Question

hello this is my xml in one string…

<?xml version="1.0" encoding="utf-8"?>

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<soap:Body><CelsiusToFahrenheitResponse 

xmlns="http://tempuri.org/"><CelsiusToFahrenheitResult>73.4</CelsiusToFahrenheitResult>

</CelsiusToFahrenheitResponse></soap:Body></soap:Envelope>

i want 73.4 from this <CelsiusToFahrenheitResult>73.4</CelsiusToFahrenheitResult> …is ther any quickest method using string functions for doing this? …don’t want to traverse whole xml!

Answer 1

The most simple solution without using an xml-parser would be to use NSRegularExpression. Something like this:

NSString *pattern = @"<CelsiusToFahrenheitResult>(.*)</CelsiusToFahrenheitResult>";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern
                                                                       options:NSRegularExpressionCaseInsensitive
                                                                         error:nil];
__block NSString *fahrenheitString = nil;
[regex enumerateMatchesInString:yourString options:0 range:NSMakeRange(0, [yourString length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){
    if (0 < [match numberOfRanges]) {
        NSRange range = [match rangeAtIndex:1];
        fahrenheitString = [yourString substringWithRange:range];
    }    
}];