使用MapKit框架
地图显示
最简单显示地图的代码:
//
// RootViewController.m
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "RootViewController.h"
#import <MapKit/MapKit.h>
@interface RootViewController ()
@end
@implementation RootViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// 初始化地图控件
MKMapView *mapView = [[MKMapView alloc] initWithFrame:self.view.bounds];
// 地图的类型
mapView.mapType = MKMapTypeStandard;
// 视图的宽度和高度将和父视图的宽度一起成比例变化
mapView.autoresizingMask = \
UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// 显示地图
[self.view addSubview:mapView];
}
@end
RootViewController注意:使用地图之前是需要引入MapKit框架的哦.
autoresizingMask是干什么用的呢(实际上,我看过后还是不懂)?
| UIViewAutoresizingNone |
这个常量如果被设置，视图将不进行自动尺寸调整。 |
| UIViewAutoresizingFlexibleHeight |
这个常量如果被设置，视图的高度将和父视图的高度一起成比例变化。否则，视图的高度将保持不变。 |
| UIViewAutoresizingFlexibleWidth |
这个常量如果被设置，视图的宽度将和父视图的宽度一起成比例变化。否则，视图的宽度将保持不变。 |
| UIViewAutoresizingFlexibleLeftMargin |
这个常量如果被设置，视图的左边界将随着父视图宽度的变化而按比例进行调整。否则，视图和其父视图的左边界的相对位置将保持不变。 |
| UIViewAutoresizingFlexibleRightMargin |
这个常量如果被设置，视图的右边界将随着父视图宽度的变化而按比例进行调整。否则，视图和其父视图的右边界的相对位置将保持不变。 |
| UIViewAutoresizingFlexibleBottomMargin |
这个常量如果被设置，视图的底边界将随着父视图高度的变化而按比例进行调整。否则，视图和其父视图的底边界的相对位置将保持不变。 |
| UIViewAutoresizingFlexibleTopMargin |
这个常量如果被设置，视图的上边界将随着父视图高度的变化而按比例进行调整。否则，视图和其父视图的上边界的相对位置将保持不变。 |
RootViewController.m
位置定位
//
// RootViewController.m
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "RootViewController.h"
#import <MapKit/MapKit.h>
@interface RootViewController ()<CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *locationManager;
@end
@implementation RootViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// 判断定位功能是否可以使用
if([CLLocationManager locationServicesEnabled])
{
// 初始化定位管理器
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
// 开始定位
[_locationManager startUpdatingLocation];
}
else
{
NSLog(@"定位功能不可用");
}
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *newLocation = [locations lastObject];
NSLog(@"%@", newLocation);
// 定位结束
[manager stopUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
NSLog(@"%@", error);
// 定位结束
[manager stopUpdatingLocation];
}
@end
RootViewController.m为什么需要判断定位功能可不可用呢?下图可以看出为什么了.
打印信息:
2014-05-15 09:25:11.883 CoreLocation[17610:60b] <+37.78583400,-122.40641700> +/- 5.00m (speed -1.00 mps / course -1.00) @ 5/15/14, 9:25:11 AM China Standard Time
本人将这个代理定位的方式改写成了可以使用block的方式:
YXLocation.h
//
// YXLocation.h
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@protocol YXLocationProtocol <NSObject>
@optional
- (void)currentLocation:(CLLocation *)location sucess:(BOOL)sucess;
@end
typedef void (^locationBlock_t)(CLLocation *currentLocation, BOOL sucess);
@interface YXLocation : NSObject
@property (nonatomic, copy, readwrite) locationBlock_t locationBlock;
@property (nonatomic, assign, readwrite) id<YXLocationProtocol> protocol;
@property (nonatomic, strong, readonly) CLLocation *location;
- (void)start;
@end
CodeYXLocation.m
//
// YXLocation.m
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "YXLocation.h"
@interface YXLocation ()<CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *locationManager;
@end
@implementation YXLocation
- (instancetype)init
{
self = [super init];
if (self)
{
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
}
return self;
}
- (void)start
{
if([CLLocationManager locationServicesEnabled])
{
[_locationManager startUpdatingLocation];
}
else
{
NSLog(@"定位功能没有开启");
if (_locationBlock)
{
_locationBlock(nil, NO);
}
if (_protocol)
{
[_protocol currentLocation:nil sucess:NO];
}
}
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *newLocation = [locations lastObject];
_location = newLocation;
if (_locationBlock)
{
_locationBlock(newLocation, YES);
}
if (_protocol)
{
[_protocol currentLocation:newLocation sucess:YES];
}
[_locationManager stopUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
NSLog(@"定位功能出错");
if (_locationBlock)
{
_locationBlock(nil, NO);
}
if (_protocol)
{
[_protocol currentLocation:nil sucess:NO];
}
}
@end
Code将经纬度转换为有意义的地址
//
// RootViewController.m
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "RootViewController.h"
#import <MapKit/MapKit.h>
@interface RootViewController ()<CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *locationManager;
@property (nonatomic, strong) CLGeocoder *geocoder;
@end
@implementation RootViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// 判断定位功能是否可以使用
if([CLLocationManager locationServicesEnabled])
{
// 初始化定位管理器
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
// 开始定位
[_locationManager startUpdatingLocation];
}
else
{
NSLog(@"定位功能不可用");
}
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *newLocation = [locations lastObject];
// 初始化经纬度解析器
_geocoder = [[CLGeocoder alloc] init];
// 解析经纬度值
[_geocoder reverseGeocodeLocation:newLocation
completionHandler:^(NSArray *placemarks, NSError *error) {
CLPlacemark *placemark = [placemarks objectAtIndex:0];
// 将字典信息拼接起来
NSString *locatedAt = \
[[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
// 打印信息
NSLog(@"我在 %@",locatedAt);
NSLog(@"国家代码 %@",placemark.ISOcountryCode);
NSLog(@"国家 %@",placemark.country);
NSLog(@"邮政编码 %@",placemark.postalCode);
NSLog(@"administrativeArea %@",placemark.administrativeArea);
NSLog(@"locality %@",placemark.locality);
NSLog(@"subLocality %@",placemark.subLocality);
NSLog(@"subThoroughfare %@",placemark.subThoroughfare);
}];
// 定位结束
[manager stopUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
NSLog(@"%@", error);
// 定位结束
[manager stopUpdatingLocation];
}
@end
RootViewController.m
打印信息如下:
2014-05-15 09:40:13.982 CoreLocation[2482:60b] 我在 中国北京市东城区东四街道东四朝阳门北小街2-1号
2014-05-15 09:40:13.986 CoreLocation[2482:60b] 国家代码 CN
2014-05-15 09:40:13.987 CoreLocation[2482:60b] 国家 中国
2014-05-15 09:40:13.988 CoreLocation[2482:60b] 邮政编码 (null)
2014-05-15 09:40:13.989 CoreLocation[2482:60b] administrativeArea 北京市
2014-05-15 09:40:13.991 CoreLocation[2482:60b] locality (null)
2014-05-15 09:40:13.992 CoreLocation[2482:60b] subLocality 东城区
2014-05-15 09:40:13.993 CoreLocation[2482:60b] subThoroughfare 2-1号
将有意义的地址转换为经纬度
//
// RootViewController.m
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "RootViewController.h"
#import <MapKit/MapKit.h>
@interface RootViewController ()<CLLocationManagerDelegate>
@property (nonatomic, strong) CLGeocoder *geocoder;
@end
@implementation RootViewController
- (void)viewDidLoad
{
[super viewDidLoad];
_geocoder = [[CLGeocoder alloc] init];
[_geocoder geocodeAddressString:@"中国北京市东城区东四街道东四朝阳门北小街2-1号"
completionHandler:^(NSArray *placemarks, NSError *error)
{
if([placemarks count] > 0 && error == nil)
{
NSLog(@"发现了 %lu placemark(s).",(unsigned long)[placemarks count]);
CLPlacemark *firstPlacemark = [placemarks objectAtIndex:0];
NSLog(@"经度 = %f",firstPlacemark.location.coordinate.longitude);
NSLog(@"纬度 = %f",firstPlacemark.location.coordinate.latitude);
}
else if ([placemarks count] == 0 && error == nil)
{
NSLog(@"没有找到 placemarks.");
}
else if (error != nil)
{
NSLog(@"错误 = %@",error);
}
}];
}
@end
RootViewController.m
打印信息:
2014-05-15 09:51:15.270 CoreLocation[2525:60b] 发现了 2 placemark(s).
2014-05-15 09:51:15.274 CoreLocation[2525:60b] 经度 = 116.425960
2014-05-15 09:51:15.275 CoreLocation[2525:60b] 纬度 = 39.931609
直接显示用户当前位置
//
// RootViewController.m
// CoreLocation
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "RootViewController.h"
#import <MapKit/MapKit.h>
@interface RootViewController ()<CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *locationManager;
@end
@implementation RootViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// 判断定位功能是否可以使用
if([CLLocationManager locationServicesEnabled])
{
// 初始化定位管理器
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
// 开始定位
[_locationManager startUpdatingLocation];
}
else
{
NSLog(@"定位功能不可用");
}
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
// 获取坐标信息
CLLocation *newLocation = [locations lastObject];
// 定位结束
[manager stopUpdatingLocation];
// 初始化地图控件
MKMapView *mapView = [[MKMapView alloc] initWithFrame:self.view.bounds];
// 地图的类型
mapView.mapType = MKMapTypeStandard;
// 视图的宽度和高度将和父视图的宽度一起成比例变化
mapView.autoresizingMask = \
UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// 显示用户所在位置(此处系统会询问你是否使用当前位置)
mapView.showsUserLocation = YES;
// 地图缩放级别
MKCoordinateSpan span = {0.02, 0.02};
// 被显示的区域
MKCoordinateRegion region = {newLocation.coordinate, span};
// 设置显示的区域
[mapView setRegion:region];
// 显示地图
[self.view addSubview:mapView];
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
NSLog(@"%@", error);
// 定位结束
[manager stopUpdatingLocation];
}
@end
RootViewController.m
