位置与地图(一)定位获取位置及位置编码-反编码
*我们的应用程序,可以通过添加Core Location框架所包含的类,获取设备的地图位置.
*添加CoreLocation.framework框架,导入#import<CoreLocation/CoreLocation.h>
*使用地图服务时,会消耗更多地设备电量.因此,在获取到设备的位置后,应该停止定位来节省电量
@跟往常一样,我们通过一个demo来展示内容与效果
//
// HMTRootViewController.h
// My-GPS-Map
//
// Created by hmt on 14-4-12.
// Copyright (c) 2014年 胡明涛. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface HMTRootViewController : UIViewController <CLLocationManagerDelegate>
@end
//
// HMTRootViewController.m
// My-GPS-Map
//
// Created by hmt on 14-4-12.
// Copyright (c) 2014年 胡明涛. All rights reserved.
//
#import "HMTRootViewController.h"
#import <AddressBook/AddressBook.h>
@interface HMTRootViewController (){
CLLocationManager * _locationManage;
}
@property (nonatomic,retain) CLLocationManager * locationManage;
@end
@implementation HMTRootViewController
- (void)dealloc{
RELEASE_SAFELY(_locationManage);
[super dealloc];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self createGPSMap];
self.view.backgroundColor = [UIColor redColor];
}
- (void)createGPSMap{
// 初始化位置服务
self.locationManage = [[CLLocationManager alloc]init];
// 要求CLLocationManager对象返回全部信息
_locationManage.distanceFilter = kCLDistanceFilterNone;
// 设置定位精度
_locationManage.desiredAccuracy = kCLLocationAccuracyBest;
// 设置代理
_locationManage.delegate = self;
// 开始定位
[_locationManage startUpdatingLocation];
[_locationManage release];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
CLLocation * newLocation = [locations lastObject];
// 停止实时定位
[_locationManage stopUpdatingLocation];
// 取得经纬度
CLLocationCoordinate2D coord2D = newLocation.coordinate;
double latitude = coord2D.latitude;
double longitude = coord2D.longitude;
NSLog(@"纬度 = %f 经度 = %f",latitude,longitude);
// 取得精度
CLLocationAccuracy horizontal = newLocation.horizontalAccuracy;
CLLocationAccuracy vertical = newLocation.verticalAccuracy;
NSLog(@"水平方 = %f 垂直方 = %f",horizontal,vertical);
// 取得高度
CLLocationDistance altitude = newLocation.altitude;
NSLog(@"%f",altitude);
// 取得此时时刻
NSDate *timestamp = [newLocation timestamp];
// 实例化一个NSDateFormatter对象
NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init];
// 设定时间格式
[dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss a"];
[dateFormat setAMSymbol:@"AM"]; // 显示中文, 改成"上午"
[dateFormat setPMSymbol:@"PM"];
// 求出当天的时间字符串，当更改时间格式时，时间字符串也能随之改变
NSString *dateString = [dateFormat stringFromDate:timestamp];
NSLog(@"此时此刻时间 = %@",dateString);
// -----------------------------------------位置反编码--------------------------------------------
CLGeocoder * geocoder = [[CLGeocoder alloc]init];
[geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark * place in placemarks) {
NSLog(@"name = %@",place.name); // 位置名
NSLog(@"thoroughfare = %@",place.thoroughfare); // 街道
NSLog(@"subAdministrativeArea = %@",place.subAdministrativeArea); // 子街道
NSLog(@"locality = %@",place.locality); // 市
NSLog(@"subLocality = %@",place.subLocality); // 区
NSLog(@"country = %@",place.country); // 国家
NSArray *allKeys = place.addressDictionary.allKeys;
for (NSString *key in allKeys)
{
NSLog(@"key = %@, value = %@",key, place.addressDictionary[key]);
}
#pragma mark - 使用系统定义的字符串直接查询,记得导入AddressBook框架
NSLog(@"kABPersonAddressCityKey = %@", (NSString *)kABPersonAddressCityKey);
NSLog(@"city = %@", place.addressDictionary[(NSString *)kABPersonAddressCityKey]);
NSString *city = place.locality;
if(city == nil)
{
city = place.addressDictionary[(NSString *)kABPersonAddressStateKey];
}
}
}];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end@程序运行结果:(以39.3,116.4为例)
// 判断输入的地址
if (self.locationTextField.text == nil || [self.locationTextField.text length] == 0) {
return;
}
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
/* -----------------------------------------位置编码-------------------------------------------- */
[geocoder geocodeAddressString:_locationTextField.text completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark *placemark in placemarks) {
CLLocationCoordinate2D coordinate = placemark.location.coordinate;
NSString *strCoordinate = [NSString stringWithFormat:@"纬度 = %3.5f\n 经度 = %3.5f",coordinate.latitude,coordinate.longitude];
NSLog(@"%@",strCoordinate);
NSDictionary *addressDictionary = placemark.addressDictionary;
NSString *address = [addressDictionary objectForKey:(NSString *)kABPersonAddressStreetKey];
NSString *state = [addressDictionary objectForKey:(NSString *)kABPersonAddressStateKey];
NSString *city = [addressDictionary objectForKey:(NSString *)kABPersonAddressCityKey];
NSLog(@"街道 = %@\n 省 = %@\n 城市 = %@",address,state,city);
}
}];