如何将trim个字符从一个位置iOS移到另一个位置（Objective C）？

Question

我的问题是，我想 trim 从我的字符串中删除一些字符。我的字符串包含 xml。所以我需要 trim 个字符从 xml 开始标签到它的结束标签。我该怎么做？

例如：我的字符串包含以下 xml 代码。

<CategoriesResponse xmlns="https://abc.defg.com/hijk">
    <MainCategories>
        <CatID xsi:type="xsd:int">178</CatID>
        <CatID xsi:type="xsd:int">150</CatID>
        <CatID xsi:type="xsd:int">77</CatID>
        <CatID xsi:type="xsd:int">33</CatID>
        <CatID xsi:type="xsd:int">179</CatID>
    </MainCategories>
<SubCategories>
    //some needed elements should not be trimmed.
</SubCategories>

我需要 trim 从开始标签 <MainCategories> 到结束标签 </MainCategories>。怎么做？？所以在这里我的起始字符将是 <MainCategories 并且结束字符将是 /MainCategories>

Answer 1

试试这个

NSString *str = @"<CategoriesResponse xmlns=\"https://abc.defg.com/hijk\"><MainCategories><CatID xsi:type=\"xsd:int\">178</CatID><CatID xsi:type=\"xsd:int\">150</CatID><CatID xsi:type=\"xsd:int\">77</CatID><CatID xsi:type=\"xsd:int\">33</CatID><CatID xsi:type=\"xsd:int\">179</CatID></MainCategories><SubCategories></SubCategories>";


NSRange startRange = [str rangeOfString:@"<MainCategories>"];
NSRange endRange = [str rangeOfString:@"</MainCategories>"];
NSString *replacedString = [str stringByReplacingCharactersInRange:NSMakeRange(startRange.location, (endRange.location+endRange.length)-startRange.location) withString:@""];
NSLog(@"%@",replacedString);

希望对您有所帮助。

Answer 2

试试下面的代码：

NSString *strXml=@"<CategoriesResponse xmlns=\"https://abc.defg.com/hijk\"><MainCategories><CatID xsi:type=\"xsd:int\">178</CatID><CatID xsi:type=\"xsd:int\">150</CatID><CatID xsi:type=\"xsd:int\">77</CatID><CatID xsi:type=\"xsd:int\">33</CatID><CatID xsi:type=\"xsd:int\">179</CatID></MainCategories><SubCategories></SubCategories>";

                       strXml=[strXml stringByReplacingOccurrencesOfString:@"<MainCategories>" withString:@"<MainCategories"];

                       strXml=[strXml stringByReplacingOccurrencesOfString:@"</MainCategories>" withString:@"/MainCategories>"];

                       NSLog(@"%@",strXml);

希望对您有所帮助:)

如何将trim个字符从一个位置iOS移到另一个位置（Objective C）？

How to trim characters from a position to another position in iOS (Objective C)?

xml

objective-c

nsstring

ios