HarmonyOS 监听折叠状态回调里获取屏幕宽度存在问题

onFoldDisplayMode() {
let callback: Callback<display.FoldDisplayMode> = (data: display.FoldDisplayMode) => {
if (data === display.FoldDisplayMode.FOLD_DISPLAY_MODE_FULL) {
console.log (`FOLD_DISPLAY_MODE_FULL width is ${display.getDefaultDisplaySync ().width}`)
}
else if (data === display.FoldDisplayMode.FOLD_DISPLAY_MODE_MAIN) {
console.log (`FOLD_DISPLAY_MODE_MAIN width is ${display.getDefaultDisplaySync ().width}`)
}
else if (data === display.FoldDisplayMode.FOLD_DISPLAY_MODE_SUB) {
console.log (`FOLD_DISPLAY_MODE_SUB width is ${display.getDefaultDisplaySync ().width}`)
}
else {
console.log (`FOLD_STATUS_UNKNOWN width is ${display.getDefaultDisplaySync ().width}`)

}
console.info ('Listening enabled. Data: ' + JSON.stringify (data));
};
try {
display.on ('foldDisplayModeChange', callback);
} catch (exception) {
console.error ('Failed to register callback. Code: ' + JSON.stringify (exception));
}
}