如何在 iPhone 应用程序中获取当前位置答案

【问题标题】：how to get current location in iPhone app如何在 iPhone 应用程序中获取当前位置
【发布时间】：2014-02-01 18:22:08
【问题描述】：

现在我的代码只是打开地图文件，但我想要当前位置

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


@interface ViewController : UIViewController<CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
CLLocation *currentLocation;
}
@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    locationManager = [CLLocationManager new];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager startUpdatingLocation];
}
#pragma mark CLLocationManager Delegate
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    currentLocation = [locations objectAtIndex:0];
    [locationManager stopUpdatingLocation];
    NSLog(@"Detected Location : %f, %f", currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
    CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:currentLocation
                   completionHandler:^(NSArray *placemarks, NSError *error) {
                       if (error){
                           NSLog(@"Geocode failed with error: %@", error);
                           return;
                       }
                       CLPlacemark *placemark = [placemarks objectAtIndex:0];
                       NSLog(@"placemark.ISOcountryCode %@",placemark.ISOcountryCode);

                   }];
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

此代码将为我打开一个地图视图，但它不是我当前的位置请帮助我现在我想在我的应用程序中显示我的当前位置

提前致谢

【问题讨论】：

您在设备或模拟器中运行？现在检测到的位置是哪个？
CoreLocation 仅适用于设备！

标签： ios iphone objective-c

【解决方案1】：

获取位置后，设置地图视图的中心

[mapView setCenterCoordinate: currentLocation.coordinate animated:YES];

【讨论】：

感谢回答，但获取我在 Xib 或故事板中的当前位置是否可能

【解决方案2】：

设置

mapView.showsUserLocation = YES;

【讨论】：

【解决方案3】：

    <CoreLocation/CoreLocation.h>

在 appdelegate.m 中写入以下行

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:       (NSDictionary *)launchOptions{
if (locationManager == nil)
        locationManager = [[CLLocationManager alloc] init];

    locationManager.delegate = self;
    [locationManager setDesiredAccuracy:kCLLocationAccuracyBestForNavigation];
    locationManager.distanceFilter = 500; // meters
    [locationManager startUpdatingLocation];
}

并添加以下方法

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation    *)newLocation fromLocation:(CLLocation *)oldLocation
{
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error)
 {
     if(placemarks.count)
     {
         NSDictionary *dictionary = [[placemarks objectAtIndex:0] addressDictionary];
         self.strAddress = [NSString stringWithFormat:@"%@", [dictionary valueForKey:@"Street"]];
         if (self.strAddress==(id) [NSNull null] || [self.strAddress length]==0 || [self.strAddress isEqualToString:@""])
         {
             self.strAddress = [NSString stringWithFormat:@"%@", [dictionary valueForKey:@"Name"]];
         }
         if ([dictionary valueForKey:@"City"]==(id) [NSNull null] || [[dictionary valueForKey:@"City"] length]==0)
         {
             self.strAddress = [NSString stringWithFormat:@"%@, %@", strAddress, [dictionary valueForKey:@"State"]];
         }
         else if ([dictionary valueForKey:@"State"]==(id) [NSNull null] || [[dictionary valueForKey:@"State"] length]==0)
         {
             NSArray *arr = [dictionary valueForKey:@"FormattedAddressLines"];
             self.strAddress = [arr objectAtIndex:0];
             for (int i=1; i<arr.count; i++)
             {
                 self.strAddress = [NSString stringWithFormat:@"%@, %@", self.strAddress, [arr objectAtIndex:i]];
             }
         }
         else
         {
             self.strAddress = [NSString stringWithFormat:@"%@, %@", strAddress, [dictionary valueForKey:@"City"]];
         }
     }
 }];
return;

}

【讨论】：