我正在使用raptureXML从XML <forecast .../>
标记提取数据。
这是XML
<?xml version="1.0" ?>
<weatherdata>
<weather weatherlocationname="Chicago, IL">
<forecast low="67" high="86" skycodeday="34" skytextday="Mostly Sunny" date="2012-08-27" day="Monday" shortday="Mon" precip="0" />
<forecast low="66" high="82" skycodeday="34" skytextday="Mostly Sunny" date="2012-08-28" day="Tuesday" shortday="Tue" precip="0" />
<forecast low="66" high="82" skycodeday="34" skytextday="Mostly Sunny" date="2012-08-29" day="Wednesday" shortday="Wed" precip="0" />
<forecast low="68" high="88" skycodeday="32" skytextday="Sunny (Clear)" date="2012-08-30" day="Thursday" shortday="Thu" precip="0" />
<forecast low="70" high="90" skycodeday="34" skytextday="Mostly Sunny" date="2012-08-31" day="Friday" shortday="Fri" precip="0" />
<toolbar timewindow="60" minversion="1.0.1965.0" />
</weather>
</weatherdata>
我将此代码用于raptureXML
RXMLElement *rootXML = [RXMLElement elementFromXMLString:XML encoding:NSUTF8StringEncoding];
[rootXML iterate:@"forecast" usingBlock:^(RXMLElement *element)
{
NSString *high = [element attribute:@"low"];
NSLog(@"high: %@", high);
}];
NSArray *forecast = [rootXML children:@"forecast"];
NSLog(@"[forecast count]: %d", [forecast count]);
很简单吧?但问题是它找不到任何预测标签,即
NSLog(@"high: %@", high);
和[forecast count]
为零时我什么也没得到。我错过了什么?
最佳答案
我没有使用过RaptureXML,但好像您错过了一层。 rootXML
可能是weatherdata
,因此它没有forecast
子级,因为它的唯一子级是weather
,它确实具有forecast
子级。尝试添加:
RXMLElement *weather = [rootXML child:@"weather"];
然后在其余的代码中使用
weather
代替rootXML
。像这样:
RXMLElement *rootXML = [RXMLElement elementFromXMLString:XML encoding:NSUTF8StringEncoding];
RXMLElement *weather = [rootXML child:@"weather"];
[weather iterate:@"forecast" usingBlock:^(RXMLElement *element)
{
NSString *high = [element attribute:@"low"];
NSLog(@"high: %@", high);
}];
NSArray *forecast = [weather children:@"forecast"];
NSLog(@"[forecast count]: %d", [forecast count]);