文件的写入：

直接通过FileUtils来保存键值对，示例如下：

Value a=Value(10);

Value b=Value("Hello");

ValueMap valueMap;

valueMap.insert(std::make_pair("number",a));

valueMap.insert(std::make_pair("name",b));

std::string filepath=FileUtils::getInstance()->getWritablePath();//获取可写路径，只能在可写路径下进行文件的写入

log("path is %s",filepath.c_str());//打印可写路径

FileUtils::getInstance()->writeToFile(valueMap,filepath+"/hh.plist");

//用模拟器console下查看产生的hh.plist文件的路径和文件内容如下：

localhost:Documents wangwei$ pwd

/Users/wangwei/Library/Developer/CoreSimulator/Devices/84781560-37A5-4F81-B2E6-39DD8C8757B6/data/Containers/Data/Application/4EB4CD53-4574-4ED6-A82F-FBA88C920ABF/Documents

localhost:Documents wangwei$ ls

hh.plist

localhost:Documents wangwei$ more hh.plist

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>name</key>

<string>Hello</string>

<key>number</key>

<integer>10</integer>

</dict>

</plist>

用真机调试的文件路径如下：

path is /var/mobile/Containers/Data/Application/2F159D86-297F-4ECA-A8A0-CD35287078AF/Documents/

文件的读取：

ValueMap read_valueMap;

read_valueMap=FileUtils::getInstance()->getValueMapFromFile(filepath+"/hh.plist");

std::string name=valueMap.at("name").asString();

log("read name is %s",name.c_str());