JSON数据
请帮助我求求
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
头文件 其中定义了currentCenter
#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
实施文件
#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.
}
responseDict和responseArray也返回nil。
currentCenter返回nil，当我调试代码时，它不会进入for循环。我已经研究了json格式来查找。
答案 0 :(得分：0)
首先： 您有以下一行：
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;
I.E您应该等到收到第一个地点。 您的类需要实现CLLocationManagerDelegate并覆盖：
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
确保在访问用户位置之前请求AlwaysAuthorization
此外， 你想在这条线上做什么？
NSDictionary *responseDict = [responseDict valueForKey:@"geometry"];
您基本上是在定义字典并立即使用它。
答案 1 :(得分：0)
Anamica首先你需要正确地获得纬度和经度值。如果你没有得到它，你就不能通过传递纬度和经度值来获得其他细节。
从您的回复中获取纬度和经度值
NSString *lataddr=[[[responseDict objectForKey:@"geometry"]objectForKey:@"location"]objectForKey:@"lat"];
NSString *longaddr=[[[responseDict objectForKey:@"geometry"]objectForKey:@"location"]objectForKey:@"lng"];
然后将这些字符串传递给你的url.Now你可以在没有nil的情况下得到答案。
另请从您的部分删除以下编码
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];
而不是这些部分，您需要添加
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];
以上代码仅获取单纬度和经度值。
现在，如果您想获得多个纬度和经度值，以便在地图中显示
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];
}
所有最好的Anamica： - ）
答案 2 :(得分：0)
NSDictionary *responseDict = [[NSDictionary alloc]init];
responseDict = [responseDict valueForKey:@"geometry"];
这两行代码完全是胡说八道。扔掉任何想到你认为这些行应该做什么的想法，但看看它们并弄清楚它们在做什么。在执行这两行之后，代码responseDict如何可能是nil以外的任何东西？
答案 3 :(得分：0)
正如我发现的那样（如果我是对的）你正在尝试从子数据表单服务器获取值。
您可以使用NSJsonSerilazation从NSData获取数据。以下只是获取值的演示代码
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);
}