带有 RestKit 0.20 的 Google 地理编码 API答案

【问题标题】：Google Geo Coding API with RestKit 0.20带有 RestKit 0.20 的 Google 地理编码 API
【发布时间】：2013-01-24 19:58:05
【问题描述】：

我想不出用一种优雅的方式解析这个响应。我正在尝试将不同的字段类型与包含以下属性的对象匹配。

@property (nonatomic) NSString *name;
@property (nonatomic) NSString *address;
@property (nonatomic) NSString *city;
@property (nonatomic) NSString *postalcode;
@property (nonatomic) NSString *district;
@property (nonatomic) NSString *country;

过去，我浏览了字典，子字段与我搜索的字段相匹配。

 {
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "10",
               "short_name" : "10",
               "types" : [ "street_number" ]
            },
            {
               "long_name" : "Warschauer Straße",
               "short_name" : "Warschauer Straße",
               "types" : [ "route" ]
            },
            {
               "long_name" : "Friedrichshain",
               "short_name" : "Friedrichshain",
               "types" : [ "sublocality", "political" ]
            },
            {
               "long_name" : "Friedrichshain-Kreuzberg",
               "short_name" : "Friedrichshain-Kreuzberg",
               "types" : [ "sublocality", "political" ]
            },
            {
               "long_name" : "Berlin",
               "short_name" : "Berlin",
               "types" : [ "locality", "political" ]
            },
            {
               "long_name" : "Berlin",
               "short_name" : "Berlin",
               "types" : [ "administrative_area_level_1", "political" ]
            },
            {
               "long_name" : "Germany",
               "short_name" : "DE",
               "types" : [ "country", "political" ]
            },
            {
               "long_name" : "10243",
               "short_name" : "10243",
               "types" : [ "postal_code" ]
            }
         ],
         "formatted_address" : "Warschauer Straße 10, 10243 Berlin, Germany",
         "geometry" : {
            "location" : {
               "lat" : 52.51329350,
               "lng" : 13.45246930
            },
            "location_type" : "ROOFTOP",
            "viewport" : {
               "northeast" : {
                  "lat" : 52.51464248029150,
                  "lng" : 13.45381828029150
               },
               "southwest" : {
                  "lat" : 52.51194451970850,
                  "lng" : 13.45112031970850
               }
            }
         },
         "types" : [ "street_address" ]
      }
   ],
   "status" : "OK"
}

【问题讨论】：

没有“优雅”的方式。只需对完整的 getter 进行硬编码，将它们映射到您在此处看到的 JSON。

标签： objective-c json google-maps ios6 restkit

【解决方案1】：

好的。我想出了以下解决方案。我已经定义了一个 Dictionary 并重写了 Setter 以将传入的字典解析到我自己的解析器中：

-(void)addressByGoogle: (NSDictionary*)newAddressComponents{

    for (NSArray *googleResult in newAddressComponents) {

        for (NSArray *fields in googleResult) {

            if ([[fields valueForKey:@"types"] count] >= 1) {

                NSString *googleType = [[fields valueForKey:@"types"] objectAtIndex:0];

                if ( [googleType isEqualToString:@"sublocality"]) {
                    self.district = [fields valueForKey:@"long_name"];
                }

                if ( [googleType isEqualToString:@"country"]) {
                    self.country = [fields valueForKey:@"long_name"];
                }

                if ( [googleType isEqualToString:@"locality"]) {
                    self.city = [fields valueForKey:@"long_name"];
                }

                if ( [googleType isEqualToString:@"street_number"]) {
                    self.streetnumber = [fields valueForKey:@"long_name"];
                }

                if ( [googleType isEqualToString:@"route"]) {
                    self.address = [fields valueForKey:@"long_name"];
                }

                if ( [googleType isEqualToString:@"postal_code"]) {
                    self.postalcode = [fields valueForKey:@"long_name"];
                }
                if ( [googleType isEqualToString:@"administrative_area_level_1"]) {
                    self.adminAreaLevel1 = [fields valueForKey:@"long_name"];
                }
                if ( [googleType isEqualToString:@"administrative_area_level_2"]) {
                    self.adminAreaLevel2 = [fields valueForKey:@"long_name"];
                }
            }

        }
    }

}

- (void) setAddressComponents:(NSDictionary *)newAddressComponents{
    [self addressByGoogle: newAddressComponents];
}

【讨论】：

【解决方案2】：

正如Jim 所说，没有使用 Restkit 映射此对象的优雅方法，您可以做的是将这种格式直接映射到一个“丑陋的对象”并将该对象与另一个具有接口的对象包装为您想要。

类似：

@interface MYMappedAddress : NSObject

@property (nonatomic) NSArray *addressComponents;
@property (nonatomic) NSArray *types;
@property (nonatomic) MYGeometry *geometry;
@property (nonatomic) NSString * formattedAddress;

@end

@interface MYAddress : MYMappedAddress

@property (nonatomic) NSString *name;
@property (nonatomic) NSString *address;
@property (nonatomic) NSString *city;
@property (nonatomic) NSString *postalcode;
@property (nonatomic) NSString *district;
@property (nonatomic) NSString *country;

@end

【讨论】：