iOS8 定位

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>

@interface ANNViewController : UIViewController <CLLocationManagerDelegate>

@end

#import "ANNViewController.h"

@interface ANNViewController ()
@property (strong, nonatomic) IBOutlet UILabel *longitude;
@property (strong, nonatomic) IBOutlet UILabel *latitude;

@property (strong, nonatomic) IBOutlet UILabel *location;
@property (strong, nonatomic) CLLocationManager *locationManager;

@end

@implementation ANNViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor whiteColor];
//ios 8后
//在Info.plist中加入两个缺省没有的字段
//NSLocationAlwaysUsageDescription
//NSLocationWhenInUseUsageDescription

//创建CLLocationManager对象
self.locationManager = [[CLLocationManager alloc] init];
//设置代理为自己
if ([CLLocationManager locationServicesEnabled]) {
NSLog( @"Starting CLLocationManager" );
self.locationManager.delegate = self;
[self.locationManager requestAlwaysAuthorization];

self.locationManager.distanceFilter = 200;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[self.locationManager startUpdatingLocation];
} else {
NSLog( @"Cannot Starting CLLocationManager" );
/*self.locationManager.delegate = self;
self.locationManager.distanceFilter = 200;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[self.locationManager startUpdatingLocation];*/
}
}
- (IBAction)locationButton:(UIButton *)sender {
[self.locationManager startUpdatingLocation];
}

- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{

//将经度显示到label上
self.longitude.text = [NSString stringWithFormat:@"%lf", newLocation.coordinate.longitude];
//将纬度现实到label上
self.latitude.text = [NSString stringWithFormat:@"%lf", newLocation.coordinate.latitude];

// 获取当前所在的城市名
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
//根据经纬度反向地理编译出地址信息
[geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *array, NSError *error)
{
if (array.count > 0)
{
CLPlacemark *placemark = [array objectAtIndex:0];

//将获得的所有信息显示到label上
self.location.text = placemark.name;
//获取城市
NSString *city = placemark.locality;
if (!city) {
//四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
city = placemark.administrativeArea;
}
NSLog(@"city = %@", city);

}
else if (error == nil && [array count] == 0)
{
NSLog(@"No results were returned.");
}
else if (error != nil)
{
NSLog(@"An error occurred = %@", error);
}
}];

//系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
//    [manager stopUpdatingLocation];
}

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(nonnull NSError *)error
{
NSLog(@"%@",error);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end