本文开启ios原生虚拟内存教程只适合于 iOS 5.1.1~6.1.2系统，iOS 6.1.2 对iPhone4的内存要求太高了，打开没几个软件就出现很多LowMemory的错误报告log，成功开启虚拟内存即可解决问题(就像Win PC用硬盘空间弥补内存空间不足的情况)。

　　我按照内存使用率，从高到低，将部分显出出来，给懂的人看，有图有真相!

　　一共运行88个程序，包括真实赛车3，英雄战歌等多款大作，自带的512M内存，只剩下8824K自由空间，而此时虚拟内存调用320MB磁盘空间，完全感觉不到丝毫卡~

　　以下是相关文件说明，如果觉得不好，把com.apple.virtualMemory.plist和 com.apple.dynamic_pager.plist删除，把com.apple.SpringBoard.plist 还原，然后在命令控制台中输入reboot就可以恢复到之前的时候，不用从刷手机的：

　　com.apple.virtualMemory.plist 放在 /private/var/preferences

　　com.apple.dynamic_pager.plist 放在 /System/Library/LaunchDaemons

　　在 /System/Library/LaunchDaemons/com.apple.SpringBoard.plist 必须进行手动的修改，修改内容往下看。(记得备份)

　　在 /private/var 里新建VM的文件夹，权限设置如图：

　　全部完成后，重启手机，/private/var/VM 出现swapfile0就说明成功。

　　软件名称： iFiles(苹果资源管理器)1.9.3

　　com.apple.SpringBoard.plist 按照规则添加红色部分，建议使用iFile进行修改：

<?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>EmbeddedHomeScreen</key>
    <true/>
    <key>HighPriorityIO</key>
    <true/>
    <key>Label</key>
    <string>com.apple.SpringBoard</string>
    <key>MachServices</key>
    <dict>
        <key>PurpleSystemAppPort</key>
        <dict>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.SBUserNotification</key>
        <true/>
        <key>com.apple.UIKit.statusbarserver</key>
        <true/>
        <key>com.apple.aps.alertprovider.xpc</key>
        <true/>
        <key>com.apple.bulletinboard.observerconnection</key>
        <true/>
        <key>com.apple.bulletinboard.publisherconnection</key>
        <true/>
        <key>com.apple.bulletinboard.settingsconnection</key>
        <true/>
        <key>com.apple.bulletinboard.systemstateconnection</key>
        <true/>
        <key>com.apple.bulletinboard.utilitiesconnection</key>
        <true/>
        <key>com.apple.chatkit.clientcomposeserver.xpc</key>
        <true/>
<key>com.apple.dynamic_pager</key> <dict> <key>ResetAtClose</key> <true/> </dict>         <key>com.apple.icfcallserver</key>
        <true/>
        <key>com.apple.springboard</key>
        <dict>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.springboard.UIKit.migserver</key>
        <dict>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.springboard.alerts</key>
        <dict>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.springboard.backgroundappservices</key>
        <dict>
            <key>HideUntilCheckIn</key>
            <true/>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.springboard.blockableservices</key>
        <dict>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.springboard.carditemscontroller</key>
        <true/>
        <key>com.apple.springboard.icongeneration</key>
        <true/>
        <key>com.apple.springboard.processinvalidation</key>
        <dict>
            <key>HideUntilCheckIn</key>
            <true/>
        </dict>
        <key>com.apple.springboard.remotenotifications</key>
        <dict>
            <key>ResetAtClose</key>
            <true/>
        </dict>
        <key>com.apple.springboard.services</key>
        <dict>
            <key>HideUntilCheckIn</key>