uni-app 屏幕旋转

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输入参数
portrait-primary:竖屏主方向
portrait-secondary: 竖屏次方向
landscape-primary:横屏主方向
landscape-secondary:横屏次方向
portrait:竖屏方向(primary + secondary)
landscape:横屏方向(primary + secondary)
natural:设备的自然方向
any: 锁定四个方向，即锁定当前屏幕方向
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plus.screen.lockOrientation('landscape-primary');