使用 Objective-C 进行 TBXML 解析

Question

我正在尝试使用 TBXML 解析以下 xml。我想创建一个包含所有项目标签值的数组。如何遍历“item”标签？

<root>
<item>
<northeast_area>
<item>
<new_england_north xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:string[8]">
    <item xsi:type="xsd:string">boston s, ma</item>
    <item xsi:type="xsd:string">providence, ri</item>
    <item xsi:type="xsd:string">boston, ma </item>
    <item xsi:type="xsd:string">portland, me</item>
    <item xsi:type="xsd:string">boston, ma </item>
    <item xsi:type="xsd:string">boston central</item>
    <item xsi:type="xsd:string">boston north, ma</item>
    <item xsi:type="xsd:string">boston south, ma</item>
</new_england_north>
</item>

<item>
<upstate_new_york xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:string[6]">
    <item xsi:type="xsd:string">binghampton, ny</item>
    <item xsi:type="xsd:string">rochester, ny</item>
    <item xsi:type="xsd:string">albany s, ny</item>
    <item xsi:type="xsd:string">syracuse, ny</item>
    <item xsi:type="xsd:string">albany, ny</item>
    <item xsi:type="xsd:string">buffalo, ny</item>
</upstate_new_york>
</item>
</northeast_area>
</item>

Answer 1

下面是一段从文件读取 XML 的示例代码。您可以调整它以使用可用的 NSString/NSData 对象。 请注意，由于我们不知道您的 SOAP 调用可以返回的确切潜在格式，因此这不是很可靠，它只是一个适用于您提供的数据的解决方案。

int main (int argc, const char * argv[])
{

    @autoreleasepool {
        NSString* path = @"/Path/To/Your/File";
        NSData *contents = [[NSFileManager defaultManager] contentsAtPath:path];
        TBXML *xml = [TBXML tbxmlWithXMLData:contents];

        TBXMLElement *rootElement = [xml rootXMLElement];

        TBXMLElement *rootItemElem = [TBXML childElementNamed:@"item" parentElement:rootElement];

        while (rootItemElem != nil) {
            TBXMLElement *areaElement = rootItemElem->firstChild;

            while (areaElement != nil) {
                TBXMLElement *areaItemElement = [TBXML childElementNamed:@"item" parentElement:areaElement];
                while (areaItemElement != nil) {
                    TBXMLElement *localeItem = areaItemElement->firstChild;
                    NSLog(@"Checking locale %s", localeItem->name);
                    TBXMLElement *specificItem = [TBXML childElementNamed:@"item" parentElement:localeItem];
                    while (specificItem != nil) {
                        NSLog(@"Item with value: %@", [TBXML textForElement:specificItem]);
                        specificItem = [TBXML nextSiblingNamed:@"item" searchFromElement:specificItem];
                    }

                    areaItemElement = [TBXML nextSiblingNamed:@"item" searchFromElement:areaItemElement];
                }

                areaElement = areaElement->nextSibling;
            }

            rootItemElem = [TBXML nextSiblingNamed:@"item" searchFromElement:rootItemElem];
        }

    }
    return 0;
}

输出：

2011-10-19 08:20:40.321 Testing[14768:707] Checking locale new_england_north
2011-10-19 08:20:40.323 Testing[14768:707] Item with value: boston s, ma
2011-10-19 08:20:40.323 Testing[14768:707] Item with value: providence, ri
2011-10-19 08:20:40.324 Testing[14768:707] Item with value: boston, ma
2011-10-19 08:20:40.324 Testing[14768:707] Item with value: portland, me
2011-10-19 08:20:40.325 Testing[14768:707] Item with value: boston, ma
2011-10-19 08:20:40.326 Testing[14768:707] Item with value: boston central
2011-10-19 08:20:40.326 Testing[14768:707] Item with value: boston north, ma
2011-10-19 08:20:40.327 Testing[14768:707] Item with value: boston south, ma
2011-10-19 08:20:40.327 Testing[14768:707] Checking locale upstate_new_york
2011-10-19 08:20:40.328 Testing[14768:707] Item with value: binghampton, ny
2011-10-19 08:20:40.328 Testing[14768:707] Item with value: rochester, ny
2011-10-19 08:20:40.329 Testing[14768:707] Item with value: albany s, ny
2011-10-19 08:20:40.329 Testing[14768:707] Item with value: syracuse, ny
2011-10-19 08:20:40.330 Testing[14768:707] Item with value: albany, ny
2011-10-19 08:20:40.330 Testing[14768:707] Item with value: buffalo, ny

使用它，创建一个 NSArray 并存储项目，或者创建一个 NSArray 应该相当简单对于每个区域设置并以这种方式分隔项目。 （将它们存储在由区域设置键入的 NSDictionary 中。）