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
一.准备工作
1.首先去高德地图官网下载相关的sdk（如下图）：
2.按照高德地图官网的步骤继续添加所需要的依赖库
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：
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#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：
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- (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]; } |
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// 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：
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- (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）：
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- (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：
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- (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。
github地址:https://github.com/xuzzzzzzzz/xclocation
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://www.jianshu.com/p/c0ba4a06cdb8
