currentCenter возвращения ноля прошивки при использовании JSon

Question

JSON данные

Пожалуйста, помогите умоляю

2015-10-30 12:15:58.866 GooglePlaces[17141:989254] Google Data: (
    { 
     geometry =   { 
      location =    { 
       lat = "55.599881"; 
       lng = "-2.64616"; 
      }; 
     }; 
     icon = "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png"; 
     id = 4e3047fc80549f89389827d05fb89a999705fcf2; 
     name = "Scott's view"; 
     photos =   (
         { 
       height = 2368; 
       "html_attributions" =     (
        "<a href=\"https://maps.google.com/maps/contrib/113818044483598102211\">Clarke Thomas</a>" 
       ); 
       "photo_reference" = "CmRdAAAADgCHDAr9O_RZg24-kHykYexBOTpKfhOAWTV-K1Go-sn6CGUoikhGc3beyjErYvXzCPLwFLRr32lC8tPpgfIA-CXue6l75ziHrlRXMOt72IZFBcbZfCBSSbttW5lHjSdfEhD5d08GC5Myl8L1_Zs0VmW2GhTzCD7bh_klEqsROxGDZLvskhzaBw"; 
       width = 3200; 
      } 
     ); 
     "place_id" = ChIJP5eCRF54h0gR9nc97bjfO8k; 
     rating = "4.7"; 
     reference = "CmRgAAAAfN6yeOvYQEeRAzOcidZiE83kPoIdw_vDDH7orFr3gbZVXHeb3prAMlOCVWnVqeeK786c8x-V1QUtWfpSn-50Bk4Q5lO7fY04cNLsXigf1nx1JWiTee5d4TdKI1ij-jGDEhDXYtJPM_1H5t9KhqdSJiyuGhQAXqV2rosfllEOfE-suQ_ur89Bmg"; 
     scope = GOOGLE; 
     types =   (
      parking, 
      "point_of_interest", 
      establishment 
     ); 
     vicinity = B6356; 
    }, 
     { 
     geometry =   { 
      location =    { 
       lat = "55.756977"; 
       lng = "-4.17221"; 
      }; 
     }; 
     icon = "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png"; 
     id = 481f927c8ea30c24ae902a14dd85efd7e2bae1d1; 
     name = "Kwik Fit"; 
     "opening_hours" =   { 
      "open_now" = 1; 
      "weekday_text" =    (
      ); 
     }; 
     photos =   (
         { 
       height = 608; 
       "html_attributions" =     (
        "<a href=\"https://maps.google.com/maps/contrib/118136503820442451002\">Kwik Fit</a>" 
       ); 
       "photo_reference" = "CmRdAAAAY152xIVsahSMoZgsMMN1IdIlMq6fbPeMCJ_1feXg1BIOhRTaW-s_wauDF8WSVPXnOG4dOR3nE9fLzqHmTmdoyKIAef_tZVFKOK43880DeItFOKNejmt_QaEamB4nX8uvEhCPQYbVi8day5vi1KSzGPFtGhT8KzkGs_FuA5ZM11lydRplhPM8uA"; 
       width = 1080; 
      } 
     ); 
     "place_id" = "ChIJ1zdwq2s_iEgR1fI1QvrsCas"; 
     reference = "CmRcAAAAkkARPnw1ApSjDPECBxsmTmcDDr5LESbSAWF0aNPvI2rX8BDJGfUj3dytKOotK2IbsCUaFbbhYZ8mgoDXfvYqtGliy2v06F2CarEAPSfD_25BGRYqUBsNKYiO05c-seGUEhDsuTEEt6PPKoZhmkBkj2VFGhQ-5vq-S7o73KmF2zw-MIJsPpWYgg"; 
     scope = GOOGLE; 
     types =   (
      store, 
      parking, 
      "car_repair", 
      "point_of_interest", 
      establishment 
     ); 
     vicinity = "1 Telford Road, East Kilbride"; 
    }, 
     { 
     geometry =   { 
      location =    { 
       lat = "55.618894"; 
       lng = "-2.810683"; 
      }; 
     }; 
     icon = "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png"; 
     id = 8ec3c7e9dc0da1d102d516107178cd440579ecff; 
     name = "Kwik-Fit"; 
     "opening_hours" =   { 
      "open_now" = 1; 
      "weekday_text" =    (
      ); 
     }; 
     photos =   (
         { 
       height = 608; 
       "html_attributions" =     (
        "<a href=\"https://maps.google.com/maps/contrib/102672183870059691928\">Kwik-Fit</a>" 
       ); 
       "photo_reference" = "CmRdAAAAfbp51L51v3Mz4STPTBbUPvSy8b0GW_PYHQMcP6kXBDKIqhANAnVJINu3mdJk4mrEnG8-RSmR9SBa59z9qjRSxIVSEJapVWMSgGZzLHC3EVnib3-P3n1PnJyewKHVzR2tEhC5qWkLkJlXZl-6ETTap3GZGhSZCS6Wm9jEVAHx0nHwMTi6TNkVsw"; 
       width = 1080; 
      } 
     ); 
     "place_id" = ChIJqf1X7LyEh0gRK7GrZbR1qlI; 
     reference = "CmRbAAAAoIW6Uer6wFdg9f9c_kRg0s5Wc-6wyUwg49CWQtn9hphJTfCqmidaP_unuejhxZBS_hChwfTHYWsspU7nOOFZx08cmzQ9bAW7cTp1N7vxepNfqR1YNybBBtB4romQAZO7EhCfxI62ia7XGtVPIyEPRSIPGhR4HnxB4lrDp1o4daDSipUAvFoG4Q"; 
     scope = GOOGLE; 
     types =   (
      store, 
      parking, 
      "car_repair", 
      "point_of_interest", 
      establishment 
     ); 
     vicinity = "Bridge Street, Galashiels"; 
    }, 
     { 
     geometry =   { 
      location =    { 
       lat = "55.827528"; 
       lng = "-4.041783"; 
      }; 
     }; 
     icon = "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png"; 
     id = 993dd6caf6e87b27c95b597170f82fc535db8464; 
     name = "Scania Truck Rental"; 
     photos =   (
         { 
       height = 416; 
       "html_attributions" =     (
        "<a href=\"https://maps.google.com/maps/contrib/111565851399356378888\">Ian McCully</a>" 
       ); 
       "photo_reference" = "CmRdAAAAgxB25gl4CRnm6PENE9QPRq0WqPqIFUQCrvz7eOWsirTLMLZM_3gd_plKy9teW9AQdDIIZ3Ikmz96ADPiPD-wtDRvjDFMZl274q1HuA4zg8gVNi6QggypXkSPDdOdrfxUEhCf_qaIvJK0_iWgvnmT-TjcGhSRvsf9XiE5hkqcgwQdbKTm7oI5FA"; 
       width = 640; 
      } 
     ); 
     "place_id" = "ChIJ0YTxdlVqiEgRlNZz-R6gs9M"; 
     reference = "CnRnAAAAGNBVd-2Rzx_pF8lzxZ5WsI1qC8752BhlsKAXwS36PkmNVCZ4VQkH2FjmRDJ3swxoGLfJ0YmG4Cr1MACDFNaPSv0QdBo5zjIXQyRfytk77g2g0XVspPR7IhO9mQpuQHNCA-DDp5m1ph_ry1W3kt8IahIQiW-loOYmR9yACbxLie-eyhoUQF04W9ZNAeasiM5OqTqPlyDn6g8"; 
     scope = GOOGLE; 
     types =   (
      parking, 
      "car_repair", 
      "point_of_interest", 
      establishment 
     ); 
     vicinity = "Melford Road, Bellshill"; 
    }, 
     { 
     geometry =   { 
      location =    { 
       lat = "55.778158"; 
       lng = "-4.053103"; 
      }; 
     }; 
     icon = "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png"; 
     id = 5b4e2e7beef36bc21e795144d512adb9cbc9ba54; 
     name = "National Tyres and Autocare"; 
     "opening_hours" =   { 
      "open_now" = 1; 
      "weekday_text" =    (
      ); 
     }; 
     photos =   (
         { 
       height = 631; 
       "html_attributions" =     (
        "<a href=\"https://maps.google.com/maps/contrib/100159584019554234022\">National Tyres and Autocare</a>" 
       ); 
       "photo_reference" = "CmRdAAAALn7YnxOv_yKF3Sfkau09mJ1T7aY_L7La0E_2dxN9AGndS6evIYUPWCvYrQgSxD6Y69IsdGhkh08iY4gX0-YgXrbdtD0OBW6y8AjwVjYA34FLAAH9c122Kr_ImAGAmogREhDUOxeBxKmpZPcawyxxfnC9GhTJNNzPhS1xvgh_XPBXGOdhFhFgpQ"; 
       width = 789; 
      } 
     ); 
     "place_id" = ChIJrVjMcTMViEgRqc4gOlJfoDs; 
     reference = "CnRuAAAAoOOZVebI5pz8rifXu3_n9RbZv0sobjodbPcP1DhknZcwTuZ_zCjch7l3D0tPqSO21S4wQlhYuH6tOrgBzHwkYBcRMS2-XP5r234IevwkdYV04gAk4BPBfuJMQIyrvASsDtRN9LJkPp8By7OleSyyqhIQco-kf732PwomY9loLvEtbBoUc2ZZKVbvMIYk0pVeFQronor3UM8"; 
     scope = GOOGLE; 
     types =   (
      store, 
      parking, 
      "car_repair", 
      "point_of_interest", 
      establishment 
     ); 
     vicinity = "Peacock Cross, Almada Street, Hamilton"; 
    } 

2015-10-30 12:16:05.573 GooglePlaces[17141:989254] name Yosemite National Park 

Файл заголовка Где currentCenter определяется

#import <UIKit/UIKit.h> 
    #import <MapKit/MapKit.h> 
    #import <CoreLocation/CoreLocation.h> 
    #define kGOOGLE_API_KEY @"the key here" 

    @interface AboutPlaceViewController : UIViewController <MKMapViewDelegate , CLLocationManagerDelegate> 
    { 
     CLLocationManager *locationManager; 
     CLLocation *location; 
// Where Current Centre is defined 
     CLLocationCoordinate2D currentCentre; 
     int currenDist; 
     BOOL firstLaunch; 

    } 

    @property (weak, nonatomic) IBOutlet UILabel *placeLabell; 

    @end 

файл по выполнению

#import "AboutPlaceViewController.h" 
#import "ViewController.h" 

@interface AboutPlaceViewController() 

@end 

@implementation AboutPlaceViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    locationManager = [[CLLocationManager alloc]init]; 
    locationManager.delegate = self; 
    [locationManager setDistanceFilter:kCLDistanceFilterNone]; 
    [locationManager setDesiredAccuracy:kCLLocationAccuracyBest]; 
    [locationManager startUpdatingLocation]; 
    location = [locationManager location]; 
    //Do any additional setup after loading the view. 
    NSDictionary *jsonDic = [[NSDictionary alloc]init]; 
    [self getApiResponse:&jsonDic]; 
    NSLog(@"jsonDic %@",jsonDic); 
    NSDictionary *resultDic = [jsonDic[@"results"] objectAtIndex:0]; 
    NSString *name = resultDic[@"name"]; 
    NSLog(@" name %@", name); 
    self.placeLabell.text = name; 
} 
-(void)getApiResponse:(NSDictionary**)dataDictionary 
{ 
    // Where i dig into the Json array one example provided above 
    NSDictionary *responseDict = [[NSDictionary alloc]init]; 
    responseDict = [responseDict valueForKey:@"geometry"]; 
    NSArray *responseArray = [responseDict valueForKey:@"location"]; 
    NSDictionary *dict; 
    // The for loop it doesnt go inside the for loop when debugging 
    for(int i = 0; i< [responseDict count]; i++){ 
     dict = [responseArray objectAtIndex:i]; 
     NSLog(@"- %@",[responseArray objectAtIndex:i]); 
    } 
    // Where I declare but it returns nil :(
    currentCentre.latitude = [dict[@"lat"]doubleValue]; 
    currentCentre.longitude = [dict[@"lng"]doubleValue]; 

    NSString *api_key = kGOOGLE_API_KEY; 
    NSString *urlString = [NSString stringWithFormat:@"https://maps.googleapis.com/maps/api/place/search/json?location=%f,%f&radius=50&types=%@&sensor=true&key=%@",currentCentre.latitude , currentCentre.longitude,[NSString stringWithFormat:@"%i", currenDist],api_key]; 
    NSURL *url = [NSURL URLWithString:urlString]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:url]; 
    NSURLResponse *response; 
    NSError *error = nil; 
    NSData *data = [NSURLConnection sendSynchronousRequest: 
        request returningResponse:&response error:&error]; 

    NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; 

    dataDictionary = [[NSDictionary alloc]initWithDictionary:jsonObject copyItems:YES]; 
} 


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

Ответ Respict и responseArray также возвращают нуль.

CurrentCenter возвращает нуль, и когда я отлаживаю код, он не переходит в цикл for. Я заглянул в формат json, чтобы найти.

Answer 1

Сначала на все: Вы имеете следующую строку:

location = [locationManager location]; 

You call the location straight after you initialise the manager. 
If you look at the location method description it says: 

/* 
* location 
* 
* Discussion: 
*  The last location received. Will be nil until a location has been received. 
*/ 
@property(readonly, nonatomic, copy, nullable) CLLocation *location; 

т.е. вы должны ждать до первого места было получено. Ваш класс должен реализовать CLLocationManagerDelegate и переопределение:

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations 

Убедитесь, что вы requestAlwaysAuthorization, прежде чем получить доступ к местоположению пользователя

Кроме того, Что вы пытаетесь сделать в этом направлении?

NSDictionary *responseDict = [responseDict valueForKey:@"geometry"]; 

Вы в основном определяете словарь и используете его сразу.

Answer 2

Anamica в первую очередь вам необходимо правильно определить значение широты и долготы. Если вы не получите этого, вы не сможете получить другие данные, передав значения широты и долготы.

Получение широты и долготы от вашего ответа

NSString *lataddr=[[[responseDict objectForKey:@"geometry"]objectForKey:@"location"]objectForKey:@"lat"]; 
NSString *longaddr=[[[responseDict objectForKey:@"geometry"]objectForKey:@"location"]objectForKey:@"lng"]; 

Затем передайте эти строки в ваш url.Now вы можете получить ответ без нуля.

Также удалите ниже кодирования с вашей стороны

NSArray *responseArray = [responseDict valueForKey:@"location"]; 
NSDictionary *dict; 
// The for loop it doesnt go inside the for loop when debugging 
for(int i = 0; i< [responseDict count]; i++){ 
    dict = [responseArray objectAtIndex:i]; 
    NSLog(@"- %@",[responseArray objectAtIndex:i]); 
} 
// Where I declare but it returns nil :(
currentCentre.latitude = [dict[@"lat"]doubleValue]; 
currentCentre.longitude = [dict[@"lng"]doubleValue]; 

вместо этих части, вам нужно добавить

NSString *lataddr=[[[responseDict objectForKey:@"geometry"]objectForKey:@"location"]objectForKey:@"lat"]; 
NSString *longaddr=[[[responseDict objectForKey:@"geometry"]objectForKey:@"location"]objectForKey:@"lng"]; 

currentCentre.latitude = [lataddr doubleValue]; 
currentCentre.longitude = [longaddr doubleValue]; 

Приведенный выше код для получения только одного значения широты и долготы.

Теперь, если вы хотите получить несколько значений широты и долготы для отображения на карте

NSMutableArray *arrayLat = [[NSMutableArray alloc]init]; 
NSMutableArray *arrayLng = [[NSMutableArray alloc]init]; 
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:nil]; //This is for actually you are getting response to dict. 
NSArray *arrayResponse = [dict copy]; 
NSLog(@"The response is - %@",arrayResponse); 
for(int i=0;i<[arrayResponse count];i++) 
{ 
    NSString *lataddr=[[[[[arrayResponse objectAtIndex:i]valueForKey:@"geometry"]valueForKey:@"location"]valueForKey:@"lat"]; 
    NSString *longaddr=[[[[[arrayResponse objectAtIndex:i]valueForKey:@"geometry"]valueForKey:@"location"]valueForKey:@"lng"]; 

    [arrayLat addObject:lataddr]; 
    [arrayLng addObject:longaddr]; 
} 
for(int j=0;j<[arrayLat count];j++) 
{ 
    currentCentre.latitude = [[arrayLat objectAtIndex:j] doubleValue]; 
    currentCentre.longitude = [[arrayLng objectAtIndex:j] doubleValue]; 
    NSString *api_key = kGOOGLE_API_KEY; 
    NSString *urlString = [NSString stringWithFormat:@"https://maps.googleapis.com/maps/api/place/search/json?location=%f,%f&radius=50&types=%@&sensor=true&key=%@",currentCentre.latitude , currentCentre.longitude,[NSString stringWithFormat:@"%i", currenDist],api_key]; 
    NSURL *url = [NSURL URLWithString:urlString]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:url]; 
    NSURLResponse *response; 
    NSError *error = nil; 
    NSData *data = [NSURLConnection sendSynchronousRequest: 
       request returningResponse:&response error:&error]; 

    NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; 

    dataDictionary = [[NSDictionary alloc]initWithDictionary:jsonObject copyItems:YES]; 

} 

Все лучшее Anamica :-)

Answer 3

NSDictionary *responseDict = [[NSDictionary alloc]init]; 
responseDict = [responseDict valueForKey:@"geometry"]; 

Эти две строки кода сущие пустяки.Бросьте все мысли о том, что вы думаете, что они делают, линии должны делать, но посмотрите на них и выясните, что они делают. Как код responseDict может быть чем-то другим, кроме nil после выполнения этих двух строк?

Answer 4

Как я нашел (если я прав) вы пытаетесь извлечь значения из сервера данных данных сына.

Вы можете использовать NSJsonSerilazation для получения данных из NSData. Ниже только демонстрационный код для получения значений

NSData *yourDataFromServer; 
    NSError*error; 
    id records= [NSJSONSerialization JSONObjectWithStream:yourDataFromServer options:NSJSONReadingMutableContainers error:&error]; 
    if (error!=nil) 
    { 
     if ([records isKindOfClass:[NSArray class]]) //Since you are getting Array Of Dictionary 
     { 
      NSDictionary *dictAtZeroIndex = records[0]; 
      NSDictionary *latLonDict= [dictAtZeroIndex valueForKey:@"geometry"]; //Again it will be a dictionary. For safety, Here you can again check wheter you are getting dictionary or array using "isKindOfClass" 

     } 
    } 
    else{ 
     NSLog(@"error is :%@",error.localizedDescription); 
    } 

«yourDataFromServer» является NSData объект приходит от сервера. Может быть полезно. Дайте мне знать, если у вас возникнут какие-либо вопросы. Используйте значениеForKey с «latLonDict» для получения значений lat-lon.