iOS CLLocationManager定位


     在iOS8以前的版本中,我們使用CLLocationManager定位是沒有問題的,最近在iOS8系統中卻無法定位了。。。。這是一大問題啊!

1、首先定義一個全局的變量用來記錄CLLocationManager對象,引入CoreLocation.framework使用#import <CoreLocation/CoreLocation.h>
 @property (nonatomic, strong) CLLocationManager  *locationManager;
2、初始化CLLocationManager並開始定位
locationManager=[[CLLocationManager alloc] init];
    locationManager.delegate=self;
    locationManager.desiredAccuracy=kCLLocationAccuracyBest;
    locationManager.distanceFilter=10; 
    [locationManager startUpdatingLocation];//開啟定位
3、實現CLLocationManagerDelegate的代理方法
#pragma mark CLLocationManagerDelegate
/**
* 獲取經緯度
*/ -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{ CLLocation *currLocation=[locations lastObject]; location.strLatitude=[NSString stringWithFormat:@"%f",currLocation.coordinate.latitude]; location.strLongitude=[NSString stringWithFormat:@"%f",currLocation.coordinate.longitude]; NSLog(@"la---%f, lo---%f",currLocation.coordinate.latitude,currLocation.coordinate.longitude);

 CLLocation *location=[[CLLocation alloc] initWithLatitude:currLocation.coordinate.latitude longitude:currLocation.coordinate.longitude];

    

    CLGeocoder *getCoder=[[CLGeocoder alloc]init];

    

    static NSString *strCity=@"";

    [getCoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {

        if (error) {

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

        }

        else{

            //            NSLog(@"placemarks count %lu",placemarks.count);

            

            _lalAddress=[[UILabel alloc]initWithFrame:CGRectMake(100, HEIGHT-100, WIDTH-200, 30)];

            

            [_lalAddress setTextAlignment:NSTextAlignmentCenter];

            [_lalAddress setTextColor:[UIColor whiteColor]];

            [_lalAddress setBackgroundColor:[UIColor blackColor]];

            [_lalAddress setAlpha:0.8f];

            //            [self.window.rootViewController.view addSubview:_lalAddress];

            for (CLPlacemark *placeMark in placemarks)

            {

                //                NSLog(@"地址name:%@ ",placeMark.name);

                //                NSLog(@"地址thoroughfare:%@",placeMark.thoroughfare);

                //                NSLog(@"地址subThoroughfare:%@",placeMark.subThoroughfare);

                //                NSLog(@"地址locality:%@",placeMark.locality);

                //                NSLog(@"地址subLocality:%@",placeMark.subLocality);

                //                NSLog(@"地址administrativeArea:%@",placeMark.administrativeArea);

                //                NSLog(@"地址subAdministrativeArea:%@",placeMark.subAdministrativeArea);

                //                NSLog(@"地址postalCode:%@",placeMark.postalCode);

                //                NSLog(@"地址ISOcountryCode:%@",placeMark.ISOcountryCode);

                //                NSLog(@"地址country:%@",placeMark.country);

                //                NSLog(@"地址inlandWater:%@",placeMark.inlandWater);

                //                NSLog(@"地址ocean:%@",placeMark.ocean);

                //                NSLog(@"地址areasOfInterest:%@",placeMark.areasOfInterest);

                

                strCity=placeMark.administrativeArea;

                

            }

             

            

        }

    }];

}
/**
 *定位失敗,回調此方法
 */
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    if ([error code]==kCLErrorDenied) {
        NSLog(@"訪問被拒絕");
    }
    if ([error code]==kCLErrorLocationUnknown) {
        NSLog(@"無法獲取位置信息");
    }
}

 iOS8中使用CoreLocation定位

1、在使用CoreLocation前需要調用如下函數【iOS8專用】:
iOS8對定位進行了一些修改,其中包括定位授權的方法,CLLocationManager增加了下面的兩個方法:
(1)始終允許訪問位置信息
- (void)requestAlwaysAuthorization;
 
        
(2)使用應用程序期間允許訪問位置數據
- (void)requestWhenInUseAuthorization;
   示例如下:
locationManager=[[CLLocationManager alloc] init];
    locationManager.delegate=self;
    locationManager.desiredAccuracy=kCLLocationAccuracyBest;
    locationManager.distanceFilter=10;
    if (iOSVersion>=8) {
        [locationManager requestWhenInUseAuthorization];//使用程序其間允許訪問位置數據(iOS8定位需要)
    }
    [locationManager startUpdatingLocation];//開啟定位
2、在Info.plist文件中添加如下配置:
(1)NSLocationAlwaysUsageDescription
(2)NSLocationWhenInUseUsageDescription

這樣添加后,定位功能就能正常使用了!


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