iplay20怎么隐藏dock栏

iplay20怎么隐藏dock栏 就是图标和虚拟按键中间那一块
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用全面屏手势哇

<span style="color: #ff0000;">打开</span>

<span style="color: #ff0000;">设置-系统-导航栏-导航栏可隐藏开启<span style="color: #000000;">即可</span></span>