最近項(xiàng)目中要寫(xiě)一個(gè)微信那種發(fā)送位置的功能。具體功能在于：
- 定位到當(dāng)前位置
- 可定位當(dāng)前位置附近的Poi
- 可自行搜索目標(biāo)位置，并展示附近的poi
- 選擇當(dāng)前位置或者選擇目標(biāo)位置進(jìn)行發(fā)送
IMG_8283.GIF
一.準(zhǔn)備工作
1.首先去高德地圖官網(wǎng)下載相關(guān)的SDK（如下圖）：
image.png
2.按照高德地圖官網(wǎng)的步驟繼續(xù)添加所需要的依賴庫(kù)
image.png
3.根據(jù)項(xiàng)目的bundleID前往高德地圖API中創(chuàng)建引用并申請(qǐng)相關(guān)的key
到這一步前期的準(zhǔn)備工作基本差不多了，當(dāng)然，我這寫(xiě)的不是很具體，詳細(xì)的引入高德地圖SDK還需要
耐心按照高德地圖官網(wǎng)SDK一步步的去操作
二.代碼部分
1.初始化高德地圖SDK
在AppleDelegate中引入相關(guān)頭文件，從高德地圖應(yīng)用管理中找到該應(yīng)用對(duì)用的key值，進(jìn)行高德地圖SDK的初始化操作。直接貼代碼部分：
#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.定位到用戶當(dāng)前位置
在你需要定位的類中引入與地圖相關(guān)的頭文件
初始化地圖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];
//單次定位超時(shí)時(shí)間
[self.locationManager setLocationTimeout:6];
[self.locationManager setReGeocodeTimeout:3];
}
開(kāi)啟定位操作：
- (void)locateAction {
[self showHudInView:self.view hint:@"正在定位..."];
//帶逆地理的單次定位
[self.locationManager requestLocationWithReGeocode:YES completionBlock:^(CLLocation *location, AMapLocationReGeocode *regeocode, NSError *error) {
if (error) {
[self showHint:@"定位錯(cuò)誤" 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頭針到當(dāng)前位置（如果一直不顯示大頭針，檢查一下自己是否導(dǎo)入了高德地圖的資源文件）：
- (void)showMapPoint{
[_mapView setZoomLevel:15.1 animated:YES];
[_mapView setCenterCoordinate:self.currentLocationCoordinate animated:YES];
}
- (void)setCenterPoint{
MAPointAnnotation * centerAnnotation = [[MAPointAnnotation alloc] init];//初始化注解對(duì)象
centerAnnotation.coordinate = self.currentLocationCoordinate;//定位經(jīng)緯度
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; //設(shè)置氣泡可以彈出，默認(rèn)為NO
annotationView.animatesDrop = YES; //設(shè)置標(biāo)注動(dòng)畫(huà)顯示，默認(rèn)為NO
annotationView.draggable = YES; //設(shè)置標(biāo)注可以拖動(dòng)，默認(rèn)為NO
annotationView.pinColor = MAPinAnnotationColorRed;
return annotationView;
}
return nil;
}
地圖的代理方法等：
- (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];
//主動(dòng)選擇地圖上的地點(diǎn)
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;
}
包括主動(dòng)選擇地圖上的點(diǎn)然后進(jìn)行附近的搜索，可自定義搜索的內(nèi)容，定位成功之后用戶可以獲取到
當(dāng)前的經(jīng)緯度地址等一系列信息。詳細(xì)的代碼有點(diǎn)多就不一一貼出來(lái)了，需要的同學(xué)可以點(diǎn)擊下面的
github地址去下載體驗(yàn)。
