iOS.定位服务与地图应用.01.定位服务编程

#import <UIKit/UIKit.h>

#import <CoreLocation/CoreLocation.h>

#import <CoreLocation/CLLocationManagerDelegate.h>



@interface T20140621195534ViewController : UIViewController<CLLocationManagerDelegate>



//经度

@property (weak, nonatomic) IBOutlet UITextField *txtLng;

//纬度

@property (weak, nonatomic) IBOutlet UITextField *txtLat;

//高度

@property (weak, nonatomic) IBOutlet UITextField *txtAlt;



@property(nonatomic, strong) CLLocationManager *locationManager;



@end

 

#import "T20140621195534ViewController.h"



@interface T20140621195534ViewController ()



@end



@implementation T20140621195534ViewController



- (void)viewDidLoad

{

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    

    //定位服务管理对象初始化

    _locationManager = [[CLLocationManager alloc] init];

    _locationManager.delegate = self;

    _locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    _locationManager.distanceFilter = 1000.0f;

}



- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    //开始定位

    [_locationManager startUpdatingLocation];

}



- (void)viewWillDisappear:(BOOL)animated

{

    [super viewWillDisappear:animated];

    //停止定位

    [_locationManager stopUpdatingLocation];

}

#pragma mark Core Location委托方法用于实现位置的更新

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

{

    CLLocation *currLocation = [locations lastObject];

    _txtLat.text = [NSString stringWithFormat:@"%3.5f",

                    currLocation.coordinate.latitude];

    _txtLng.text = [NSString stringWithFormat:@"%3.5f",

                    currLocation.coordinate.longitude];

    _txtAlt.text = [NSString stringWithFormat:@"%3.5f",

                    currLocation.altitude];

    

}



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

{

    NSLog(@"error: %@",error);

}

@end