iOS开发：xmpp下的xml数据解析及修改上传

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一、利用xmpp里的扩展文件进行xml数据解析，xml数据解析的框架需要自己手动写出。

包含这个头文件NSXMLElement+XMPP.m。主要使用了这个文件中的如下方法：

- (NSXMLElement *)elementForName:(NSString *)name
{
	NSArray *elements = [self elementsForName:name];
	if ([elements count] > 0)
	{
		return [elements objectAtIndex:0];
	}
	else
	{
		// There is a bug in the NSXMLElement elementsForName: method.
		// Consider the following XML fragment:
		// 
		// <query xmlns="jabber:iq:private">
		//   <x xmlns="some:other:namespace"></x>
		// </query>
		// 
		// Calling [query elementsForName:@"x"] results in an empty array!
		// 
		// However, it will work properly if you use the following:
		// [query elementsForLocalName:@"x" URI:@"some:other:namespace"]
		// 
		// The trouble with this is that we may not always know the xmlns in advance,
		// so in this particular case there is no way to access the element without looping through the children.
		// 
		// This bug was submitted to apple on June 1st, 2007 and was classified as "serious".
		// 
		// --!!-- This bug does NOT exist in DDXML --!!--
		
		return nil;
	}
}

xml数据解析框架书写，针对不同的xml数据节点书写不同，可以抽出为一个通用性更广泛的方法。

- (NSArray *)emailAddresses {
    //获取Email节点
    NSXMLElement *emailEle = [self elementForName:@"EMAIL"];
    //获取Email的子节点
//    NSArray *children = [emailEle children];
//    WCLog(@"%@",children);
    NSXMLElement *useridEle = [emailEle elementForName:@"USERID"];
    //获取邮箱
    NSString *email = [useridEle stringValue];
    WCLog(@"%@",email);
    
#warning 只返加USERID的邮箱
    if (email.length > 0) {
        return @[email];
    }
    return nil;
}

//获取邮箱
    NSArray *emails = myvCard.emailAddresses;
    if (emails.count > 0) {
        self.emailLabel.text = emails[0];;
    }

二、利用xmpp里的扩展文件进行xml数据添加、删除、更改，xml数据添加的框架需要自己手动写出。

包含这个头文件NSXMLElement+XMPP.m。主要使用了这个文件中的如下方法对节点进行删除：

/**
 * This method removes the first child element for the given name.
 * If no child elements exist for the given name, this method does nothing.
**/
- (void)removeElementForName:(NSString *)name
{
    NSXMLElement *element = [self elementForName:name];

    if(element)
    {
        [self removeChildAtIndex:[[self children] indexOfObject:element]];
    }
}

包含这个头文件DDXMLNode.m。主要使用了这个文件中的如下方法设置新的节点：

+ (id)elementWithName:(NSString *)name stringValue:(NSString *)string
{
	return [[DDXMLElement alloc] initWithName:name stringValue:string];
}

- (void)setEmailAddresses:(NSArray *)emails {

    //邮箱数组只能有一个邮箱
    
    NSAssert(emails.count == 1,@"邮箱数组只能有一个邮箱");
    /*
     * 
     <EMAIL>
     <HOME />
     <INTERNET />
     <PREF />
     <USERID>lisi@itcast.cn</USERID>
     </EMAIL>
     */
    
    //获取Email节点
    NSXMLElement *emailEle = [self elementForName:@"EMAIL"];
    
//    //获取Email下的USERID的子节点
//    NSXMLElement *useridEle = [emailEle elementForName:@"USERID"];
//    //更新USERID的内容
    
    //删除USERID节点
    [emailEle removeElementForName:@"USERID"];
    
    //添加回节点
    NSXMLElement *useridEle = [NSXMLElement elementWithName:@"USERID" stringValue:emails[0]];
    
    //把USERID添加到email节点下
    [emailEle addChild:useridEle];
    

}

//解析邮箱
    //myVCard.mailer = self.emailLabel.text;
    if (self.emailLabel.text.length > 0) {
        // 只保存一个邮箱
        myVCard.emailAddresses = @[self.emailLabel.text];
    }

iOS开发：xmpp下的xml数据解析及修改上传

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原文地址：http://blog.csdn.net/gongwutianya/article/details/51336012