- 上一篇：百度地图集成--定位
前言：在上一篇中介绍了百度地图
sdk的加入，以及定位功能的实现，在本篇将要介绍如何在地图上绘制线,效果如图所示
直接上代码
//
// PolylineController.m
// 地图
//
// Created by apple on 2018/4/2.
// Copyright © 2018年 zj. All rights reserved.
//
#import "PolylineController.h"
@interface PolylineController ()<BMKMapViewDelegate,BMKRouteSearchDelegate>
{
BMKMapView* _mapView;
BMKRouteSearch *_routeSearch;
}
@end
@implementation PolylineController
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
_mapView.delegate = self;
}
-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
_mapView.delegate = nil; // 不用时，置nil
}
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
self.title = @"绘制线";
// 设置地图
[self setupBMKLocation];
}
- (void)setupBMKLocation {
_mapView = [[BMKMapView alloc]init];
_mapView.frame = self.view.bounds;
_mapView.delegate = self;
[_mapView setZoomLevel:12.0];
[self.view addSubview:_mapView];
//==================拿到经纬度绘制线=================
// 添加折线覆盖物
CLLocationCoordinate2D coor[4] = {0};
coor[0].latitude = 39.832136;
coor[0].longitude = 116.34095;
coor[1].latitude = 39.832136;
coor[1].longitude = 116.42095;
coor[2].latitude = 39.902136;
coor[2].longitude = 116.42095;
coor[3].latitude = 39.902136;
coor[3].longitude = 116.44095;
//绘制折线
BMKPolyline* polyline = [BMKPolyline polylineWithCoordinates:coor count:4];
[_mapView addOverlay:polyline];
//插大头针
BMKPointAnnotation *pointAnnotation = [[BMKPointAnnotation alloc] init];
pointAnnotation.coordinate = coor[0];
pointAnnotation.title = @"我的位置";// 要显示的标题；注意：如果不设置title,无法点击annotation,也无法使用回调函数
[_mapView addAnnotation:pointAnnotation];
BMKPointAnnotation *pointAnnotation1 = [[BMKPointAnnotation alloc] init];
pointAnnotation1.coordinate = coor[3];
pointAnnotation1.title = @"骑手位置";// 要显示的标题；注意：如果不设置title,无法点击annotation,也无法使用回调函数
[_mapView addAnnotation:pointAnnotation1];
BMKPointAnnotation *pointAnnotation2 = [[BMKPointAnnotation alloc] init];
pointAnnotation2.coordinate = coor[2];
pointAnnotation2.title = @"商家位置";// 要显示的标题；注意：如果不设置title,无法点击annotation,也无法使用回调函数
[_mapView addAnnotation:pointAnnotation2];
}
/**
*根据overlay生成对应的View
*@param mapView 地图View
*@param overlay 指定的overlay
*@return 生成的覆盖物View
*/
- (BMKOverlayView *)mapView:(BMKMapView *)mapView viewForOverlay:(id <BMKOverlay>)overlay{
if ([overlay isKindOfClass:[BMKPolyline class]]){
BMKPolylineView* polylineView = [[BMKPolylineView alloc] initWithOverlay:overlay];
polylineView.strokeColor = [UIColor redColor];
polylineView.lineWidth = 2.0;
return polylineView;
}
return nil;
}
#pragma mark - BMKLocationServiceDelegate 实现相关delegate 处理位置信息更新
/**
*在地图View将要启动定位时，会调用此函数
*@param mapView 地图View
*/
- (void)willStartLocatingUser
{
NSLog(@"start locate");
}
/**
*用户方向更新后，会调用此函数
*@param userLocation 新的用户位置
*/
- (void)didUpdateUserHeading:(BMKUserLocation *)userLocation
{
NSLog(@"heading is %@",userLocation.heading);
}
/**
*用户位置更新后，会调用此函数
*@param userLocation 新的用户位置
*/
- (void)didUpdateBMKUserLocation:(BMKUserLocation *)userLocation
{
NSLog(@"didUpdateUserLocation lat %f,long %f", userLocation.location.coordinate.latitude, userLocation.location.coordinate.longitude);
BMKCoordinateRegion region;
region.center.latitude = userLocation.location.coordinate.latitude;
region.center.longitude = userLocation.location.coordinate.longitude;
region.span.latitudeDelta = 0.2;
region.span.longitudeDelta = 0.2;
if (_mapView)
{
_mapView.region = region;
}
[_mapView setZoomLevel:19.0];
//添加当前位置的标注
CLLocationCoordinate2D coord;
coord.latitude = userLocation.location.coordinate.latitude;
coord.longitude = userLocation.location.coordinate.longitude;
BMKPointAnnotation *_pointAnnotation = [[BMKPointAnnotation alloc] init];
_pointAnnotation.coordinate = coord;
_pointAnnotation.title = @"我的位置";// 要显示的标题；注意：如果不设置title,无法点击annotation,也无法使用回调函数
dispatch_async(dispatch_get_main_queue(), ^{
[_mapView removeOverlays:_mapView.overlays];
[_mapView setCenterCoordinate:coord animated:true];
[_mapView addAnnotation:_pointAnnotation];
// [_mapView selectAnnotation:_pointAnnotation animated:NO]; 默认选中大头针
});
}
//设置标注样式
-(BMKAnnotationView *)mapView:(BMKMapView *)mapView viewForAnnotation:(id<BMKAnnotation>)annotation{
//大头针系统样式
if ([annotation isKindOfClass:[BMKPointAnnotation class]]) {
static NSString *pointReuseIndentifier = @"pointReuseIndentifier";
BMKPinAnnotationView*annotationView = (BMKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:pointReuseIndentifier];
if (annotationView == nil) {
annotationView = [[BMKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:pointReuseIndentifier];
}
annotationView.pinColor = BMKPinAnnotationColorPurple;
annotationView.canShowCallout= YES; //设置气泡可以弹出，默认为NO
annotationView.animatesDrop=YES; //设置标注动画显示，默认为NO
annotationView.draggable = YES; //设置标注可以拖动，默认为NO
return annotationView;
}
return nil;
}
/**
*在地图View停止定位后，会调用此函数
*
*/
- (void)didStopLocatingUser
{
NSLog(@"stop locate");
}
/**
*定位失败后，会调用此函数
*
*@param error 错误号，参考CLError.h中定义的错误号
*/
- (void)didFailToLocateUserWithError:(NSError *)error
{
NSLog(@"location error");
// NSString *city = [[NSUserDefaults standardUserDefaults] objectForKey:@"cityNmae"];
// [self.cityBtn setTitle:city forState:UIControlStateNormal];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
到此就结束了在地图上绘制线，后续会更新关于地图的别的功能，尽请期待.....
demo地址
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