iOS學習之Map,定位，標記位置的使用

時間 2019-11-08

標籤 ios 學習 map 定位標記位置使用欄目 iOS 简体版

原文原文鏈接

iOS上使用地圖比Android要方便，只須要新建一個MKMapView,addSubView便可。此次要實現的效果以下：git

有標註（大頭針），定位，地圖。github

一、添加地圖

1.1 新一個Single View app ，選擇默認項，建立後，在ViewController.h app

[cpp] view plain copyatom

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

1.2在ViewController.m中添加

[cpp] view plain copy

- (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.
}

運行：

OMG,看到的是世界地圖。怎麼定位到指定的位置呢？好比定位回來偉大的祖國首都？

這裏map.mapType =MKMapTypeSatellite;我用到是衛星地圖，可使用標準的地圖，

map.mapType =MKMapTypeStandard;

注意，若是此時你編譯有錯誤，請拉到博客最後查看：五、遇到的問題

二、定位到指定經緯度

[cpp] view plain copy

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];

這樣，就咱們就定位的了故宮了。

三、添加標註大頭針

3.1 新建一個標註類：CustomAnnotation

按Command+N，繼承NSObject。在CustomAnnotation.h 和CustomAnnotation.m文件添加以下代碼：

[cpp] view plain copy

#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

[cpp] view plain copy

#import "CustomAnnotation.h"
@implementation CustomAnnotation
@synthesize coordinate, title, subtitle;
-(id) initWithCoordinate:(CLLocationCoordinate2D) coords
{
if (self = [super init]) {
coordinate = coords;
}
return self;
}
@end

3.1 使用大頭針，

新建個方法添加大頭針的

[cpp] view plain copy

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

調用

[cpp] view plain copy

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];

這樣咱們就把大頭針定位在故宮了

四、定位到當前位置並獲取當前經緯度

前面咱們已經添加了locationManager，如今在DidViewLoad裏直接調用

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

實現協議方法收到定位成功後的經緯度

[cpp] view plain copy

- (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);
}

運行，容許獲取當前位置，打印log

[cpp] view plain copy

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

若是不容許：打印出錯誤日誌

[cpp] view plain copy

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.)"

定位後，移動到當前位置：

[cpp] view plain copy

- (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];
}