iOS开发-苹果自带地图简单使用

【实现功能】：

1.展示简单地图

2.显示用户当前位置

3.控制视图大小

4.大头针点击显示信息

5.放置目的地大头针

6.当前位置与目的地连线

【实现步骤】

1.导入两个需要的框架：CoreLocation.framework和MapKit.framework

2.引入头文件：

#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>

3.需要两个类的变量，这里定义为属性：

@property (nonatomic, retain)MKMapView *mapView;
@property (nonatomic, retain)CLLocationManager *locaManager;

4.别忘了接受协议

@interface ViewController ()<CLLocationManagerDelegate,MKMapViewDelegate>

5.OK开始上代码

- (void)viewDidLoad{
    [super viewDidLoad];
    
    //初始化位置管理
    self.locaManager = [[CLLocationManager alloc] init];
    //如果设备在iOS8及以上，得先弹框让用户授权，才能获得定位权限
    if ([[UIDevice currentDevice].systemVersion doubleValue] >= 8.0) {
        [self.locaManager requestWhenInUseAuthorization];
    }
    //设置代理
    self.locaManager.delegate = self;
    //开始定位
    [self.locaManager startUpdatingLocation];
    
    
    //初始化地图视图
    self.mapView = [[MKMapView alloc] initWithFrame:self.view.frame];
    //设置地图样式为基本样式（这里有三种样式）
    self.mapView.mapType = MKMapTypeStandard;
    //是否显示当前位置
    self.mapView.showsUserLocation = YES;
    //设置代理
    self.mapView.delegate = self;
    [self.view addSubview:self.mapView];
}

代理方法的实现

#pragma mark -- mapViewDelegate

- (void)mapViewDidFinishLoadingMap:(MKMapView *)mapView{
    NSLog(@"加载完毕");
}
- (void)mapViewWillStartLocatingUser:(MKMapView *)mapView{
    NSLog(@"将要获取用户位置");
}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
    //点击大头针，出现信息
    userLocation.title = @"丁健";
    userLocation.subtitle = @"dingjianjaja";
    //让地图视图转移到用户当前位置
    [mapView setCenterCoordinate:userLocation.location.coordinate animated:YES];
    //设置精度，以及显示用户所在地
    MKCoordinateSpan span = MKCoordinateSpanMake(1, 1);//比例尺为1：10^5,1厘米代表1公里
    MKCoordinateRegion region = MKCoordinateRegionMake(userLocation.location.coordinate, span);
    [mapView setRegion:region animated:YES];
}

6.运行

发现不显示用户位置，原因是在iOS8以后程序使用定位有三种状态，即试用期间/始终/永不，所以我们需要在plist文件中配置：试用期间或者始终

NSLocationWhenInUseUsageDescription

---

简单的展示地图自己位置就完成了，下面会继续加入目的地大头针，以及连接当前位置与目的地，并计算直线距离的功能。

1.要想在地图上连接2个点，首先需要将两个点加入到一个数组中

起点:

CLLocationCoordinate2D coord1;
    coord1.latitude = userLocation.location.coordinate.latitude;
    coord1.longitude = userLocation.location.coordinate.longitude;

    coords[0] = coord1;

终点：

coords[1] = coord;

coords数组中有两个元素

下面开始画线链接

MKPolyline *line =  [MKPolyline polylineWithCoordinates:coords count:2];//执行画线方法;
    [self.mapView addOverlay: line];

还没完，最后要实现代理方法确定画线的样式

#pragma mark 地图两点画线代理方法
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
    if ([overlay isKindOfClass:[MKPolyline class]])
    {
        MKPolylineView *lineview=[[MKPolylineView alloc] initWithOverlay:overlay];
        lineview.strokeColor=[[UIColor blueColor] colorWithAlphaComponent:0.5];
        lineview.lineWidth=2.0;
        
        return lineview;
    }else{
        return nil;
    }
}

OK完成效果如图：

计算两点距离

//计算距离
    CLLocationDistance meters=[self.currentLocation distanceFromLocation:loc];

通过经纬度编码为地名

[_geocoder reverseGeocodeLocation:loc completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *placemark=[placemarks firstObject];
        NSString *str = [placemark.addressDictionary valueForKey:@"Name"];
        _destinationLocalLabel.text = [NSString stringWithFormat:@"目的地:%@",str];
    }];

---

完整代码：

//
//  ViewController.m
//  MapDemo
//
//  Created by dingjianjaja on 15/12/11.
//  Copyright © 2015年 dingjianjaja. All rights reserved.
//

#import "ViewController.h"
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@interface ViewController ()<CLLocationManagerDelegate,MKMapViewDelegate>
{
    CLLocationCoordinate2D coords[2];
}
@property (nonatomic, retain)MKMapView *mapView;
@property (nonatomic, retain)CLLocationManager *locaManager;

@property (nonatomic, retain)CLLocation *currentLocation;
/**
 *  放置大头针按钮
 */
@property (nonatomic, retain)UIButton *setPosationBtn;
/**
 *  经度输入框
 */
@property (nonatomic, retain)UITextField *longitudeText;
/**
 *  纬度输入框
 */
@property (nonatomic, retain)UITextField *latitudeText;
/**
 *  画线点的数组
 */
@property (nonatomic, retain)NSMutableArray *pointArr;
/**
 *  当前地点
 */
@property (nonatomic, retain)UILabel *currentLocalLabel;
/**
 *  目的地地点
 */
@property (nonatomic, retain)UILabel *destinationLocalLabel;
/**
 *  相距多远
 */
@property (nonatomic, retain)UILabel *distenceLabel;

@property (nonatomic, retain)CLGeocoder *geocoder;
@end

@implementation ViewController

- (NSArray *)pointArr{
    if (!_pointArr) {
        _pointArr = [NSMutableArray array];
    }
    return _pointArr;
}

- (void)viewDidLoad{
    [super viewDidLoad];
    
    //初始化位置管理
    self.locaManager = [[CLLocationManager alloc] init];
    //如果设备在iOS8及以上，得先弹框让用户授权，才能获得定位权限
    if ([[UIDevice currentDevice].systemVersion doubleValue] >= 8.0) {
        [self.locaManager requestWhenInUseAuthorization];
    }
    //设置代理
    self.locaManager.delegate = self;
    //开始定位
    [self.locaManager startUpdatingLocation];
    
    
    //初始化地图视图
    self.mapView = [[MKMapView alloc] initWithFrame:self.view.frame];
    //设置地图样式为基本样式（这里有三种样式）
    self.mapView.mapType = MKMapTypeStandard;
    //是否显示当前位置
    self.mapView.showsUserLocation = YES;
    //设置代理
    self.mapView.delegate = self;
    [self.view addSubview:self.mapView];
    
    //放置大头针按钮
    _setPosationBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    _setPosationBtn.frame = CGRectMake(10, 100, 100, 30);
    [_setPosationBtn setTitle:@"放置大头针" forState:UIControlStateNormal];
    _setPosationBtn.backgroundColor = [UIColor orangeColor];
    _setPosationBtn.alpha = 0.4;
    [_setPosationBtn addTarget:self action:@selector(setPositionBtnClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:_setPosationBtn];
    
    //经纬度文本框
    _longitudeText = [[UITextField alloc] initWithFrame:CGRectMake(10, 20, 100, 30)];
    _longitudeText.backgroundColor = [UIColor grayColor];
    _longitudeText.alpha = 0.5;
    [self.view addSubview:_longitudeText];
    
    _latitudeText = [[UITextField alloc] initWithFrame:CGRectMake(10, 60, 100, 30)];
    _latitudeText.backgroundColor = [UIColor grayColor];
    _latitudeText.alpha = 0.5;
    [self.view addSubview:_latitudeText];
    
    
    
    //当前地点
    _currentLocalLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(_longitudeText.frame) + 10, 20, 247, 30)];
    _currentLocalLabel.backgroundColor = [UIColor grayColor];
    _currentLocalLabel.text = @"当前地点:";
    _currentLocalLabel.font = [UIFont systemFontOfSize:12];
    [self.view addSubview:_currentLocalLabel];
    
    //目标地点
    _destinationLocalLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(_longitudeText.frame) + 10, 60, 247, 30)];
    _destinationLocalLabel.backgroundColor = [UIColor grayColor];
    _destinationLocalLabel.text = @"目标地点:";
    _destinationLocalLabel.font = [UIFont systemFontOfSize:12];
    [self.view addSubview:_destinationLocalLabel];
    
    //距离
    _distenceLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(_setPosationBtn.frame) + 10, 100, 247, 30)];
    _distenceLabel.backgroundColor = [UIColor grayColor];
    _distenceLabel.text = @"相距距离:";
    _distenceLabel.font = [UIFont systemFontOfSize:12];
    [self.view addSubview:_distenceLabel];
    
    _geocoder=[[CLGeocoder alloc]init];
    
}

#pragma mark 根据坐标取得地名
-(void)getAddressByLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude{
    //反地理编码
    CLLocation *location=[[CLLocation alloc]initWithLatitude:latitude longitude:longitude];
    [_geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *placemark=[placemarks firstObject];
        NSString *str = [placemark.addressDictionary valueForKey:@"Name"];
        NSLog(@"详细信息:%@",str);
    }];
}



- (void)setPositionBtnClick{
    NSLog(@"放置大头针");
    
    
    //创建CLLocation 设置经纬度
    CLLocation *loc = [[CLLocation alloc]initWithLatitude:[[self.latitudeText text] floatValue] longitude:[[self.longitudeText text] floatValue]];
    CLLocationCoordinate2D coord = [loc coordinate];
    //创建标题
    NSString *titile = [NSString stringWithFormat:@"%f,%f",coord.latitude,coord.longitude];
    MyPoint *myPoint = [[MyPoint alloc] initWithCoordinate:coord andTitle:titile];
    //添加标注
    [self.mapView addAnnotation:myPoint];
    
    //放大到标注的位置
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(coord, 80000, 80000);
    [self.mapView setRegion:region animated:YES];
    
    //声明一个数组  用来存放画线的点
    
    coords[1] = coord;
    MKPolyline *line =  [MKPolyline polylineWithCoordinates:coords count:2];//执行画线方法;
    [self.mapView addOverlay: line];
    
    
    //计算距离
    CLLocationDistance meters=[self.currentLocation distanceFromLocation:loc];
    _distenceLabel.text = [NSString stringWithFormat:@"相距距离:%.2f千米",meters/1000];
    
    [_geocoder reverseGeocodeLocation:loc completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *placemark=[placemarks firstObject];
        NSString *str = [placemark.addressDictionary valueForKey:@"Name"];
        _destinationLocalLabel.text = [NSString stringWithFormat:@"目的地:%@",str];
    }];

    
    
}

#pragma mark 地图两点画线代理方法
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
    if ([overlay isKindOfClass:[MKPolyline class]])
    {
        MKPolylineView *lineview=[[MKPolylineView alloc] initWithOverlay:overlay];
        lineview.strokeColor=[[UIColor blueColor] colorWithAlphaComponent:0.5];
        lineview.lineWidth=2.0;
        
        return lineview;
    }else{
        return nil;
    }
}



#pragma mark -- mapViewDelegate

- (void)mapViewDidFinishLoadingMap:(MKMapView *)mapView{
    NSLog(@"加载完毕");
}
- (void)mapViewWillStartLocatingUser:(MKMapView *)mapView{
    NSLog(@"将要获取用户位置");
}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
    //点击大头针，出现信息
    userLocation.title = @"丁健";
    
    self.currentLocation = [[CLLocation alloc] initWithLatitude:userLocation.location.coordinate.latitude longitude:userLocation.location.coordinate.longitude];
    NSLog(@"当前位置%@",self.currentLocation);
    
    
    //地理反编码
    [_geocoder reverseGeocodeLocation:self.currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *placemark=[placemarks firstObject];
        NSString *str = [placemark.addressDictionary valueForKey:@"Name"];
        _currentLocalLabel.text = [NSString stringWithFormat:@"当前地点:%@",str];
    }];
    
    
    //让地图视图转移到用户当前位置
    [mapView setCenterCoordinate:userLocation.location.coordinate animated:YES];
    
    CLLocationCoordinate2D coord1;
    coord1.latitude = userLocation.location.coordinate.latitude;
    coord1.longitude = userLocation.location.coordinate.longitude;

    coords[0] = coord1;
    //设置精度，以及显示用户所在地
    MKCoordinateSpan span = MKCoordinateSpanMake(1, 1);//比例尺为1：10^5,1厘米代表1公里
    MKCoordinateRegion region = MKCoordinateRegionMake(userLocation.location.coordinate, span);
    [mapView setRegion:region animated:YES];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end