wxappb2b/GuangZuan/miniprogram/components/button-back/index.ts

import { getStatusBarHeight } from '../../stores/index'

Component({
    externalClasses: ['custom-class'],
    properties: {
        // 返回的页数
        go: {
            type: Number,
            value: 1,
        },
        // 是否固定位置
        fixed: {
            type: Boolean,
            value: false,
        },
        dark: {
            type: Boolean,
            value: false,
        },
    },
    data: {
        styles: '',
    },
    methods: {
        // 关闭当前页面，返回上一页面或多级页面
        navigateBack() {
            wx.navigateBack({
                delta: this.data.go,
            });
        }
    },
    attached() {
        const styles: string[] = []
        if (this.data.fixed) {
            styles.push('position:fixed')
            styles.push('top:' + getStatusBarHeight() + 'px')
        }
        this.setData({
            styles: styles.join(';'),
        })
    }
})