• iOS学习之Map,定位,标记位置的使用


    iOS上使用地图比Android要方便,只需要新建一个MKMapView,addSubView即可。这次要实现的效果如下:

    有标注(大头针),定位,地图。

    1、添加地图

    1.1 新一个Single View app ,选择默认项,创建后,在ViewController.h 

    #import <UIKit/UIKit.h>
    #import <MapKit/MapKit.h>
    #import <CoreLocation/CoreLocation.h>
    
    @interface ViewController : UIViewController 
    <MKMapViewDelegate, CLLocationManagerDelegate> {
        MKMapView *map;
        CLLocationManager *locationManager;
    }
    @end

    1.2在ViewController.m中添加

    - (void)viewDidLoad
    {
        map = [[MKMapView alloc] initWithFrame:[self.view bounds]];
        map.showsUserLocation = YES;
        map.mapType = MKMapTypeSatellite;
        [self.view addSubview:map];
    
    
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
    }

    运行:

    OMG,看到的是世界地图。怎么定位到指定的位置呢?比如定位回来伟大的祖国首都?

    这里map.mapType =MKMapTypeSatellite;我用到是卫星地图,可以使用标准的地图,

    map.mapType =MKMapTypeStandard;


    注意,如果此时你编译有错误,请拉到博客最后查看 :5、 遇到的问题

    2、定位到指定经纬度

    CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(39.915352,116.397105);
        
        float zoomLevel = 0.02;
        MKCoordinateRegion region = MKCoordinateRegionMake(coords, MKCoordinateSpanMake(zoomLevel, zoomLevel));
        [map setRegion:[map regionThatFits:region] animated:YES];
            

    这样,就我们就定位的了故宫了。

    3、添加标注大头针

    3.1 新建一个标注类:CustomAnnotation

    按Command+N,继承NSObject。在CustomAnnotation.h 和CustomAnnotation.m文件添加如下代码:

    #import <Foundation/Foundation.h>
    #import <MapKit/MapKit.h>
    
    @interface CustomAnnotation : NSObject 
    <MKAnnotation>
    {
        CLLocationCoordinate2D coordinate;
        NSString *title;
        NSString *subtitle;
    }
    -(id) initWithCoordinate:(CLLocationCoordinate2D) coords;
    
    @property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
    @property (nonatomic, retain) NSString *title;
    @property (nonatomic, retain) NSString *subtitle;
    
    @end

    3.1 使用大头针,

    新建个方法添加大头针的

    -(void)createAnnotationWithCoords:(CLLocationCoordinate2D) coords {
        CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithCoordinate: 
                                        coords];
        annotation.title = @"标题";
        annotation.subtitle = @"子标题";
        [map addAnnotation:annotation];
    }

    调用

    CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(39.915352,116.397105);
        
        float zoomLevel = 0.02;
        MKCoordinateRegion region = MKCoordinateRegionMake(coords, MKCoordinateSpanMake(zoomLevel, zoomLevel));
        [map setRegion:[map regionThatFits:region] animated:YES];
    
        
        [self createAnnotationWithCoords:coords];

    这样我们就把大头针定位在故宫了



    4、定位到当前位置并获取当前经纬度

    前面我们已经添加了locationManager,现在在DidViewLoad里直接调用

    locationManager = [[CLLocationManager alloc] init];
        locationManager.delegate = self;
        [locationManager startUpdatingLocation];

    实现协议方法收到定位成功后的经纬度

    - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
        [locationManager stopUpdatingLocation];
        
        NSString *strLat = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.latitude];
        NSString *strLng = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.longitude];
        NSLog(@"Lat: %@  Lng: %@", strLat, strLng);
    
    }
    
    - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
        NSLog(@"locError:%@", error);
    
    }

    运行,允许获取当前位置,打印log

    2012-06-28 23:58:32.237 MapDemo[8202:11603] Lat: 39.9011  Lng: 116.3000

    如果不允许:打印出错误日志

    2012-06-28 23:25:03.109 MapDemo[7531:11603] locError:Error Domain=kCLErrorDomain Code=1 "The operation couldn’t be completed. (kCLErrorDomain error 1.)"

    定位后,移动到当前位置:

    - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
        [locationManager stopUpdatingLocation];
        
        NSString *strLat = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.latitude];
        NSString *strLng = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.longitude];
        NSLog(@"Lat: %@  Lng: %@", strLat, strLng);
        
        CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(newLocation.coordinate.latitude,newLocation.coordinate.longitude);
        float zoomLevel = 0.02;
        MKCoordinateRegion region = MKCoordinateRegionMake(coords,MKCoordinateSpanMake(zoomLevel, zoomLevel));
        [map setRegion:[map regionThatFits:region] animated:YES];
    }


    定位到了当前位置。

    5、会遇到的问题:

    运行是发现了编译错误:

    Undefined symbols for architecture i386:

      "_CLLocationCoordinate2DMake", referenced from:

          -[ViewController viewDidLoad] in ViewController.o

          -[ViewController locationManager:didUpdateToLocation:fromLocation:] in ViewController.o

      "_OBJC_CLASS_$_MKMapView", referenced from:

          objc-class-ref in ViewController.o

      "_OBJC_CLASS_$_CLLocationManager", referenced from:

          objc-class-ref in ViewController.o

    ld: symbol(s) not found for architecture i386

    clang: error: linker command failed with exit code 1 (use -v to see invocation)

    这是为什么呢?没有添加对应的FrameWork。我使用的是4.3.2版本的XCode,添加方法如下:

    选择项目,TARGETS ,点加号,添加两个framework

    就好了。

    如何发送IOS模拟器经纬度?

    5.0以上的模拟器才能用这个功能,打开模拟:

    这样就能发送模拟的当前位置了。

    例子代码:http://download.csdn.net/detail/totogo2010/4400001点击打开链接

    https://github.com/schelling/YcDemo/tree/master/MapDemo

    著作权声明:本文由http://blog.csdn.net/totogo2010/原创,欢迎转载分享。请尊重作者劳动,转载时保留该声明和作者博客链接,谢谢!

     

  • 相关阅读:
    Android文件操作总结
    SQLite优化方法
    Android之TabHost布局
    Android简单数据存储SharedPreferences
    Android之SharedPreferences权限
    Android布局大全
    context理解
    Android网络连接之HttpURLConnection和HttpClient
    Android之ContentProvider总结
    Intent的简介以及属性详解
  • 原文地址:https://www.cnblogs.com/likun123/p/3958608.html
Copyright © 2020-2023  润新知