iOS 8.3 Xcode 6.3.1中未调用核心位置委托方法 [英] Core Location delegate methods not getting called in iOS 8.3 Xcode 6.3.1

问题描述

我试图使用Xcode 6.3.1中的Core Location Framework获取用户的当前位置，我做了以下事情:

I am trying to get the user's current location using the Core Location Framework in Xcode 6.3.1, I did following things:

1. 在 Target -> General -> Linked Frameworks&图书馆

2. 我的 ViewController.h 文件如下所示，

1. Added Core Location Framework under Target-> General-> Linked Frameworks & Libraries

2. My ViewController.h file is as shown below,

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

@interface ViewController : UIViewController<CLLocationManagerDelegate>
@property (weak, nonatomic) IBOutlet UILabel *lblLatitude;
@property (weak, nonatomic) IBOutlet UILabel *lblLongitude;
@property (weak, nonatomic) IBOutlet UILabel *lblAddress;
@property (strong, nonatomic) CLLocationManager *locationManager;

@end

我的ViewController.m文件如下所示，

My ViewController.m file is as shown below,

- (void)viewDidLoad
{

[super viewDidLoad];
self.locationManager = [[CLLocationManager alloc] init];

self.locationManager.delegate = self;
if(IS_OS_8_OR_LATER){
    NSUInteger code = [CLLocationManager authorizationStatus];
    if (code == kCLAuthorizationStatusNotDetermined && ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)] || [self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])) {
    if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationAlwaysUsageDescription"]){
        [self.locationManager requestAlwaysAuthorization];
    } else if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"]) {
        [self.locationManager  requestWhenInUseAuthorization];
    } else {
        NSLog(@"Info.plist does not contain NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription");
    }
}
}
[self.locationManager startUpdatingLocation];
}

#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    NSLog(@"didFailWithError: %@", error);
    UIAlertView *errorAlert = [[UIAlertView alloc]
                       initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    if (currentLocation != nil) {
        lblLatitude.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
        lblLongitude.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
    }
}
@end

我还在我的info.plist文件中添加了以下键

I had also added the following keys in my info.plist file

• NSLocationWhenInUseUsesDescription
• NSLocationAlwaysUsageDescription

在此处，

Checked everything given here, here, here, here, and a lot more list

那么，有谁对此问题有解决方案，请帮忙.一整天都在寻找这个东西.

So, is anyone having a solution for this issue, kindly help. Have lost my mind searching for this for the whole day.

推荐答案

是的！得到了解决方案，这是我的完整代码&增加了使其正常工作的功能.特别感谢@MBarton的大力帮助.也感谢@ Vinh Nguyen投入宝贵的时间来解决我的问题.

Yeah! Got the solution, Here is my whole code & things added to make it working. Special thanks to @MBarton for his great help. Also Thanks to @ Vinh Nguyen for investing his precious time in solving my issue.

在 Target-> General-> Linked Frameworks&中添加了 Core Location Framework .图书馆

Added Core Location Framework under Target-> General-> Linked Frameworks & Libraries

添加到.plist文件

Added in .plist file

NSLocationAlwaysUsageDescription

请参阅屏幕截图:

在我的ViewController.h

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

// #define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)

@interface ViewController : UIViewController  <MKMapViewDelegate,  CLLocationManagerDelegate>
{
    __weak IBOutlet UINavigationItem *navigationItem;
}

 @property (weak, nonatomic) IBOutlet MKMapView *mapView;
 @property(nonatomic, retain) CLLocationManager *locationManager;

@end

然后在ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize mapView;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    [self setUpMap];
}

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

-(void)setUpMap
{
    mapView.delegate = self;
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
#ifdef __IPHONE_8_0
   // if(IS_OS_8_OR_LATER) {
    if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) { 
        // Use one or the other, not both. Depending on what you put in info.plist
        [self.locationManager requestAlwaysAuthorization];
    }
#endif
    [self.locationManager startUpdatingLocation];

    mapView.showsUserLocation = YES;
    [mapView setMapType:MKMapTypeStandard];
    [mapView setZoomEnabled:YES];
    [mapView setScrollEnabled:YES];
}

-(void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:YES];

    self.locationManager.distanceFilter = kCLDistanceFilterNone;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [self.locationManager startUpdatingLocation];
    NSLog(@"%@", [self deviceLocation]);

    //View Area
    MKCoordinateRegion region = { { 0.0, 0.0 }, { 0.0, 0.0 } };
    region.center.latitude = self.locationManager.location.coordinate.latitude;
    region.center.longitude = self.locationManager.location.coordinate.longitude;
    region.span.longitudeDelta = 0.005f;
    region.span.longitudeDelta = 0.005f;
    [mapView setRegion:region animated:YES];

}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];
}
- (NSString *)deviceLocation {
    return [NSString stringWithFormat:@"latitude: %f longitude: %f", self.locationManager.location.coordinate.latitude, self.locationManager.location.coordinate.longitude];
}

U ...自从过去5天以来与许多代码战斗之后，得到了解决方案...

Ufff...! Got the solution after fighting with many codes since last 5 days...

这篇关于iOS 8.3 Xcode 6.3.1中未调用核心位置委托方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！