NSJSONSerialization with google API - iphone

Question

When I'm getting request from google maps API i use this method to get json:
NSDictionary *jsonArray = [NSJSONSerialization JSONObjectWithData:dataRequest options: NSJSONReadingAllowFragments error: nil];
jsons look's like this one:
{
routes = (
{
bounds = {
northeast = {
lat = "50.90961";
lng = "20.6492";
};
southwest = {
lat = "50.05775000000001";
lng = "19.94544";
};
};
copyrights = "Dane do Mapy \U00a92012 Google";
legs = (
{
distance = {
text = "126 km";
value = 126118;
};
duration = {
text = "2 godz. 0 min";
value = 7229;
};
"end_address" = "Aleja Powstania Warszawskiego 15, 30-001 Krak\U00f3w, Polska";
"end_location" = {
lat = "50.06";
lng = "19.9589";
};
"start_address" = "Mas\U0142owska 2, 25-001 Kielce, Polska";
"start_location" = {
lat = "50.88884";
lng = "20.6492";
};
steps = (
{
distance = {
text = "0,1 km";
value = 109;
};
duration = {
text = "1 min";
value = 39;
};
"end_location" = {
lat = "50.88824";
lng = "20.64796";
};
"html_instructions" = "Kieruj si\U0119 <b>Mas\U0142owska</b> na <b>po\U0142udniowy zach\U00f3d</b> w stron\U0119 <b>Szyd\U0142\U00f3wek G\U00f3rny</b>";
polyline = {
points = "gfruHo``}BvBvF";
};
"start_location" = {
lat = "50.88884";
lng = "20.6492";
};
"travel_mode" = DRIVING;
},
{
distance = {
text = "0,2 km";
value = 221;
};
duration = {
text = "2 min";
value = 97;
};
"end_location" = {
lat = "50.88896";
lng = "20.64503";
};
"html_instructions" = "Skr\U0119\U0107 <b>w prawo</b> w <b>Szyd\U0142\U00f3wek G\U00f3rny</b>";
polyline = {
points = "obruHwx_}BaCpOMv#";
};
"start_location" = {
lat = "50.88824";
lng = "20.64796";
};
"travel_mode" = DRIVING;
},
{
distance = {
text = "0,6 km";
value = 596;
};
duration = {
text = "1 min";
value = 56;
};
"end_location" = {
lat = "50.88427";
lng = "20.64091";
};
"html_instructions" = "Skr\U0119\U0107 <b>w lewo</b> w <b>Warszawska</b>";
polyline = {
points = "_gruHmf_}BrGvFjQ`OhA|#";
};
"start_location" = {
lat = "50.88896";
lng = "20.64503";
};
"travel_mode" = DRIVING;
},
{
distance = {
text = "1,0 km";
value = 950;
};
duration = {
text = "2 min";
value = 104;
};
"end_location" = {
lat = "50.88779";
lng = "20.62863";
};
"html_instructions" = "Skr\U0119\U0107 w drug\U0105 <b>w prawo</b> w kierunku <b>Jesionowa</b>";
polyline = {
points = "uiquHul~|BiEvScCzKs#xCmBhK_#dD}#dIk#tBYr#Mf#Op#MnA";
};
"start_location" = {
lat = "50.88427";
lng = "20.64091";
};
"travel_mode" = DRIVING;
},
{
distance = {
text = "4,2 km";
value = 4185;
};
duration = {
text = "5 min";
value = 292;
};
"end_location" = {
lat = "50.90806000000001";
lng = "20.58021";
};
"html_instructions" = "Na rondzie zjazd nr <b>1</b> w <b>\U0141\U00f3dzka</b>";
polyline = {
points = "u_ruH}_||BCd#Cf#?N#RDPHJJHsBzQIl#OrAm#bEEV[vBa#fBUfA_A~Bk#jA}DvGyDpEu#fAsA`C_AhBeAlCmAhDgAnDuAvEwAzFyAvGgA|F]bDH`Ba#fCQjA]tBi#hC}#zDsB|GeBdDwD|Gg#~#cAhBGJ_H`Mo#jAiB`DaAlBcBfD_#`A[fACDuCrMcC`L?#{AhHw#rDiDhPSx#e#dBc#vAa#fAi#jAgCfF{#rAe#p#A#m#p#kBhB";
};
"start_location" = {
lat = "50.88779";
lng = "20.62863";
};
"travel_mode" = DRIVING;
},
{
distance = {
text = "0,2 km";
value = 213;
};
duration = {
text = "1 min";
value = 54;
};
"end_location" = {
lat = "50.90968";
lng = "20.57859";
};
"html_instructions" = "Kontynuuj wzd\U0142u\U017c <b>Trasa 74</b>";
polyline = {
points = "k~uuHiqr|BkBzAiEtEMP";
};
"start_location" = {
lat = "50.90806000000001";
lng = "20.58021";
};
"travel_mode" = DRIVING;
},
{
distance = {
text = "92,8 km";
value = 92776;
};
duration = {
text = "1 godz. 17 min";
value = 4641;
};
"end_location" = {
lat = "50.24777";
lng = "20.08501";
};
"html_instructions" = "Skr\U0119\U0107 <b>w lewo</b> w <b>E77</b>";
......
status = OK;
}
Next i use this method to get value for "points" key:
NSArray *items = [jsonArray valueForKeyPath:#"routes.legs.steps.polyline.points"];
When i want to print arrays elements it give only one element (it's strange because i have 25 points in json), and result looks like this one:
(
(
"gfruHo``}BvBvF",
"obruHwx_}BaCpOMv#",
"_gruHmf_}BrGvFjQ`OhA|#",
"uiquHul~|BiEvScCzKs#xCmBhK_#dD}#dIk#tBYr#Mf#Op#MnA",
"u_ruH}_||BCd#Cf#?N#RDPHJJHsBzQIl#OrAm#bEEV[vBa#fBUfA_A~Bk#jA}DvGyDpEu#fAsA`C_AhBeAlCmAhDgAnDuAvEwAzFyAvGgA|F]bDH`Ba#fCQjA]tBi#hC}#zDsB|GeBdDwD|Gg#~#cAhBGJ_H`Mo#jAiB`DaAlBcBfD_#`A[fACDuCrMcC`L?#{AhHw#rDiDhPSx#e#dBc#vAa#fAi#jAgCfF{#rAe#p#A#m#p#kBhB",
"k~uuHiqr|BkBzAiEtEMP",
"ohvuHegr|Bl#rCN`#Xf#n#h#xAx#hAz#nAdCtFdf#~Dv]~Ipu#zHpq#hAjIpA`JhBbJ`CxJjC~IfDlK`AtCfAvCfCdGdGhKpB|CvD`F`D|D~BzBhFbF`DvCjDhC`DdBtFtC|EtBxSjIfAd#|ErBzB~#~InDtX`KjDzArBz#|[dLvYpKzLdF`FnB~E|BrDfCbCxBjClChAjAfAhAbArALPf#r#j#`Ah#dApAfCx#~A~AfDrAlDtAbFrDpOb#rBvBrJj#`Bx#~BlAdDpClEfCrDhF~EhEnD|DvD~BjC~DzFnBfChVj_#|EbIbCvDpCfExY`d#lKbPnE~FfEbEhErCbB|#pBt#zEfAfCXpBHrB?zAK`BUhB[nAa#zAi#|As#p#]l#a#z#i#|AmAhAcAd#e#`AoArAiBdBqChBkDv#gBhBwEXs#Z{#t#sBvDaKnB{E|BmF|AsCbC{DrAkBxBiCnCqCfBwAvCmBTMd#Wv#e#dAg#z#a#hAa#^K\\M~#Y~A]zAWtAQTCzBStBElADH#nCHfAJ|#JnAR|#PdAX~Bp#dBd#~GnCd#R|GvCnInDjOlG`E|APFbDxAdCjBfF`F|A`BhCnDnElJlEdLbY`t#~Svi#vB`FrAbBbArArBpBhBjAn~#j[bAv#n#|#rGlOtEbLdDbHvC`GzBnDzCzEzBnD|BdF~#`EXfDRxDjArV^jGd#zBx#pC~#fBrBrBhN`LzRvO|U~QrNhLzSxO|WnSnOhN|I~GhDhBdFzAtBx#fBhAbDvB`CjC~BbDrDlJlJh[hP~i#vAxD`AhArJtJ`d#`b#|JhJr_Av{#bIdHtD`DpW`OhSvKfP|IvEbDbx#vo#r^vYjBhBnEjEfBnBrl#bv#fEbF~Wt\\tDxE|I|K`KhMHXjB~BdBjBnBpBzArApA`AlAx#pA|#|#f#fAj#~Ar#tAj#tAf#vA`#vA\\~Bh#bFhA`HvAbGlAjEz#|EbA~KzBtMpChE~#H#HBbDr#vE~#n#LPDt#NnB^~A\\n#NpDt#VFB#b#Hz#PjAVhCn#TFhA^PJPE`#PtAr#|AbAr#f#hA|#x#t#z#z#dAnAx#dAr#`Ah#x#f#~#v#tAr#`Bv#jBn#bB?B`#nABHV|#Nf#Rx#FRh#bCVrAZhBVdBR`BRpBPzBNzBJfC`#xJp#nRd#pM`#pK\\~Jf#jMNlEA^DjAPvBRrBR|A\\nB\\xAXpA`#xAf#|Al#`Bj#pAl#lAx#rALFl#~#rBrCtHzJ|Vt\\rBnCbo#zy#jQbUtTdYdArA|Z``#zPbUbGzIpRrV|f#nn#pVd[rL`PrTvXnF~G|Zxa#hWj]pIpKna#`h#lB~Dba#pIxHzA~o#fMlADxEbAfW~Frd#nJbE`AhGmA`S}KfFsCdNmHdAKjDW~DMtDdAtDjDlBvB~BhCnElHnCzDdBhBpOpTzJlKfJvDrtA|UjATnv#zM`pAp\\xDjAxE`AdFbAb]lg#vXpa#vApJaCvj#jAlNjF~JbdA~q#xRxLbF~C|JvDzEhBfUlMv]|R|[~RpVhOdMt`#nQrXtEhNh^na#`O`JfJvFh]fo#``#lt#tMjXlAjPYfGqEhVeDjLArMfWf~A`#|#x#fBdUhQnD`FjKvZ~BzGjGjGrOTpq#fAxCDdDDP?N?l#Bl#BzAFzAHN#N#J#H?x#Dx#DhAFfAHF?H?p#Hp#H|#H|#JtAPvAPhAPhANp#Fn#Dh#Bj#D~GA`HCjAGjAIjD#jD#\\RZPrB#pB?dC#dCBTORQJ#J?xANxAPf#Lh#Np#Rp#Rz#Zx#XdAh#dAj#j#^h#^t#j#t#l#r#l#r#n#l#n#j#n#^f#`#h#`AnA~#pAv#nAv#pAbArBbApBt#tAt#tAZf#\\h#d#j#f#j#HHHFPRPPb#\\d#\\h#`#j#`#x#^x#^n#Tn#R~#V~#VfDLfDL~DN|DPpBHpBFd#Bb##fBHfBFfBFdBFH?zHRxKXdu#dDxRqOzM}D~MaE~c#yM`vAle#jNkNrGsGlAsBn#gD|#gVtAsK|GmP|^ce#~LsO`v#k`At`#{`#xT{Tz#y#|lAmjAdTv#jBvBnAbLF`#L^",
"q_uqHizqyBHRJPV^b#^rBp#v#Rv#Vl#JNTbBf#j#P^?lA\\fCn#j#HfF|AjDfA\\Jd#NdAb#TH",
"wtsqHagqyBr#^VJTDJANG\\e#RSTS",
"qnsqHghqyBTHTBzAZbBZ|Bd#r#LnBb#PBJBpAVzAVJ#H#\\F^Hb#PZ\\R\\L^Px#VdDNzBBn#B\\B^Bb#\\~ETnDBl#TtENrARvABNn#bDTdAh#pBt#bDr#zCh#|Bz#dDjB`IdAvE`A|Dz#tDvCdMt#~Cn#hCXjA",
"yoqqHe_myBjh#j{BdIf]raAprAx#hAzh#lr#pAdAjNfLdOtJrGvEzBxA|#l#\\TTNzA`ArBtAbDtBfBjALHpAz#n#`#pAz#hAx#n#b#JHZXf#f#jAnA~BnChCvCbAhApAzAvA~AhApAlAvArAzA`AhApAxAv#|#b#f#lApAFF|#dA~#bA|#bAj#p#bDtDlAtArEnF|L`O~IvG~QlNbCjD~BlH|#|EN|#DfC#dBDpA?d##`AD|#Dl#Fr#Lz#Lr#Pr#Ld#Xp#Zp#T`#\\f#b#b#h#f#TJTLXLXHZFTDRDV#T#X?P#N?P?F?\\#jB?|##n##jA#x#?z##\\?X?^A\\Ed#E`#If#Kl#IhASvAWx#OVETERElAUzAYHC^IdBYnASjASbASbAQ^GTE^InAU~AY|#Qv#Od#Gr#Mv#Oz#Mz#QTGXE|AYv#On#Kv#ONCd#Ij#MNCb#Md#O`#Q\\Q\\O^WpAw#f#]f#Wf#[^WTMjAu#z#g#LIl#_#n#a#t#e#ZOh#_#d#Yb#WVIREVC`##^?h#Bn##|##hAB|##j##R?lA#fABV#P#RDRFZJPNPNXTX^PTt#fANRd#n#Xd#^n#Xj#Xl#Tp#Rl#Nj#Lp#Jt#Ht#Fv#Bv#D|##hBBnB#rB#jA#d##h#BZJn#Lf#L\\PZTVPRTJXJXFLBRAREVMRKRQb#k#l#u#n#}#l#s#TWNITKPAZCPBJBVNTRR\\Xl#Z~#V|#Hd#Ff#Bf##f#Aj#Ed#Kj#Or#Mj#Sv#Mb#GXI`#EXE`#AZA`#?N?P#VBRLv#Lb#Rb#NVPPXTVLb#Lr#Th#NZHZJVHPFf#Nj#Pj#Pt#TrA^vA`#tAb#bAZHBdDdA`Bf#fBf#jA\\|#Xp#PVHzAd#f#NbAZh#Pj#P~#XlA^`AVt#V|#Xb#NZF\\L\\J\\DV#Z?d#GZK`#Sf#Un#[TM|#a#p#Yh#Yp#[j#Yr#[d#Sd#Md#EVCf#BPBF?L#fAHx#Fr#Dj#BbBLb#Dv#FR#`#B`#Dl#Dd#Bj#D`#Bj#Db#B~#HhBLx#FN#d#D~#F`CPJ#nAJT?fAHb#FbBHfAJdAHR#VBB?z#Fn#Dt#Fn#Dj#DL#bAFd#B\\A^CP?HALCNAPE\\G^GHCv#O^G`#GZE`#C`#?^#ZB^FTDPDPFZJ`#Pd#T^PVN\\NPH`#Rb#LRF\\FVFVDB?V#JBxALxAJnAHfBNnAFr#FfAHhAHl#Bd#FRBF?D#xAVbBZpE`ArBd#B?nAT~AZ|Bh#pDt#dGpApDv#t#N|#RpB`#dGrAbIxAr#LhATfDl#b#LtBj#\\JRB|#Pj#L~AZvAVh#JhB^lAVbDr#TFrAZlBjBpBrBd#`#BDZZtCbDl#l#xA~AJJXXvA|AJJz#~#tAzA\\`#rAzAbAvAZVLJNL",
"slupHqjxxB\\Xj#^x#j#NHj#\\~A`AVPxBrADBfAt#nAx#dBdAp#d#pAx#dEnCLHLHTNZRRLXPXPfAp#b#Vj#\\|A`AZRj#^|#l#HDrAx#lAz#|#p#FB~#v#pA`AdAv#",
"wmspHw|vxBEDKPALCT?pAAbAFhBNZ",
"ymspH_rvxBd#B`BUdCa#n#[ZOHC",
"ubspHcuvxBDC?Ar#Yl#a#|A_BlC_Dl#k#bAiAd#c#`AcAp#s##Ab#]NILIVKf#Kj#AVCVAr#Id#Ez#SLGDCTORQJK#CZc#R_#b#sAT}#d#sBFWLk#NaAJg#",
"q{qpHe}wxBBMh#cF|#cIXuCv#yGPs#\\y#t#q#",
"mrqpHkayxBlCkAlAi#lAo#v#e#t#e#tC{#^InDu#fAW|#GP#r#BdBZxBn#`IfBlAb#fAv#",
"k~opHceyxBd#j#TTPt#FT",
"u{opHu`yxBoBTu#BuHl#o#BI#",
"klppHg~xxBMqFxAI"
)
)
How can i get a normal NSArray with 25 NSString object?

Answer 1

You're looking at the correct output from the polyline field in the JSON. The data is encoded with Google's polyline encoding, which is documented here
https://developers.google.com/maps/documentation/utilities/polylinealgorithm
There are a number of methods online for parsing said string in objective-c, such as this one.

Answer 2

Ok, i have found the solution parsing json with NSJSONSerialization:
NSDictionary *jsonArray = [NSJSONSerialization JSONObjectWithData:dataRequest options:NSJSONReadingMutableContainers error: nil];
NSArray * items = [jsonArray valueForKeyPath:#"routes.legs.steps.polyline.points"];
items = [items objectAtIndex:0];
items = [items objectAtIndex:0];
And in items array you will get string with encode direction