResponse{if(response.count>{[_mapViewaddOverlays:_pathPolylines];

[_mapViewshowAnnotations:@[_destinationPoint,_mapView.userLocation]}}-(NSArray*)polylinesForPath:(AMapPath{if(path==nil||path.steps.count=={}

解析每一个[path.stepsenumerateObjectsUsingBlock:^(AMapStep*step,NSUIntegeridx,BOOL*stop)NSUIntegercount=[polylinesaddObject:polyline];return}解

-(CLLocationCoordinate2D*)coordinatesForString:(NSStringparseToken:(NSString*)token{if(string=={return}if(token=={token=}NSString*str=if(![token{}{}

str=[string str=[NSStringNSUIntegercount=[componentscount]/2;if(coordinateCount!={*coordinateCount=}CLLocationCoordinate2D*coordinates=(CLLocationCoordinate2D*)malloc(count*for(inti=0;i<count;{coordinates[i].longitude=[[componentsobjectAtIndex:2*i] =[[componentsobjectAtIndex:2*i+1]doubleValue];}return}其中我们用到了_pathPolylines{…NSArray}

-(void)handleLongPress:(UILongPressGestureRecognizer{…if(_destinationPoint!={//[_mapView_destinationPoint=[_mapView_pathPolylines=}…}使用MAPolyline

在地图上绘制线的数据模型，是地图覆盖物（MAOverlay）在地图上绘制线的样式，是MAOverlayView添加@brief向地图窗口添加Overlay，需要实现MAMapViewDelegate的-mapView:viewForOverlay:函数来生成标注对应的View@paramoverlay要添加的overlay-(void)addOverlay:(id@brief向地图窗口添加一组Overlay，需要实现BMKMapViewDelegate的-mapView:viewForOverlay:函数来生成标注对应@paramoverlays要添加的overlay-(void)addOverlays:(NSArray实现MAMapView-(MAOverlayView*)mapView:(MAMapView*)mapView

-(MAOverlayView*)mapView:(MAMapView*)mapView{if([overlayisKindOfClass:[