uniapp は画面が水平か垂直かを決定します

// 获取系统信息
const systemInfo = uni.getSystemInfoSync();
// 设备屏幕宽度
const screenWidth = systemInfo.screenWidth;
// 设备屏幕高度
const screenHeight = systemInfo.screenHeight;
// 设备屏幕方向
const orientation = screenWidth > screenHeight ? 'landscape' : 'portrait';

if (orientation === 'landscape') {
  // 禁用竖屏滚动
  document.body.style.overflow = 'hidden';
  // 页面横向排列
  document.body.style.flexDirection = 'row';
}

if (orientation === 'portrait') {
  // 恢复竖屏滚动
  document.body.style.overflow = '';
  // 页面竖向排列
  document.body.style.flexDirection = 'column';
}

export default {
  data() {
    return {
      screenWidth: '',
      screenHeight: '',
    }
  },
  computed: {
    isLandscape() {
      return this.screenWidth > this.screenHeight;
    },
    containerStyle() {
      return {
        flexDirection: this.isLandscape ? 'row' : 'column',
        // 其他布局样式
      }
    }
  },
  methods: {
    handleResize() {
      const systemInfo = uni.getSystemInfoSync();
      this.screenWidth = systemInfo.screenWidth;
      this.screenHeight = systemInfo.screenHeight;
    },
  },
  mounted() {
    // 监听窗口改变
    window.addEventListener('resize', this.handleResize, false);
    this.handleResize();
  },
  unmounted() {
    window.removeEventListener('resize', this.handleResize, false);
  }
}