手机定位DEMO

#import "ViewController.h"

#import <MapKit/MapKit.h>

#import <CoreLocation/CoreLocation.h>

// 获取当前版本号

#define kCURRENTVERSION [[[UIDevice currentDevice] systemVersion] floatValue]

@interface ViewController ()<CLLocationManagerDelegate, UIAlertViewDelegate, UITextFieldDelegate>

@property (nonatomic, strong) CLLocationManager *locManager; // 获取当前经纬度

@property (nonatomic, strong) CLGeocoder *geocoder;  // 经过经纬度转换成地址

@property (strong, nonatomic) IBOutlet UILabel *longitudeLabel; // 经度

@property (strong, nonatomic) IBOutlet UILabel *latitudeLabel; // 纬度

@property (strong, nonatomic) IBOutlet UILabel *addressLabel; // 详细地址

@property (strong, nonatomic) IBOutlet UILabel *stateLabel; // 省份

- (IBAction)getAction:(id)sender; // 获取当前经纬度的按钮

@property (strong, nonatomic) IBOutlet UITextField *addressTextField; // 输入地址的textfield

- (IBAction)addressInput:(id)sender; // 根据地址转换成经纬度按钮

 

@end

 

@implementation ViewController

#pragma mark 实现懒加载

- (CLLocationManager *)locManager

{

    if (_locManager == nil) {

        self.locManager = [[CLLocationManager alloc] init];

        self.locManager.delegate = self;

    }

    return _locManager;

}

 

- (CLGeocoder *)geocoder

{

    if (_geocoder == nil) {

        self.geocoder = [[CLGeocoder alloc] init];

    }

    return _geocoder;

}

 

#pragma mark 页面消失的时候关闭定位

- (void)viewWillDisappear:(BOOL)animated

{

    [super viewWillDisappear:animated];

    // 关闭定位

    [self.locManager stopUpdatingLocation];

}

 

- (void)viewDidLoad {

    [super viewDidLoad];

    

    // 初始化设置

    self.longitudeLabel.textAlignment = NSTextAlignmentCenter;

    self.latitudeLabel.textAlignment = NSTextAlignmentCenter;

    self.addressLabel.numberOfLines = 0;

    self.addressTextField.delegate = self;

}

 

 

- (void)requestWhenInUseAuthorization

{

    self.locManager.desiredAccuracy = kCLLocationAccuracyBest;

    self.locManager.distanceFilter = 10;

#pragma mark ------------如下二选一---------------

    [self.locManager requestWhenInUseAuthorization];//当程序运行的时候获取定位权限

    //[self.locManager requestAlwaysAuthorization]; // 程序一直获取定位权限

}

 

//协议中的方法，做用是每当位置发生更新时会调用的委托方法

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations

{

    // 获取数组第一个元素

    CLLocation *loc = [locations firstObject];

    // 获取经度

    self.longitudeLabel.text = [NSString stringWithFormat:@"%f", loc.coordinate.longitude];

    // 获取纬度

    self.latitudeLabel.text = [NSString stringWithFormat:@"%f", loc.coordinate.latitude];

    

    // 将经纬度转换成地址

    

    [self.geocoder reverseGeocodeLocation:loc completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {

        // 判断数组是否为空

        if (placemarks.count > 0)

        {

            // 数组不为空

            CLPlacemark *placemark = [placemarks objectAtIndex:0];

            NSDictionary *dic = placemark.addressDictionary;

            // 转换成详细地址

            [self getAddress:dic];

            //获取城市

            NSString *city = placemark.locality;

            if (!city) {

                //四大直辖市的城市信息没法经过locality得到，只能经过获取省份的方法来得到（若是city为空，则可知为直辖市）

                city = placemark.administrativeArea;

            }

            // 将省份显示

            self.stateLabel.text = city;

        }

        // 地址获取失败

        else if (error == nil && [placemarks count] == 0)

        {

            NSLog(@"No results were returned.");

        }

        else if (error != nil)

        {

            NSLog(@"An error occurred = %@", error);

        }

    }];

    [self.locManager stopUpdatingLocation];

}

 

#pragma mark 获取当前详细地址

- (void) getAddress:(NSDictionary *) addressDic

{

    //NSString *state=[addressDic objectForKey:@"State"]; // 省份

    NSString *city=[addressDic objectForKey:@"City"]; // 城市

    NSString *subLocality=[addressDic objectForKey:@"SubLocality"]; // 区

    NSString *street=[addressDic objectForKey:@"Street"]; // 街道

    NSString *address = [[city stringByAppendingString:subLocality] stringByAppendingString:street]; // 拼接地址

    self.addressLabel.text = address; // 显示地址

}

 

//当位置获取或更新失败会调用的方法

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

{

    NSString *errorMsg = nil; // 做为提示框的信息

    if ([error code] == kCLErrorDenied) {

        errorMsg = @"访问被拒绝,请容许应用获取定位权限";

    }

    if ([error code] == kCLErrorLocationUnknown) {

        errorMsg = @"获取位置信息失败";

    }

    

    // 建立提示框

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"定位失败" message:errorMsg preferredStyle:(UIAlertControllerStyleAlert)];

    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确认" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {

        // 当应用无权限获取位置信息 从新获取

        [self requestWhenInUseAuthorization];

    }];

    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleCancel) handler:nil];

    [alertController addAction:cancelAction];

    [alertController addAction:okAction];

    [self presentViewController:alertController animated:YES completion:nil];

    

}

 

#pragma mark 定位失败提示

- (void) showAlert:(NSString *) notice

{

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"定位失败" message:notice preferredStyle:(UIAlertControllerStyleAlert)];

    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确认" style:(UIAlertActionStyleDefault) handler:nil];

    [alertController addAction:okAction];

    //[self.view addSubview:alertController.view];

    [self presentViewController:alertController animated:YES completion:^{

        

    }];

}

 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

}

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

#pragma mark 获取当前经纬度 button点击事件

- (IBAction)getAction:(id)sender {

    // 判断手机定位是否打开

    if (kCURRENTVERSION >= 8.0) {

        if ([CLLocationManager locationServicesEnabled]) {

            [self requestWhenInUseAuthorization];

            

            // 设置距离筛选器distanceFilter，没有筛选器设置

            self.locManager.distanceFilter = kCLDistanceFilterNone;

            // 精确度 当前选择最精确

            self.locManager.desiredAccuracy = kCLLocationAccuracyBest;

            [self.locManager startUpdatingLocation];

        }

        else

        {

            [self showAlert:@"手机定位未开启"];

        }

    }

}

 

#pragma mark 获取地址的经纬度 button点击事件

- (IBAction)addressInput:(id)sender {

    NSString *address = self.addressTextField.text;

    // 判断地址是否为空

    if (address.length == 0) {

        [self showAlert:@"地址不能为空"];

        return;

    }

    // 地址不为空 转换成 CLGeocoder 类型

    [self.geocoder geocodeAddressString:address completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {

        if (error || placemarks.count == 0) {

            [self showAlert:@"你输入的地址没找到，可能在火星上"];

        }

        else{

            // 取第一个元素

            CLPlacemark *firstPlacemark = [placemarks firstObject];

            // 获取第一个元素的经纬度

            CLLocationCoordinate2D coordinate = firstPlacemark.location.coordinate;

            

            self.longitudeLabel.text = [NSString stringWithFormat:@"%f", coordinate.longitude];

            self.latitudeLabel.text = [NSString stringWithFormat:@"%f", coordinate.latitude];

        }

    }];

}

 

// 回收键盘

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    [textField resignFirstResponder];

       return YES;

}

 

 

@end