[IOS]IOS8下地圖定位的使用方法

和ios7比較，稍微增加了些變動

1.在Info.plist表裏面添加兩個變量

NSLocationAlwaysUsageDescription

NSLocationWhenInUseUsageDescription

首先這2個字段沒有特別的意思，可以理解爲使用定位時候的提示語

添加之後在h文件：

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import "Corelocation/CLLocationManagerDelegate.h"
@interface MapViewController : UIViewController<CLLocationManagerDelegate>

@property (strong, nonatomic)    CLLocationManager* locationManager;

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

@property (weak, nonatomic) IBOutlet UITextField *latituduText;
- (IBAction)findme:(id)sender;

@end

m文件中：

- (void)viewDidLoad {
    [super viewDidLoad];
      _locationManager = [[CLLocationManager alloc]init];
    _locationManager.delegate = self;
    [_locationManager requestAlwaysAuthorization];
    _locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    _locationManager.distanceFilter = kCLDistanceFilterNone;
    
   
}

-(void)viewWillAppear:(BOOL)animated
{
        [super viewWillAppear:animated];
       [self.locationManager startUpdatingLocation];//定位是需要不斷的請求當前的位置，放在willappear最適合
}
-(void)viewWillDisappear:(BOOL)animated
{
        [super viewWillDisappear:animated];
       [self.locationManager stopUpdatingLocation];
}

另外相較於ios8之前的地圖定位，還要調用代理：

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
    switch (status) {
        case kCLAuthorizationStatusNotDetermined:
            if ([_locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
                [_locationManager requestWhenInUseAuthorization];
            }
            break;
        default:
            break;
    }
}

調用完成後，其他方法和ios7一樣

  - (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
    {
    _latituduText.text = [NSString stringWithFormat:@"%3.5f",newLocation.coordinate.latitude];
    _longitudeText.text = [NSString stringWithFormat:@"%3.5f",newLocation.coordinate.longitude];
      [_locationManager stopUpdatingLocation];
    NSLog(@"location ok");
  
    
   
    
}

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