在 xpath 查询中使用变量..可能吗？
有人可以告诉我如何在 iPhone 的 c-objective 中的 XPath 查询中使用带有变量的文本函数吗？ 中存在的工程库信息
我需要 xml http://www.sis 。 pitt.edu/~arazeez/Librarydata.xml
NSString *libName = @"Engineering Library";
NSMutableString *xpathquery = [[NSMutableString alloc] init];
[xpathquery appendString:@"//Library[LibraryName/text() = '"];
[xpathquery appendString:libName];
[xpathquery appendString:@"']/../Hours/TermOrHolidays"];
resultNodes = [rssParser nodesForXPath:xpathquery error:nil];
或其他变体
NSString *string1 = @"//LibraryName[text() = '";
NSString *string2 = @"']/../Hours/TermOrHolidays";
NSString *newString; NSString *newString1;
newString = [string1 stringByAppendingString:libName];
newString1 = [newString stringByAppendingString:string2];
NSLog(newString1);
//correct one below //resultNodes = [rssParser nodesForXPath:@"//LibraryName[text()= 'Engineering Library']/../Hours/TermOrHolidays" error:nil];
resultNodes = [rssParser nodeForXPath:newString1 error:nil];
如果此方法不正确，请有人告诉我如何获取工程图书馆的数据。我不想直接使用这个词，而是想通过变量使用它。
谢谢
Could some one please tell me how do we use the text function with variable in the XPath query in c-objective for iphone. I needed the information for Engineering Library present in the xml
http://www.sis.pitt.edu/~arazeez/Librarydata.xml
NSString *libName = @"Engineering Library";
NSMutableString *xpathquery = [[NSMutableString alloc] init];
[xpathquery appendString:@"//Library[LibraryName/text() = '"];
[xpathquery appendString:libName];
[xpathquery appendString:@"']/../Hours/TermOrHolidays"];
resultNodes = [rssParser nodesForXPath:xpathquery error:nil];
or another variant
NSString *string1 = @"//LibraryName[text() = '";
NSString *string2 = @"']/../Hours/TermOrHolidays";
NSString *newString; NSString *newString1;
newString = [string1 stringByAppendingString:libName];
newString1 = [newString stringByAppendingString:string2];
NSLog(newString1);
//correct one below //resultNodes = [rssParser nodesForXPath:@"//LibraryName[text()= 'Engineering Library']/../Hours/TermOrHolidays" error:nil];
resultNodes = [rssParser nodeForXPath:newString1 error:nil];
If this method is not right, could some one please tell me how to fetch the data for Engineering Library. I dont want to use the word directly but want to use it through a variable.
Thanks
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使用 [NSString stringWithFormat:@"//LibraryName[text() = '%@']/../Hours/TermOrHolidays", someVariable] 构造字符串可能会更容易
然后只要 xpath 查询没问题就可以工作。
It might be easier to construct the string using [NSString stringWithFormat:@"//LibraryName[text() = '%@']/../Hours/TermOrHolidays", someVariable]
Then as long as the xpath query is okay it will work.
使用这个 xpath:
或这个:怎么样？
how about using this xpath:
or this one: