iOS-BMK标注&覆盖物

在iOS开发中，地图算是一个比较重要的模块。我们常用的地图有高德地图，百度地图，谷歌地图，对于中国而言，苹果公司已经不再使用谷歌地图，官方使用的是高德地图。下面将讲述一下百度地图开发过程中的一些小的知识点。

对于如何配置百度地图的开发环境，在此不再讲述，具体可以参考：http://developer.baidu.com/map/index.php?title=iossdk/guide/buildproject

百度地图iOS的API下载地址：http://developer.baidu.com/map/index.php?title=iossdk/sdkiosdev-download

关于百度地图的基本使用，我们可以参考百度地图的开发文档，在此主要总结一下开发文档中一些重要的知识点和延伸点。（地图版本IOS SDK 2.9.0）

首先说明一下百度地图开发中可能遇到的问题：

如何添加标注（系统标注和自定义标注）

 //添加标记
 -(void)viewDidAppear:(BOOL)animated
 {
     /*
     for (int i = 0; i < 3; i++) {
         BMKPointAnnotation* annotation = [[BMKPointAnnotation alloc]init];
         CLLocationCoordinate2D coor;
         coor.latitude = 39.915 + i*2;
         coor.longitude = 116.404 + i*2;
         annotation.coordinate = coor;
         annotation.title = @"这里是北京";
         [myMapView addAnnotation:annotation];
     }
     */
     BMKPointAnnotation* annotation = [[BMKPointAnnotation alloc]init];
     CLLocationCoordinate2D coor;
     coor.latitude = 39.915;
     coor.longitude = 116.404;
     annotation.coordinate = coor;
     annotation.title = @"这里是北京";
     annotation.subtitle = @"";
     //[myMapView addAnnotation:annotation];

     BMKPointAnnotation* annotation1 = [[BMKPointAnnotation alloc]init];
     CLLocationCoordinate2D coor1;
     coor1.latitude = 38.915;
     coor1.longitude = 113.404 + ;
     annotation1.coordinate = coor1;
     annotation1.title = @"这里也是北京";
     annotation1.subtitle = @"";
     //[myMapView addAnnotation:annotation1];

     BMKPointAnnotation* annotation2 = [[BMKPointAnnotation alloc]init];
     CLLocationCoordinate2D coor2;
     coor2.latitude = 38.915;
     coor2.longitude = 119.404 + ;
     annotation2.coordinate = coor2;
     annotation2.title = @"这里同样是北京";
     annotation2.subtitle = @"";
     //[myMapView addAnnotation:annotation2];

     NSArray *arr = [NSArray arrayWithObjects:annotation,annotation1,annotation2, nil];
     [myMapView addAnnotations:arr];
 }

 -(BMKAnnotationView *)mapView:(BMKMapView *)mapView viewForAnnotation:(id<BMKAnnotation>)annotation
 {
     if ([annotation isKindOfClass:[BMKPointAnnotation class]])
     {
         BMKPinAnnotationView *newAnnotationView = (BMKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"AnnotationView"];
         newAnnotationView = [[BMKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"AnnotationView"];
         newAnnotationView.pinColor = BMKPinAnnotationColorPurple;
         newAnnotationView.animatesDrop = YES;// 设置该标注点动画显示
         return newAnnotationView;
     }
     return nil;
 }

系统标记

如何自定义大头针

自定义大头针就是改变大头针的样式，如你想使用自己的图片代替上面显示的样式，代码实现跟上面的代码基本一样。只是在上面代理实现的代码中加入下面的代码即可。

  newAnnotationView.image = [UIImage imageNamed:@""]; （图片显示的大小，可以通过newAnnotationView的frame设定）

 

如何修改气泡样式

在气泡上默认是可以显示两行信息，一个title，一个subtitle，在此仅修改气泡的样式，如边框大小，字体，等基本信息，没有改变总体布局。

 

 -(BMKAnnotationView *)mapView:(BMKMapView *)mapView viewForAnnotation:(id<BMKAnnotation>)annotation
 {
     if ([annotation isKindOfClass:[BMKPointAnnotation class]])
     {
         BMKPinAnnotationView *newAnnotationView = (BMKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"AnnotationView"];
         newAnnotationView = [[BMKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"AnnotationView"];
         newAnnotationView.pinColor = BMKPinAnnotationColorPurple;
         newAnnotationView.animatesDrop = YES;// 设置该标注点动画显示

         UIView *view = [[UIView alloc]init];
         view.frame = CGRectMake(, , , );
         view.backgroundColor = [UIColor greenColor];
         [view.layer setMasksToBounds:YES];
         [view.layer setCornerRadius:];
         view.alpha = 0.9;

         UILabel *label1 = [[UILabel alloc]init];
         label1.frame = CGRectMake(, , , );
         label1.text = annotation.title;
         label1.numberOfLines = ;
         label1.font = [UIFont systemFontOfSize:];
         label1.textColor = [UIColor blackColor];
         [view addSubview:label1];

         UILabel *label2 = [[UILabel alloc]init];
         label2.frame = CGRectMake(, , , );
         label2.text = annotation.subtitle;
         label2.numberOfLines = ;
         label2.font = [UIFont systemFontOfSize:];
         label2.textColor = [UIColor lightGrayColor];
         [view addSubview:label2];

         BMKActionPaopaoView *pView = [[BMKActionPaopaoView alloc]initWithCustomView:view];
         pView.frame = CGRectMake(, , , );
         ((BMKPinAnnotationView *)newAnnotationView).paopaoView = pView;
         return newAnnotationView;
     }
     return nil;
 }

简单定义气泡样式

如果我们想要修改气泡的布局怎样处理呢？

因为系统默认的一个是坐标，一个标题，一个子标题，我们想要按照自己的方式布局弹出的气泡，我们需要做什么工作呢?

首先系统提供BMKPointAnnotation的方法不够我们使用,我们需要继承这个类，假如新类为myPoint,添加一些新的属性。比如这个类,我们需要添加三个属性。

分别是NSString *imgName ; NSString *placeName; NSString *idNum;

接下来我们我们需要自定义气泡，气泡本身是一个UIView,我们可以在继承于UIView,创建一个子类myPaopao;在myPaopao里面要添加三个控件，显示上面定义的三个属性。

 #import <UIKit/UIKit.h>

 @interface myPaopao : UIView
 @property(nonatomic,retain)UIImageView *imgView;
 @property(nonatomic,retain) UILabel *placeName;
 @property(nonatomic,retain) UILabel *idNum;

 @end

myPaopao.h

 #import "myPaopao.h"

 @implementation myPaopao

 -(instancetype)initWithFrame:(CGRect)frame
 {
     self = [super initWithFrame:frame];
     if (self)
     {
         self.frame = CGRectMake(, , , );
         self.backgroundColor = [UIColor whiteColor];

         _imgView = [[UIImageView alloc]init];
         _imgView.frame = CGRectMake(, , , );
         [self addSubview:_imgView];

         _placeName = [[UILabel alloc]init];
         _placeName.frame = CGRectMake(, , , );
         _placeName.font = [UIFont systemFontOfSize:];
         [self addSubview:_placeName];

         _idNum = [[UILabel alloc]init];
         _idNum.frame = CGRectMake(, , , );
         [self addSubview:_idNum];

     }
     return self;
 }
 @end

myPaopao.m

 //添加标记
 -(void)viewDidAppear:(BOOL)animated
 {
     myPoint* annotation = [[myPoint alloc]init];
     CLLocationCoordinate2D coor;
     coor.latitude = 39.915;
     coor.longitude = 116.404;
     annotation.coordinate = coor;
     annotation.imgName = @"1.jpg";
     annotation.placeName = @"这里是北京";
     annotation.idNum = @"";
     [myMapView addAnnotation:annotation];

     myPoint* annotation1 = [[myPoint alloc]init];
     CLLocationCoordinate2D coor1;
     coor1.latitude = 38.915;
     coor1.longitude = 113.404 + ;
     annotation1.coordinate = coor1;
     annotation1.imgName = @"2.jpg";
     annotation1.placeName = @"这里也是北京";
     annotation1.idNum = @"";
     [myMapView addAnnotation:annotation1];

 }
 -(BMKAnnotationView *)mapView:(BMKMapView *)mapView viewForAnnotation:(id<BMKAnnotation>)annotation
 {
     if ([annotation isKindOfClass:[myPoint class]])
     {
         myPoint *myAnnotation = (myPoint *)annotation;

         BMKPinAnnotationView *newAnnotationView = (BMKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"AnnotationView"];
         newAnnotationView = [[BMKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"AnnotationView"];
         newAnnotationView.pinColor = BMKPinAnnotationColorPurple;
         newAnnotationView.animatesDrop = YES;// 设置该标注点动画显示
         myPaopao *paopapo = [[myPaopao alloc]init];

         paopapo.imgView.image = [UIImage imageNamed:myAnnotation.imgName];
         paopapo.placeName.text = myAnnotation.placeName;
         paopapo.idNum.text = myAnnotation.idNum;
         BMKActionPaopaoView *pView = [[BMKActionPaopaoView alloc]initWithCustomView:paopapo];
         ((BMKPinAnnotationView *)newAnnotationView).paopaoView = pView;
         return newAnnotationView;
     }
     return nil;
 }

实现代码

如果有需要，我们还可以添加一个按钮，跳转到详情界面，添加按钮的方法，与上面的方法相同，在此

点聚合功能

点聚合功能是v2.9.0新增加的一个功能，如果在一个区域有大量的点，会产生覆盖现象，点聚合功能可以实现将很多点聚合到一个点上，通过缩放比例，可以显示更多点或聚合点。我们在下载SDK的时候，会带有一个Demo,从Demo中我们可以找到相应的实现代码。在开发文档中给出了我们核心代码：

折线（从一位置到另一位置的线段）

 

 代码段：

 //添加标记
 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coors[] = {};
     coors[].latitude = 39.315;
     coors[].longitude = 116.304;
     coors[].latitude = 30.515;
     coors[].longitude = 116.504;
     BMKPolyline *polyline = [BMKPolyline polylineWithCoordinates:coors count:];
     [myMapView addOverlay:polyline];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     NSLog(@"sdf");
     if ([overlay isKindOfClass:[BMKPolyline class]])
     {
         BMKPolylineView *polylineView = [[BMKPolylineView alloc]initWithPolyline:overlay];
         polylineView.strokeColor = [[UIColor greenColor]colorWithAlphaComponent:];
         polylineView.lineWidth = 5.0;
         return polylineView;
     }
     return nil;
 }

折线

分段纹理分段折线

代码段：

 //添加标记
 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coords[] = {};
     coords[].latitude = 39.965;
     coords[].longitude = 116.404;
     coords[].latitude = 39.925;
     coords[].longitude = 116.454;
     coords[].latitude = 39.955;
     coords[].longitude = 116.494;
     coords[].latitude = 39.905;
     coords[].longitude = 116.654;
     coords[].latitude = 39.965;
     coords[].longitude = 116.704;
     //构建分段文理索引数组
     NSArray *textureIndex = [NSArray arrayWithObjects:
                              [NSNumber numberWithInt:],
                              [NSNumber numberWithInt:],
                              [NSNumber numberWithInt:],
                              [NSNumber numberWithInt:], nil];
     BMKPolyline *polyline = [BMKPolyline polylineWithCoordinates:coords count: textureIndex:textureIndex];
     [myMapView addOverlay:polyline];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKPolyline class]])
     {
         BMKPolylineView* polylineView = [[BMKPolylineView alloc] initWithOverlay:overlay];
         polylineView.lineWidth = ;
         polylineView.isFocus = YES;// 是否分段纹理绘制（突出显示），默认YES
         //加载分段纹理图片，必须否则不能进行分段纹理绘制
         [polylineView loadStrokeTextureImages:
         [NSArray arrayWithObjects:[UIImage imageNamed:@"1.jpg"],
           [UIImage imageNamed:@"2.jpg"],
           [UIImage imageNamed:@"3.jpg"],nil]];
         return polylineView;
     }
     return nil;
 }

纹理折线

分段颜色分段折线

代码段：

 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coords[] = {};
     coords[].latitude = 39.965;
     coords[].longitude = 116.404;
     coords[].latitude = 39.925;
     coords[].longitude = 116.454;
     coords[].latitude = 39.955;
     coords[].longitude = 116.494;
     coords[].latitude = 39.905;
     coords[].longitude = 116.654;
     coords[].latitude = 39.965;
     coords[].longitude = 116.704;
     //构建分段文理索引数组
     NSArray *colorIndexs = [NSArray arrayWithObjects:
                              [NSNumber numberWithInt:],
                              [NSNumber numberWithInt:],
                              [NSNumber numberWithInt:],
                              [NSNumber numberWithInt:], nil];
     BMKPolyline *polyline = [BMKPolyline polylineWithCoordinates:coords count: textureIndex:colorIndexs];
     [myMapView addOverlay:polyline];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKPolyline class]])
     {
         BMKPolylineView* polylineView = [[BMKPolylineView alloc] initWithOverlay:overlay];
         polylineView.lineWidth = ;
         // 使用分段颜色绘制时，必须设置（内容必须为UIColor）
         polylineView.colors = [NSArray arrayWithObjects:[UIColor greenColor], [UIColor redColor], [UIColor yellowColor], nil];
         return polylineView;
     }
     return nil;
 }

颜色分段

弧线（起点，途经点，终点）

代码段：

 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coords[] = {};
     coords[].latitude = 39.9374;
     coords[].longitude = 116.350;
     coords[].latitude = 39.9170;
     coords[].longitude = 116.360;
     coords[].latitude = 39.9479;
     coords[].longitude = 116.373;
     BMKArcline *arcline = [BMKArcline arclineWithCoordinates:coords];
     [myMapView addOverlay:arcline];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKArcline class]])
     {
         NSLog(@"adf");
         BMKArclineView* arclineView = [[BMKArclineView alloc] initWithOverlay:overlay];
         arclineView.strokeColor = [[UIColor blackColor]colorWithAlphaComponent:0.5];
         arclineView.lineWidth = 5.0;
         return arclineView;
     }
     return nil;
 }

弧线

多边形

代码段：

 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coords[] = {};
     coords[].latitude = ;
     coords[].longitude = ;
     coords[].latitude = ;
     coords[].longitude = ;
     coords[].latitude = ;
     coords[].longitude = ;
     BMKPolygon *ploygon = [BMKPolygon polygonWithCoordinates:coords count:];
     [myMapView addOverlay:ploygon];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKPolygon class]])
     {
         BMKPolygonView* polygonView = [[BMKPolygonView alloc] initWithOverlay:overlay];
         polygonView.strokeColor = [[UIColor purpleColor] colorWithAlphaComponent:];
         polygonView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:0.2];
         polygonView.lineWidth = 5.0;

         return polygonView;
     }
     return nil;
 }

多边形

圆

代码段：

 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coor;
     coor.latitude = 39.915;
     coor.longitude = 116.404;
     BMKCircle* circle = [BMKCircle circleWithCenterCoordinate:coor radius:];
     [myMapView addOverlay:circle];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKCircle class]])
     {
         BMKCircleView* circleView = [[BMKCircleView alloc] initWithOverlay:overlay];
         circleView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:0.5];
         circleView.strokeColor = [[UIColor orangeColor] colorWithAlphaComponent:0.5];
         circleView.lineWidth = 10.0;

         return circleView;
     }
     return nil;
 }

圆

图片图层

第一种方法根据坐标，缩放尺度确定

代码段：

  -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coors;
     coors.latitude = 39.800;
     coors.longitude = 116.404;
     BMKGroundOverlay* ground = [BMKGroundOverlay groundOverlayWithPosition:coors
                                                                  zoomLevel: anchor:CGPointMake(0.0f,0.0f)
                                                                     icon:[UIImage imageNamed:@"1.jpg"]];
     [myMapView addOverlay:ground];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKGroundOverlay class]]){
         BMKGroundOverlayView* groundView = [[BMKGroundOverlayView alloc] initWithOverlay:overlay];
         return groundView;
     }
     return nil;
 }

图片图层一

第二种方法根据指定区域生成

代码段：

 -(void)viewDidAppear:(BOOL)animated
 {
     CLLocationCoordinate2D coords[] = {};
     coords[].latitude = 39.815;
     coords[].longitude = 116.404;
     coords[].latitude = 39.915;
     coords[].longitude = 116.504;
     BMKCoordinateBounds bound;
     bound.southWest = coords[];
     bound.northEast = coords[];
     BMKGroundOverlay* ground = [BMKGroundOverlay groundOverlayWithBounds: bound
                                                                      icon:[UIImage imageNamed:@"2.jpg"]];
     [myMapView addOverlay:ground];
 }
 -(BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id<BMKOverlay>)overlay
 {
     if ([overlay isKindOfClass:[BMKGroundOverlay class]]){
         BMKGroundOverlayView* groundView = [[BMKGroundOverlayView alloc] initWithOverlay:overlay];
         return groundView;
     }
     return nil;
 }

图片图层二