4.在地图上两个坐标点之间画一条直线

- (void)drawTestLine

{

CLLocation*location0 = [[CLLocationalloc]initWithLatitude:39.954245longitude:116.312455];//北京杭州

CLLocation*location1 = [[CLLocationalloc]initWithLatitude:30.247871longitude:120.127683];

NSArray*array = [NSArrayarrayWithObjects:location0, location1,nil];

[self  drawLineWithLocationArray:array];

}

- (void)drawLineWithLocationArray:(NSArray*)locationArray

{

int pointCount = [locationArray count];

CLLocationCoordinate2D* coordinateArray = (CLLocationCoordinate2D*)malloc(pointCount *sizeof(CLLocationCoordinate2D));

for(int i =0; i < pointCount; ++i) {

CLLocation*location = [locationArray objectAtIndex:i];

coordinateArray[i] = [location coordinate];

}

self.routeLine= [MKPolylinepoly lineWithCoordinates:coordinateArray count:pointCount];

[self.mapView setVisibleMapRect:[self.routeLineboundingMapRect]];

[self.mapView addOverlay:self.routeLine];

free(coordinateArray);

coordinateArray =NULL;

}

/**

*当添加一个覆盖层数据模型到地图上时，地图会调用这个方法，查找对应的覆盖层视图(渲染图层)

*

*  @param mapView地图

*  @param overlay覆盖层数据模型

*

*  @return覆盖层视图

*/

- (MKOverlayRenderer*)mapView:(MKMapView*)mapView rendererForOverlay:(id)overlay

{

if( [overlayisKindOfClass:[MKPolylineclass]]) {

MKPolylineRenderer*routeLineView = [[MKPolylineRenderer alloc]initWithPolyline:self.routeLine];

//self.routeLineView.fillColor = [UIColor redColor];

routeLineView.strokeColor= [UIColorredColor];

routeLineView.lineWidth=1;

return routeLineView;

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent*)event{

UITouch* t = [touches allObjects].firstObject;

CGPoint point = [t locationInView:self.mapView];

CLLocationCoordinate2D coordinate2D = [self.mapView convertPoint:point toCoordinate FromView:self.mapView];

CLLocation* location =

[[CLLocation alloc]initWithLatitude:coordinate2D.latitude  longitude:coordinate2D.longitude];

if(_lastLocation2) {

CLLocationDistance distance = [location  distanceFromLocation:_lastLocation2];

//将用户连续两次点击地图时的点画一条直线

//NSArray *array = [NSArray arrayWithObjects:location, _lastLocation2,nil];

//[self drawLineWithLocationArray:array];

}else{

_lastLocation2= location;

}

//每点击一下地图，就在该位置和用户的位置画一条直线

//NSArray

*array = [NSArray arrayWithObjects:location,

self.mapView.userLocation.location, nil];

//[self drawLineWithLocationArray:array];

}