获取当前位置信息－ios

locationManager= [[CLLocationManager alloc] init];//位置管理器
        locationManager.desiredAccuracy = kCLLocationAccuracyBest;//精度，设可而止
        locationManager.delegate = self;//设置委托
        locationManager.distanceFilter = 100.0f;//距离删选器
        [locationManager startUpdatingLocation]; //启动位置管理器

#pragma mark -
#pragma mark locationManager
-  (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    //获取所在地城市名
    CLGeocoder *geocoder=[[CLGeocoder alloc]init];
    [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks,NSError *error)
     {
         for(CLPlacemark *placemark in placemarks)
         {
             
            NSString *str1=[[placemark.addressDictionary objectForKey:@"Name"] substringFromIndex:0];
            NSLog(@"%@", [NSString stringWithFormat:@"我的位置：%@",str1]);
             UITextView *locText = (UITextView*)[self.view viewWithTag:];
         }
     }];
    //map region
    [geocoder release];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    
    if (error.code == kCLErrorDenied) {
        [[[[UIAlertView alloc] initWithTitle:@"错误信息"
                                     message:@"无法获取您的定位信息"
                                    delegate:nil
                           cancelButtonTitle:@"OK"
                           otherButtonTitles:nil] autorelease] show];
        [locationManager stopUpdatingLocation];
    }
}