<script>
  import { calcNavBarInfo } from './utils/nav_bar_data'
	export default {
    globalData: { cartId: Number, isLogin: false },
		onLaunch: function() {
			console.warn('当前组件仅支持 uni_modules 目录结构 ，请升级 HBuilderX 到 3.1.0 版本以上！')
			console.log('App Launch')
      calcNavBarInfo()
		},
		onShow: function() {
			console.log('App Show')
		},
		onHide: function() {
			console.log('App Hide')
		},
    methods: {
      watch(propertyName, callback, isLoad) {
        if(isLoad === false) return
        const obj = this.globalData
        let value = obj[propertyName]
      
        Object.defineProperty(obj, propertyName, {
          enumerable: true,
          configurable: true,
          get: function() {
            return value
          },
          set: function(newValue) {
            if (newValue !== value) {
              value = newValue
              callback(newValue) // 当属性值变化时调用回调函数
            }
          }
        })
      }
    },
	}
</script>

<style lang="scss">
	/*每个页面公共css */
	@import '@/uni_modules/uni-scss/index.scss';
  @import "@/uni_modules/uview-ui/index.scss";
	/* #ifndef APP-NVUE */
	@import '@/static/customicons.css';
	// 设置整个项目的背景色
	page {
		background-color: #f5f5f5;
	}

	/* #endif */
	.example-info {
		font-size: 14px;
		color: #333;
		padding: 10px;
	}
</style>