地图绘画

 

首先要说明的是这两个类是完成划线的基础类.利用它们可以实现我们想要的效果

1.MKPolyline ：用于地图上面划线的类

 

2.MKPolylineView：用于展示线的视图

 

下面是实现画一组坐标点之间的划线

 

#import <MapKit/MapKit.h>

//遵循代理协议<MKMapViewDelegate>

 

 

//地图对象

@property (nonatomic, strong) MKMapView *mapView;

//1
@property (nonatomic, strong) MKPolyline *routeLine;
//2

@property (nonatomic, strong) MKPolylineView *routeLineView;

 

 

//覆盖---就是绘画的直线
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay
{
    if(overlay == self.routeLine) {
        if(nil == self.routeLineView) {
            self.routeLineView = [[MKPolylineView alloc] initWithPolyline:self.routeLine];
            self.routeLineView.fillColor = [UIColor redColor];
            self.routeLineView.strokeColor = [UIColor cyanColor];
            self.routeLineView.lineWidth = 5;
        }
        return self.routeLineView;
    }
    return nil;
}

 

#pragma mark ---开始绘画
//开始绘画
- (void)drawTestLine
{
 
    //创建一个可变数组，用来存放CLLocation对象的所有数组
    _array = [NSMutableArray array];
   
    for (int i = 0; i < _pointArray.count; i ++) {
       
        PictureImageModel *model = _pointArray[i];
#warning =========
        //坐标
        CLLocation *loca = [[CLLocation alloc] initWithLatitude:model.latitude longitude:model.longitude];
       
        [_array addObject:loca];
       
    }
   
   
   
    //调用两点之间的连线
  
    [self drawLineWithLocationArray:_array];
}

#warning ------
//绘画的数组
- (void)drawLineWithLocationArray:(NSArray *)locationArray
{
    //获取传过来的数组的个数
    NSInteger pointCount = [locationArray count];
   
    //动态调整数组大小
    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 = [MKPolyline polylineWithCoordinates:coordinateArray count:pointCount];
   
    [self.mapView setVisibleMapRect:[self.routeLine boundingMapRect]];
    [self.mapView addOverlay:self.routeLine];
   
    free(coordinateArray);
    coordinateArray = NULL;
   
   
   
   
   
}