ios - Use TBXML to grab an unknown number of elements -

my question is: how extract unknown number of xml elements predictable element name , grab attribute values?

i'm using tbxml (love far) parse weather observation data national weather service.

here example of xml (the <metar> element pertinent part)

<metar>     <raw_text>         kden 181953z 01006kt 10sm few080 sct110 sct150 31/06 a3007 rmk ao2 slp093 ocnl ltgcg dsnt sw virga s-sw cb dsnt sw mov e t03110061     </raw_text>     <station_id>kden</station_id>     <observation_time>2014-08-18t19:53:00z</observation_time>     <latitude>39.85</latitude>     <longitude>-104.65</longitude>     <temp_c>31.1</temp_c>     <dewpoint_c>6.1</dewpoint_c>     <wind_dir_degrees>10</wind_dir_degrees>     <wind_speed_kt>6</wind_speed_kt>     <visibility_statute_mi>10.0</visibility_statute_mi>     <altim_in_hg>30.070866</altim_in_hg>     <sea_level_pressure_mb>1009.3</sea_level_pressure_mb>     <quality_control_flags>         <auto_station>true</auto_station>     </quality_control_flags>     <sky_condition sky_cover="few" cloud_base_ft_agl="8000"/>     <sky_condition sky_cover="sct" cloud_base_ft_agl="11000"/>     <sky_condition sky_cover="sct" cloud_base_ft_agl="15000"/>     <flight_category>vfr</flight_category>     <metar_type>metar</metar_type>     <elevation_m>1640.0</elevation_m> </metar> 

the important part <sky_condition> elements , attributes.

as weather changes number of <sky_condition> elements change. there may few one, , many lots.

i display them in order of iteration; first <sky_condition> element the important, followed next, ect.

i'm using traverseelement method iterate on xml. need grab attributes of many <sky_condition> elements there , store them display.

here traverseelement method implementation. passing argument metarelement represents xml pasted above.

- (void) traverseelement:(tbxmlelement *)element {      {         // display name of element         nslog(@"%@",[tbxml elementname:element]);          // obtain first attribute element         tbxmlattribute * attribute = element->firstattribute;          while (attribute) {             // display name , value of attribute log window             nslog(@"%@->%@ = %@",  [tbxml elementname:element],                   [tbxml attributename:attribute],                   [tbxml attributevalue:attribute]);              // obtain next attribute             attribute = attribute->next;         }          // if element has child elements, process them         if (element->firstchild)             [self traverseelement:element->firstchild];          // obtain next sibling element     } while ((element = element->nextsibling)); } 

i know need extract attribute values <sky_condition> elements , store them in array (arrays?), can't head around conditionals need write accomplish this.

any or hints appreciated.

i accomplished creating nsmutablearrays store attributes need. in @interface:

@property (nonatomic) bool isskyclear; @property (strong, nonatomic) nsmutablearray *fewarray; @property (strong, nonatomic) nsmutablearray *sctarray; @property (strong, nonatomic) nsmutablearray *bknarray; @property (strong, nonatomic) nsmutablearray *ovcarray;  

and method implementation - (void) traverseelement:(tbxmlelement *)element {:

 {         // display name of element         nslog(@"%@",[tbxml elementname:element]);          // obtain first attribute element         tbxmlattribute * attribute = element->firstattribute;          while (attribute) {             // display name , value of attribute log window              nslog(@"%@->%@ = %@",  [tbxml elementname:element],                 [tbxml attributename:attribute],                 [tbxml attributevalue:attribute]);              if ([[tbxml attributevalue:attribute] isequaltostring:@"clr"]) {                 self.isskyclear = yes;              } else if ([[tbxml attributevalue:attribute] isequaltostring:@"few"]) {                 attribute = attribute->next;                 nsstring *cloudbase = [tbxml attributevalue:attribute];                 [self.fewarray addobject:cloudbase];                 break;              } else if ([[tbxml attributevalue:attribute] isequaltostring:@"sct"]) {                 attribute = attribute->next;                 nsstring *cloudbase = [tbxml attributevalue:attribute];                 [self.sctarray addobject:cloudbase];                 break;              } else if ([[tbxml attributevalue:attribute] isequaltostring:@"bkn"]) {                 attribute = attribute->next;                 nsstring *cloudbase = [tbxml attributevalue:attribute];                 [self.bknarray addobject:cloudbase];                 break;              } else if ([[tbxml attributevalue:attribute] isequaltostring:@"ovc"]) {                 attribute = attribute->next;                 nsstring *cloudbase = [tbxml attributevalue:attribute];                 [self.ovcarray addobject:cloudbase];                 break;                                 }               attribute = attribute->next;            }          // obtain next sibling element     } while ((element = element->nextsibling)); }