更新ios系统的方法如下：
方法一
1.我们可以通过itunes更新，首先下载安装itunes。
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2.将ipad连接上电脑，然后我们选择界面上的更新即可。
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方法二
1.直接通过wifi在ipad上更新，首先我们打开打开设置，打开wifi，选择通用，点击里面的软件更新。
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2.如果有更新的话，我们就可以看到更新的内容，我们点击下载安装更新即可。
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