大纲：

kissxml大纲.png

集成KissXML

使用Cocoapods集成

KissXML GitHub 路径 https://github.com/robbiehanson/KissXML

cd 你的项目路径
pod init
在项目中打开 Podfile 文件添加 pod 'KissXML'
pod install

KissXML基本了解

DDXMLDocument

DDXMLDocument 是文档

DDXMLElement

DDXMLElement 是元素节点

DDXMLNode

DDXMLNode 是子节点

XML文件的解析

解析XML文件的某个子节点

在项目中引入头文件

'#import <KissXML.h>

    ///获取文件路径
    NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"xml"];
    ///把文件转化成string
    NSString *xmlStr = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    ///使用kissXML解析
    DDXMLDocument *xmlDocument = [[DDXMLDocument alloc] initWithXMLString:xmlStr options:0 error:nil];
    ///找到xmlDocument下面所有的book元素
    NSArray *arr = [xmlDocument nodesForXPath:@"//book" error:nil];
     for (int i = 0; i < arr.count; i ++) {
        DDXMLElement *element = arr[i];
        //分别为当前接点的名字、上一个接点（平级）、下一个接点（平级）、上一个接点、第一个子节点
        NSLog(@" 打印信息:%@--%@--%@--%@--%@--%@",element.name,element.previousSibling.name,element.nextSibling.name,element.previousNode.name,element.nextNode.name,element.parent.name);
    }

获取XML文件子节点数组

  ///获取文件路径
    NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"xml"];
    ///把文件转化成string
    NSString *xmlStr = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    ///使用kissXML解析
    DDXMLDocument *xmlDocument = [[DDXMLDocument alloc] initWithXMLString:xmlStr options:0 error:nil];
    ///找到xmlDocument下面所有的book元素
    NSArray *arr = [xmlDocument nodesForXPath:@"//book" error:nil];

修改拼接XML文件

修改XML文件的属性

    ///获取文件路径
    NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"xml"];
    ///把文件转化成string
    NSString *xmlStr = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    ///使用kissXML解析
    DDXMLDocument *xmlDocument = [[DDXMLDocument alloc] initWithXMLString:xmlStr options:0 error:nil];
    
    
    NSLog(@"XML元素的数量%ld",xmlDocument.childCount);
    NSLog(@"XML元素的数组%@",xmlDocument.children);
    
    ///找到要修改的元素 修改内容
    for (DDXMLElement *element in xmlDocument.children) {
        ///找到shop元素
        if ([element.name isEqualToString:@"shop"]) {
            DDXMLElement *shopElement = element;
            ///shop标签下的所有元素数组
            NSArray *penChildren = shopElement.children;
            for (DDXMLElement *childelement in penChildren) {
                ///找到pen元素
                if ([childelement.name isEqualToString:@"pen"]) {
                    
                    for (DDXMLNode *childnode in childelement.children) {
                        if ([childnode.name isEqualToString:@"type"]) {
                            [childnode setStringValue:@"---000---"];
                        }
                        if ([childnode.name isEqualToString:@"manufacturers"]) {
                            [childnode setStringValue:@"---xxxxx---"];
                        }
                    }
                }
            }
        }
    }
    
    ///修改完成之后需要把XML文件重新保存到新的地址 原文件修改的值不变
    NSString *newPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject stringByAppendingPathComponent:@"newXML.xml"];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    ///查看路径是否存在
    BOOL isFile = [fileManager fileExistsAtPath:newPath];
    if (isFile) {
        [fileManager removeItemAtPath:newPath error:nil];
    }
    NSMutableData *mutableData = [NSMutableData data];
    NSData *data = [xmlDocument XMLData];
    [mutableData appendData:data];
    
    [mutableData writeToFile:newPath atomically:YES];

拼接XML文件

///获取文件路径
NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"xml"];
///把文件转化成string
NSString *xmlStr = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
///使用kissXML解析
DDXMLDocument *xmlDocument = [[DDXMLDocument alloc] initWithXMLString:xmlStr options:0 error:nil];

for (DDXMLElement *ele in xmlDocument.children) {
    if ([ele.name isEqualToString:@"shop"]) {
        DDXMLElement *elementOne = [DDXMLElement elementWithName:@"one" stringValue:@"one"];
        DDXMLElement *elementTwo = [DDXMLElement elementWithName:@"two" stringValue:@"two"];
        [ele addChild:elementOne];
        [ele addChild:elementTwo];
    }
}

///修改完成之后需要把XML文件重新保存到新的地址 原文件修改的值不变
NSString *newPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject stringByAppendingPathComponent:@"newXML.xml"];
NSFileManager *fileManager = [NSFileManager defaultManager];
///查看路径是否存在
BOOL isFile = [fileManager fileExistsAtPath:newPath];
if (isFile) {
    [fileManager removeItemAtPath:newPath error:nil];
}
NSMutableData *mutableData = [NSMutableData data];
NSData *data = [xmlDocument XMLData];
[mutableData appendData:data];

[mutableData writeToFile:newPath atomically:YES];