如何获取当前位置IOS设备

Question

I have been using GMSMap in my app. I want in my GMSMap user current location lat long. I am used lots of method but don't get current location. Please help and guid how to get my current location. I have read many tutorial and follow but don't get.

I have one question, I am using methods and any other work will be in my project? I am so tired please help.

Firstly I have write show bellow methods in my project then create IPA and install my device. But don't get current location latitude longitude.

Please help. Thankyou

First

-(void)CurrentLocationIdentifier
 {
//---- For getting current gps location
locationManager = [CLLocationManager new];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
//------
 }
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
currentLocation = [locations objectAtIndex:0];
[locationManager stopUpdatingLocation];
CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
[geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error)
 {
     if (!(error))
     {
         CLPlacemark *placemark = [placemarks objectAtIndex:0];
         NSLog(@"\nCurrent Location Detected\n");
         NSLog(@"placemark %@",placemark);
         NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
         NSString *Address = [[NSString alloc]initWithString:locatedAt];
         _adrs_lbl.text = Address;
         NSString *Area = [[NSString alloc]initWithString:placemark.locality];
        NSString *Country = [[NSString alloc]initWithString:placemark.country];
         _lat_lbl.text = Country;

         NSString *CountryArea = [NSString stringWithFormat:@"%@, %@", Area,Country];
         NSLog(@"%@",CountryArea);
         _long_lbl.text = CountryArea;

     }
     else
     {
         NSLog(@"Geocode failed with error %@", error);
         NSLog(@"\nCurrent Location Not Detected\n");
         //return;
         //CountryArea = NULL;

     }

 }];
 }

Second

- (void)viewDidLoad
{
[super viewDidLoad];

if ([CLLocationManager locationServicesEnabled]) {
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    [self.locationManager startUpdatingLocation];
} else {
    NSLog(@"Location services are not enabled");
}
}

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *location = [locations lastObject];
self.latitudeValue.text = [NSString stringWithFormat:@"%f", location.coordinate.latitude];
self.longtitudeValue.text = [NSString stringWithFormat:@"%f", location.coordinate.longitude];
 }

UPDATED QUESTION

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
currentLocation = [locations lastObject];
if (currentLocation != nil){
    NSLog(@"The latitude value is - %@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude]);
    NSLog(@"The logitude value is - %@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude]);
}
//Current
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:currentLocation.coordinate.latitude longitude: currentLocation.coordinate.longitude zoom:13];

self.mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
self.mapView.myLocationEnabled = YES;
self.mapView.delegate = self;
self.mapView.frame = viewDirection.bounds;
[viewDirection addSubview:self.mapView];

//    GMSMarker *marker = [[GMSMarker alloc] init];
//    marker.position = CLLocationCoordinate2DMake(currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
//    marker.title = @"Your Office Name";
//    marker.icon = [UIImage imageNamed:@"boss-icon.png"];
//    //OR
//    marker.icon = [GMSMarker markerImageWithColor:[UIColor blueColor]];
//    marker.snippet = @"Current Location";
//    marker.map = self.mapView;


GMSMarker *marker1 = [[GMSMarker alloc] init];
marker1.position = CLLocationCoordinate2DMake(currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
marker1.icon = [GMSMarker markerImageWithColor:[UIColor redColor]];
marker1.title = @"my location";
marker1.snippet = @"City Name";
marker1.map = self.mapView;


GMSMarker *marker2 = [[GMSMarker alloc] init];
marker2.position = CLLocationCoordinate2DMake(22.6990,75.8671);
marker2.icon = [GMSMarker markerImageWithColor:[UIColor greenColor]];
marker2.title = @"Destination location";
marker2.snippet = @"City Name";
marker2.map = self.mapView;

NSString *originString = [NSString stringWithFormat:@"%f,%f",currentLocation.coordinate.latitude, currentLocation.coordinate.longitude];

NSString *destinationString = [NSString stringWithFormat:@"%f,%f",22.6990,75.8671];

NSString *str = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false",originString,destinationString];
NSURL *url=[[NSURL alloc]initWithString:[str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]]];
NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSURLSessionDataTask * dataTask = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
    if(data == nil) {
        return;
    }else{
        NSDictionary* json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
        NSArray* latestRoutes = [json objectForKey:@"routes"];
        NSString *points=[[[latestRoutes objectAtIndex:0] objectForKey:@"overview_polyline"] objectForKey:@"points"];
        _text.text = points;
        @try {
            // TODO: better parsing. Regular expression?
            NSArray *temp= [self decodePolyLine:[points mutableCopy]];
            GMSMutablePath *path = [GMSMutablePath path];
            for(int idx = 0; idx < [temp count]; idx++){
                CLLocation *location=[temp objectAtIndex:idx];
                [path addCoordinate:location.coordinate];
            }
            // create the polyline based on the array of points.
            GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path];
            rectangle.strokeWidth=5.0;
            rectangle.strokeColor = [UIColor redColor];
            rectangle.map = self.mapView;

            [locationManager stopUpdatingLocation];
        }
        @catch (NSException * e) {
            // TODO: show erro
        }
    }
}];
[dataTask resume];

 [locationManager stopUpdatingLocation];

 }

GMSMapView image

Check my PolyLine IMAGE

Answer 1

I give you the solution step by step

STEP 1:

First we should get the Google Map SDK

Drag the following bundles into your project (when prompted, select Copy items if needed):

Subspecs/Base/Frameworks/GoogleMapsBase.framework
Subspecs/Maps/Frameworks/GoogleMaps.framework
Subspecs/Maps/Frameworks/GoogleMapsCore.framework

Right-click GoogleMaps.framework in your project, and select Show In Finder.

Drag the GoogleMaps.bundle from the Resources folder into your project. When prompted, ensure Copy items into destination group's folder is not selected.

Select your project from the Project Navigator, and choose your application's target.

Open the Build Phases tab, and within Link Binary with Libraries, add the following frameworks:

GoogleMapsBase.framework
GoogleMaps.framework
GoogleMapsCore.framework
GoogleMapsM4B.framework (Premium Plan customers only)
Accelerate.framework
CoreData.framework
CoreGraphics.framework
CoreLocation.framework
CoreText.framework
GLKit.framework
ImageIO.framework
libc++.tbd
libz.tbd
OpenGLES.framework
QuartzCore.framework
SystemConfiguration.framework
UIKit.framework

STEP 2:

Get the API key

STEP 3:

Add the below things in your Plist    

  App Transport Security Settings   Dictionary 
  Allow Arbitrary Loads             Boolean          YES


  <key>NSLocationWhenInUseUsageDescription</key>
  <string>RehabTask requires location services to work</string>

  <key>NSLocationAlwaysUsageDescription</key>
  <string>RehabTask requires location services to work</string>        

            OR

   Privacy - Location When In Use Usage Description   string    RehabTask requires location services to work
   Privacy - Location Always Usage Description        string    RehabTask requires location services to work

Also you need to add

  <key>LSApplicationQueriesSchemes</key>
  <array>
     <string>googlechromes</string>
     <string>comgooglemaps</string>
  </array>

STEP 4: In appDelegate add below code

AppDelegate.m

@import GoogleMaps;
#import "AppDelegate.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
   [GMSServices provideAPIKey:@"AIzaSyCrCEb7qVkURIjq6jsfkPkwgN62sfj6Ff0"];
   return YES;
}

STEP 5:

ViewController.h

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


@interface ViewController : UIViewController<CLLocationManagerDelegate,GMSMapViewDelegate>{
    CLLocation *currentLocation;
}

@property (strong, nonatomic) IBOutlet UIView *viewDirection;
@property (nonatomic, strong) CLLocationManager *locationManager;
@property (nonatomic, strong) GMSMapView *mapView;
@end

ViewController.m

#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize viewDirection,locationManager,
@synthesize mapView;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    locationManager = [[CLLocationManager alloc]init];
    locationManager.delegate = self;
    locationManager.distanceFilter = 10;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    if([CLLocationManager locationServicesEnabled] == NO){
        NSLog(@"Your location service is not enabled, So go to Settings > Location Services");
    }
    else{
        NSLog(@"Your location service is enabled");
    }
    if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
       [locationManager requestWhenInUseAuthorization];
    }
    [locationManager startUpdatingLocation];
}

#pragma mark - CLLocationManagerDelegate method
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
    currentLocation = [locations lastObject];
    if (currentLocation != nil){
        NSLog(@"The latitude value is - %@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude]);
        NSLog(@"The logitude value is - %@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude]);
    }
    //Current
    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:currentLocation.coordinate.latitude longitude: currentLocation.coordinate.longitude zoom:13];

    self.mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
    self.mapView.myLocationEnabled = YES;
    self.mapView.delegate = self;
    self.mapView.frame = viewDirection.bounds;
    [viewDirection addSubview:self.mapView];

    GMSMarker *marker = [[GMSMarker alloc] init];
    marker.position = CLLocationCoordinate2DMake(currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
    marker.title = @"Your Office Name";
    marker.icon = [UIImage imageNamed:@"boss-icon.png"];
                OR
    marker.icon = [GMSMarker markerImageWithColor:[UIColor blueColor]];
    marker.snippet = @"Current Location";
    marker.map = self.mapView;


    GMSMarker *marker1 = [[GMSMarker alloc] init];
    marker1.position = CLLocationCoordinate2DMake(22.7007,75.8759);
    marker1.icon = [GMSMarker markerImageWithColor:[UIColor redColor]];
    marker1.title = @"Place Name";
    marker1.snippet = @"City Name";
    marker1.map = self.mapView;


    GMSMarker *marker2 = [[GMSMarker alloc] init];
    marker2.position = CLLocationCoordinate2DMake(22.6990,75.8671);
    marker2.icon = [GMSMarker markerImageWithColor:[UIColor greenColor]];
    marker2.title = @"Place Name";
    marker2.snippet = @"City Name";
    marker2.map = self.mapView;

    NSString *originString = [NSString stringWithFormat:@"%f,%f",22.7007,75.8759];

    NSString *destinationString = [NSString stringWithFormat:@"%f,%f",22.6990,75.8671]; 

    NSString *str = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false",originString,destinationString];
    NSURL *url=[[NSURL alloc]initWithString:[str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]]];
    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
    NSURLSessionDataTask * dataTask = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if(data == nil) {
            return;
        }else{
            NSDictionary* json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
            NSArray* latestRoutes = [json objectForKey:@"routes"];
            NSString *points=[[[latestRoutes objectAtIndex:0] objectForKey:@"overview_polyline"] objectForKey:@"points"];
            @try {
                // TODO: better parsing. Regular expression?
                NSArray *temp= [self decodePolyLine:[points mutableCopy]];
                GMSMutablePath *path = [GMSMutablePath path];
                for(int idx = 0; idx < [temp count]; idx++){
                    CLLocation *location=[temp objectAtIndex:idx];
                    [path addCoordinate:location.coordinate];
                }
                // create the polyline based on the array of points.
                GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path];
                rectangle.strokeWidth=5.0;
                rectangle.map = self.mapView;
                [locationManager stopUpdatingLocation];
            }
            @catch (NSException * e) {
                // TODO: show erro
            }
        }
    }];
    [dataTask resume];
    }
    [locationManager stopUpdatingLocation];
}

//I called below method in above temp(NSArray *temp = [self decodePolyLine:[points mutableCopy]]) for Drawing route between two or more places
-(NSMutableArray *)decodePolyLine: (NSMutableString *)encoded {
    [encoded replaceOccurrencesOfString:@"\\\\" withString:@"\\"
                                options:NSLiteralSearch
                                  range:NSMakeRange(0, [encoded length])];
    NSInteger len = [encoded length];
    NSInteger index = 0;
    NSMutableArray *array = [[NSMutableArray alloc] init] ;
    NSInteger lat=0;
    NSInteger lng=0;
    while (index < len) {
        NSInteger b;
        NSInteger shift = 0;
        NSInteger result = 0;
        do {
            b = [encoded characterAtIndex:index++] - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        NSInteger dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
        lat += dlat;
        shift = 0;
        result = 0;
        do {
            b = [encoded characterAtIndex:index++] - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        NSInteger dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
        lng += dlng;
        NSNumber *latitude = [[NSNumber alloc] initWithFloat:lat * 1e-5] ;
        NSNumber *longitude = [[NSNumber alloc] initWithFloat:lng * 1e-5] ;
        printf("[%f,", [latitude doubleValue]);
        printf("%f]", [longitude doubleValue]);
        CLLocation *loc = [[CLLocation alloc] initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]] ;
        [array addObject:loc];
    }

    return array;
}

@end

Happy Coding :-)

Answer 2

Add following lines in your info.plist

<key>NSLocationWhenInUseUsageDescription</key>
    <string>App required location because it is needed when .... </string>

Also check that you added following line in your code

if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
    {
        [self.locationManager requestWhenInUseAuthorization];
    }

Answer 3

As suggested by others in their comments, you need one or 2 keys in your info.plist, and you need to ask the user for permission to use the GPS. See this link for the code:

Checking location service permission on iOS

The link below lists the keys you need to enter into your info.plist and the code you need, but the code is in Swift:

http://nshipster.com/core-location-in-ios-8/