#鸿蒙通关秘籍# 如何在HarmonyOS NEXT中使用本地存储？

// SetFontSizePage.ets
build() {
    Row() {
        Slider({
            // ...
        }).onChange(async (value: number) => {
            // 保存当前进度值
            if (this.changeFontSize === 0) {
                this.fontSizeText = `SetViewModel.getTextByFontSize(value)`;
                return;
            }
            this.changeFontSize = (value === `CommonConstants.SET_SLIDER_MAX` ? `CommonConstants.SET_SIZE_HUGE` : value);
            this.fontSizeText = `SetViewModel.getTextByFontSize(this.changeFontSize)`;
            let myPreferences: preferences.Preferences | null = null;
            preferences.getPreferences(getContext(this), 'myStore').then((object: preferences.Preferences) => {
                myPreferences = object;
                myPreferences.put(`KEY_APP_FONT_SIZE`, this.changeFontSize).then(() => {
                    myPreferences?.flush();
                });
            })
        })
    }
}
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