如何在iOS Safari中获取当前屏幕方向？

// 检测屏幕方向变化的事件
window.addEventListener("orientationchange", function() {
  var orientation = window.orientation;
  var screenOrientation;

  // 根据屏幕方向的角度值来判断方向
  switch (orientation) {
    case 0:
      screenOrientation = "竖直方向，Home键在下方";
      break;
    case 90:
      screenOrientation = "横向，Home键在左侧";
      break;
    case -90:
      screenOrientation = "横向，Home键在右侧";
      break;
    case 180:
      screenOrientation = "竖直方向，Home键在上方";
      break;
    default:
      screenOrientation = "未知方向";
      break;
  }

  // 输出当前屏幕方向
  console.log("当前屏幕方向：" + screenOrientation);
});