最近项目中要写一个微信那种发送位置的功能。具体功能在于：
- 定位到当前位置
- 可定位当前位置附近的Poi
- 可自行搜索目标位置，并展示附近的poi
- 选择当前位置或者选择目标位置进行发送
IMG_8283.GIF
一.准备工作
1.首先去高德地图官网下载相关的SDK（如下图）：
image.png
2.按照高德地图官网的步骤继续添加所需要的依赖库
image.png
3.根据项目的bundleID前往高德地图API中创建引用并申请相关的key
到这一步前期的准备工作基本差不多了，当然，我这写的不是很具体，详细的引入高德地图SDK还需要
耐心按照高德地图官网SDK一步步的去操作
二.代码部分
1.初始化高德地图SDK
在AppleDelegate中引入相关头文件，从高德地图应用管理中找到该应用对用的key值，进行高德地图SDK的初始化操作。直接贴代码部分：
#import "AppDelegate.h"
#import "ViewController.h"
#import <AMapLocationKit/AMapLocationKit.h>
#import <AMapFoundationKit/AMapFoundationKit.h>
static NSString *APIKey = @"a1500980e29b7ca7612a46c19e0d2e3a";
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
[self.window makeKeyAndVisible];
self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[ViewController new]];
[AMapServices sharedServices].apiKey = APIKey;
return YES;
}
2.定位到用户当前位置
在你需要定位的类中引入与地图相关的头文件
初始化地图view：
- (void)initMapView{
self.mapView = [[MAMapView alloc] initWithFrame:CGRectMake(0, 64 + 44, SCREEN_WIDTH, 300)];
self.mapView.delegate = self;
self.mapView.mapType = MAMapTypeStandard;
self.mapView.showsScale = NO;
self.mapView.showsCompass = NO;
self.mapView.showsUserLocation = YES;
[self.view addSubview:self.mapView];
UIButton *localButton = [UIButton buttonWithType:UIButtonTypeCustom];
localButton.backgroundColor = [UIColor redColor];
localButton.frame = CGRectMake(SCREEN_WIDTH - 60, 240, 50, 50);
[localButton addTarget:self action:@selector(localButtonAction) forControlEvents:UIControlEventTouchUpInside];
localButton.layer.cornerRadius = 25;
localButton.clipsToBounds = YES;
[localButton setImage:[UIImage imageNamed:@"定位"] forState:UIControlStateNormal];
[self.mapView addSubview:localButton];
}
// 定位SDK
- (void)configLocationManager {
self.locationManager = [[AMapLocationManager alloc] init];
[self.locationManager setDelegate:self];
[self.locationManager setDesiredAccuracy:kCLLocationAccuracyHundredMeters];
//单次定位超时时间
[self.locationManager setLocationTimeout:6];
[self.locationManager setReGeocodeTimeout:3];
}
开启定位操作：
- (void)locateAction {
[self showHudInView:self.view hint:@"正在定位..."];
//带逆地理的单次定位
[self.locationManager requestLocationWithReGeocode:YES completionBlock:^(CLLocation *location, AMapLocationReGeocode *regeocode, NSError *error) {
if (error) {
[self showHint:@"定位错误" yOffset:-180];
NSLog(@"locError:{%ld - %@};",(long)error.code,error.localizedDescription);
if (error.code == AMapLocationErrorLocateFailed) {
return ;
}
}
//定位信息
NSLog(@"location:%@", location);
if (regeocode)
{
[self hideHud];
self.currentLocationCoordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude);
self.city = regeocode.city;
[self showMapPoint];
[self setCenterPoint];
self.request.location = [AMapGeoPoint locationWithLatitude:location.coordinate.latitude longitude:location.coordinate.longitude];
[self.mapSearch AMapPOIAroundSearch:self.request];
}
}];
}
定位成功之后展示大头针到当前位置（如果一直不显示大头针，检查一下自己是否导入了高德地图的资源文件）：
- (void)showMapPoint{
[_mapView setZoomLevel:15.1 animated:YES];
[_mapView setCenterCoordinate:self.currentLocationCoordinate animated:YES];
}
- (void)setCenterPoint{
MAPointAnnotation * centerAnnotation = [[MAPointAnnotation alloc] init];//初始化注解对象
centerAnnotation.coordinate = self.currentLocationCoordinate;//定位经纬度
centerAnnotation.title = @"";
centerAnnotation.subtitle = @"";
[self.mapView addAnnotation:centerAnnotation];//添加注解
}
#pragma mark - MAMapView Delegate
- (MAAnnotationView *)mapView:(MAMapView *)mapView
viewForAnnotation:(id<MAAnnotation>)annotation {
if ([annotation isKindOfClass:[MAPointAnnotation class]]) {
static NSString *pointReuseIndentifier = @"pointReuseIndentifier";
MAPinAnnotationView*annotationView = (MAPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:pointReuseIndentifier];
if (annotationView == nil)
{
annotationView = [[MAPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:pointReuseIndentifier];
}
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
annotationView.pinColor = MAPinAnnotationColorRed;
return annotationView;
}
return nil;
}
地图的代理方法等：
- (void)mapView:(MAMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
[self.mapView removeAnnotations:self.mapView.annotations];
CLLocationCoordinate2D centerCoordinate = mapView.region.center;
self.currentLocationCoordinate = centerCoordinate;
MAPointAnnotation * centerAnnotation = [[MAPointAnnotation alloc] init];
centerAnnotation.coordinate = centerCoordinate;
centerAnnotation.title = @"";
centerAnnotation.subtitle = @"";
[self.mapView addAnnotation:centerAnnotation];
//主动选择地图上的地点
if (!self.isSelectedAddress) {
[self.tableView setContentOffset:CGPointMake(0,0) animated:NO];
self.selectedIndexPath=[NSIndexPath indexPathForRow:0 inSection:0];
self.request.location = [AMapGeoPoint locationWithLatitude:centerCoordinate.latitude longitude:centerCoordinate.longitude];
self.currentPage = 1;
self.request.page = self.currentPage;
[self.mapSearch AMapPOIAroundSearch:self.request];
}
self.isSelectedAddress = NO;
}
包括主动选择地图上的点然后进行附近的搜索，可自定义搜索的内容，定位成功之后用户可以获取到
当前的经纬度地址等一系列信息。详细的代码有点多就不一一贴出来了，需要的同学可以点击下面的
github地址去下载体验。
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