Facing difficulty in parsing google location response - ios

Question

Using iOS 8.0.
I am using Google API for getting the location.and I want to reduce the coding using NSPredicate and KeyPath.
I am using below link for getting the google response,
iPhone - Get City name from Latitude and Longtiude
Using answer of user #'Constantin Saulenco'.
If I would a Sql developer I would write a query like,
1. (select address_components from MAIN_TABLE where types like 'postal_code') from this I will get NAME_TABLE rows.
2.select long_name from NAME_TABLE where types like 'locality'
For that I am using below code,After watching the #ztan's answer I have changed the coding like this
Edit: Answer
NSArray *addressArray = json[#"results"];
NSPredicate *predicateForTypes=[NSPredicate predicateWithFormat:#"(types CONTAINS 'postal_code')"];
addressArray=([addressArray filteredArrayUsingPredicate:predicateForTypes][0])[#"address_components"];
NSPredicate *predicateForCity=[NSPredicate predicateWithFormat:#"(types CONTAINS 'locality')"];
NSString *cityName=([addressArray filteredArrayUsingPredicate:predicateForCity][0])[#"long_name"];
I have below JSON...
{
"address_components" = (
{
"long_name" = 221;
"short_name" = 221;
types = (
"street_number"
);
},
{
"long_name" = "Juniper Drive";
"short_name" = "Juniper Dr";
types = (
route
);
},
{
"long_name" = "North Kingstown";
"short_name" = "North Kingstown";
types = (
locality,
political
);
},
{
"long_name" = "Washington County";
"short_name" = "Washington County";
types = (
"administrative_area_level_2",
political
);
},
{
"long_name" = "Rhode Island";
"short_name" = RI;
types = (
"administrative_area_level_1",
political
);
},
{
"long_name" = "United States";
"short_name" = US;
types = (
country,
political
);
},
{
"long_name" = 02852;
"short_name" = 02852;
types = (
"postal_code"
);
},
{
"long_name" = 4308;
"short_name" = 4308;
types = (
"postal_code_suffix"
);
}
);
"formatted_address" = "221 Juniper Drive, North Kingstown, RI 02852, USA";
geometry = {
location = {
lat = "41.577761";
lng = "-71.468383";
};
"location_type" = ROOFTOP;
viewport = {
northeast = {
lat = "41.5791099802915";
lng = "-71.46703401970849";
};
southwest = {
lat = "41.5764120197085";
lng = "-71.4697319802915";
};
};
};
"place_id" = ChIJ563yzFex5YkRujoi28Fvzvo;
types = (
"street_address"
);
},
{
"address_components" = (
{
"long_name" = "North Kingstown";
"short_name" = "North Kingstown";
types = (
locality,
political
);
},
{
"long_name" = "Washington County";
"short_name" = "Washington County";
types = (
"administrative_area_level_2",
political
);
},
{
"long_name" = "Rhode Island";
"short_name" = RI;
types = (
"administrative_area_level_1",
political
);
},
{
"long_name" = "United States";
"short_name" = US;
types = (
country,
political
);
}
);
"formatted_address" = "North Kingstown, RI, USA";
geometry = {
bounds = {
northeast = {
lat = "41.6549521";
lng = "-71.4023083";
};
southwest = {
lat = "41.497126";
lng = "-71.52244109999999";
};
};
location = {
lat = "41.5568315";
lng = "-71.4536835";
};
"location_type" = APPROXIMATE;
viewport = {
northeast = {
lat = "41.6549521";
lng = "-71.4023083";
};
southwest = {
lat = "41.497126";
lng = "-71.52244109999999";
};
};
};
"place_id" = "ChIJgWUP-V-x5YkRO7Zie7NXWsI";
types = (
locality,
political
);
},2nd JSON Object, 3rd JSON Object ,......,....
My question is How to Reduce the coding ? Using NSPRedicates and KeyPath ..
This is how can we brake the problems......I have mentioned this in #ztan's answer, please have a look, It would be beneficial.
please see my second comment.......:)

Answer 1

You can do the following:
NSArray *addressArray = resultDict[#"results"];
NSPredicate *predicateFromTypes=[NSPredicate predicateWithFormat:#"(types CONTAINS 'postal_code') AND (types CONTAINS 'locality')"];
NSLog(#"\n%#", [addressArray[0][#"address_components"] filteredArrayUsingPredicate:predicateFromTypes][0][#"long_name"]);

Answer 2

try this
NSArray *filtered = [YOURARRAY filteredArrayUsingPredicate:
[NSPredicate predicateWithFormat:#"(types == %#)", #"locality "]];