标签：mkmapview cllocationmanagerdel clgeocoder 地图开发 位置服务
本章主要简示了IOS里面位置服务的使用，包括定位，地图，地图标记以及地图定位。由于现在的地图开发和以前的差别比较大，而且地图涉及的东西相对而言复杂点，所以本实验耗时比较多，有的地方还存在一些问题。
注意文本框的两个数字是当前的经纬度，地图视图切换是切换到该经纬度的位置，最后红色的那个标注即为地图中的经纬度，不过由于经纬度解析部分有问题，所以未能显示经纬度的对应地址是什么。（示例里面不是使用代理来解析经纬度的，使用的是CLGeocoder，因为以前使用的代理官方建议不再使用了。）
1.在开始工程之前需要知道主要步骤：a.定位当前的地址 b.解析经纬度获取对应的地址，然后地图视图切换到该位置 c.在地图上标注该位置
2.定位部分因为看到的教程较老，所以实际操作有差别，最新的定位需要增加授权。其主要方法是在修改info.list文件，然后再代码里面添加授权代码。如下所示：
/*
1.Info.plist中加入两个缺省没有的字段
NSLocationAlwaysUsageDescription
NSLocationWhenInUseUsageDescription
并设置值为YES
*/
//2.在启动定位前设置授权
// 开始定位
-(void)onLocate
{
self._textLocationInfo.text = @"";
self._locateManage = [[CLLocationManager alloc] init];
self._locateManage.delegate = self;
self._locateManage.desiredAccuracy = kCLLocationAccuracyBest;
self._locateManage.distanceFilter = 1000;
// 新版本需要授权
if ([[[UIDevice currentDevice] systemVersion] doubleValue] > 8.0)
{
[self._locateManage requestWhenInUseAuthorization];
}
[self._locateManage startUpdatingLocation];
[self._locateActivityIndicator startAnimating];
}
3.实现定位代理的协议和地图代理协议，主要是完成以下方法：
#pragma 实现协议CLLocationManagerDelegate
// 定位成功调用该方法，数组里面最后的成员为最新的地址
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations
// 授权完成调用该方法，可查看授权状态
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status;
// 定位失败调用该方法
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error;
#pragma 实现协议MKMapViewDelegate
// 画标注
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation;4.在获取地址成功后，根据地址中的经纬度设置地图视图，然后使用CLGeocoder解析经纬度地址。
5.解析出地址后需要在地图上标注出当前位置，此时需要新建一个类，实现标注的协议，指定标注的经纬度、标题以及子标题
6.完成后，停止定位
//
// ViewController.h
// FindMe
//
// Created by God Lin on 14/12/13.
// Copyright (c) 2014年 arbboter. All rights reserved.
//
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@interface ViewController : UIViewController <CLLocationManagerDelegate, MKMapViewDelegate>
{
MKMapView* _mapView;
UIButton* _buttonLocate;
UITextView* _textLocationInfo;
UIActivityIndicatorView* _locateActivityIndicator;
CLLocationManager* _locateManage;
}
@property (nonatomic, retain) MKMapView* _mapView;
@property (nonatomic, retain) UIButton* _buttonLocate;
@property (nonatomic, retain) UITextView* _textLocationInfo;
@property (nonatomic, retain) UIActivityIndicatorView* _locateActivityIndicator;
@property (nonatomic, retain) CLLocationManager* _locateManage;
@end
//
// ViewController.m
// FindMe
//
// Created by God Lin on 14/12/13.
// Copyright (c) 2014年 arbboter. All rights reserved.
//
#import "ViewController.h"
#import "MapLocation.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize _buttonLocate, _locateActivityIndicator, _mapView, _textLocationInfo;
@synthesize _locateManage;
// 界面控件布局
-(void)autoLayout
{
CGFloat _x = self.view.frame.origin.x;
CGFloat _y = self.view.frame.origin.y;
CGFloat _w = self.view.frame.size.width;
CGFloat _h = self.view.frame.size.height;
CGFloat xEdge = 10;
CGFloat yEdge = 10;
CGFloat x = _x + xEdge;
CGFloat y = _y + 2*yEdge;
CGFloat w = _w - 2*xEdge;
CGFloat h = 50;
self._mapView.frame = CGRectMake(x, y, w, _h - y - yEdge - h);
y = self._mapView.frame.origin.y + self._mapView.frame.size.height + yEdge;
h -= 5;
self._buttonLocate.frame = CGRectMake(x, y, w/5, h);
self._buttonLocate.layer.cornerRadius = 10;
self._buttonLocate.layer.borderWidth = 1;
[self._buttonLocate setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[self._buttonLocate setTitle:@"Locate" forState:UIControlStateNormal];
CGFloat xSameLevelEdge = 2;
x = x + self._buttonLocate.frame.size.width;
self._textLocationInfo.frame = CGRectMake(x+xSameLevelEdge, y, 4*w/5-xSameLevelEdge, h);
self._textLocationInfo.layer.borderWidth = 1;
self._textLocationInfo.layer.cornerRadius = 10;
self._textLocationInfo.editable = NO;
self._locateActivityIndicator.frame = CGRectMake(0,0, h*2, h*2);
[self._locateActivityIndicator setCenter:CGPointMake(_w/2, _h/2)];
[self._locateActivityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhiteLarge];
self._locateActivityIndicator.color = [UIColor blackColor];
}
// 开始定位
-(void)onLocate
{
self._textLocationInfo.text = @"";
self._locateManage = [[CLLocationManager alloc] init];
self._locateManage.delegate = self;
self._locateManage.desiredAccuracy = kCLLocationAccuracyBest;
self._locateManage.distanceFilter = 1000;
// 新版本需要授权
if ([[[UIDevice currentDevice] systemVersion] doubleValue] > 8.0)
{
[self._locateManage requestWhenInUseAuthorization];
}
[self._locateManage startUpdatingLocation];
[self._locateActivityIndicator startAnimating];
}
-(void)stopLocate
{
if(self._locateManage)
{
[self._locateManage stopUpdatingLocation];
self._locateManage.delegate = nil;
[self._locateManage release];
self._locateManage = nil;
[self._locateActivityIndicator stopAnimating];
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
self._mapView = [[MKMapView alloc] init];
[self.view addSubview:self._mapView];
self._buttonLocate = [[UIButton alloc] init];
[self._buttonLocate addTarget:self action:@selector(onLocate) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self._buttonLocate];
self._textLocationInfo = [[UITextView alloc] init];
[self.view addSubview:self._textLocationInfo];
self._locateActivityIndicator = [[UIActivityIndicatorView alloc] init];
[self.view addSubview:self._locateActivityIndicator];
[self autoLayout];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)dealloc
{
[_locateActivityIndicator release];
[_mapView release];
[_textLocationInfo release];
[_buttonLocate release];
[super dealloc];
}
#pragma 实现协议CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations
{
NSLog(@"%@", locations);
CLLocation* curLocation = [locations lastObject];
// 地图定位到当前位置
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(curLocation.coordinate, 1000, 1000);
viewRegion = [self._mapView regionThatFits:viewRegion];
[self._mapView setRegion:viewRegion animated:YES];
// 解析经纬度为地址，在地图上添加标注
MapLocation* annotation = [[MapLocation alloc] init];
annotation.coordinate = curLocation.coordinate;
CLGeocoder* geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:curLocation completionHandler:^(NSArray *placemarks, NSError *error)
{
if(error)
{
NSLog(@"CLGeocoder error -> %@", [error localizedDescription]);
}
else
{
CLPlacemark *placemark = [placemarks lastObject];
NSString* startAddressString = [NSString stringWithFormat:@"%@ %@ %@ %@ %@ %@",
placemark.subThoroughfare, placemark.thoroughfare,
placemark.postalCode, placemark.locality,
placemark.administrativeArea,
placemark.country];
NSLog(@"地址为:%@", startAddressString);
annotation._city = placemark.locality;
annotation._country = placemark.country;
annotation._streetAddrerss = placemark.thoroughfare;
annotation._zip = placemark.postalCode;
annotation._state = placemark.name;
}
}];
[self._mapView addAnnotation:annotation];
[geoCoder release];
// 设置文本信息
NSString* stringLocation = [[NSString alloc] initWithFormat:@"%@\n%@", annotation.subtitle, annotation.title];
self._textLocationInfo.text = stringLocation;
[stringLocation release];
[annotation release];
[self stopLocate];
}
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
NSLog(@"Authorization finished. status = %d", status);
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Locate Failed" message:[error description] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
NSLog(@"%@", [error description]);
[alert show];
[alert release];
[self._locateActivityIndicator stopAnimating];
[self stopLocate];
}
#pragma 实现协议MKMapViewDelegate
// 画标注
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation;
{
MKPinAnnotationView* annotationView = (MKPinAnnotationView*)[self._mapView dequeueReusableAnnotationViewWithIdentifier:@"annotationView"];
if(annotationView == nil)
{
annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"annotationView"] autorelease];
}
annotationView.canShowCallout = YES;
annotationView.pinColor = MKPinAnnotationColorRed;
annotationView.animatesDrop = YES;
return annotationView;
}
@end
简易地图(MKMapView,CLLocationManagerDelegate,CLGeocoder)
标签：mkmapview cllocationmanagerdel clgeocoder 地图开发 位置服务
原文地址：http://blog.csdn.net/arbboter/article/details/41926309
