soul-yongping/miniprogram/pages/link-preview/link-preview.js

const app = getApp()

Page({
  data: {
    url: '',
    title: '链接预览',
    statusBarHeight: 44,
    navBarHeight: 88,
    loadError: false,
  },

  onLoad(options) {
    const url = decodeURIComponent(options.url || '')
    const title = options.title ? decodeURIComponent(options.title) : '链接预览'
    this.setData({
      url,
      title,
      statusBarHeight: app.globalData.statusBarHeight || 44,
      navBarHeight: app.globalData.navBarHeight || 88,
    })
  },

  onWebViewError() {
    this.setData({ loadError: true })
    wx.showModal({
      title: '无法在小程序内打开',
      content: '该链接无法在小程序内预览，是否复制链接到浏览器打开？',
      confirmText: '复制链接',
      cancelText: '返回',
      success: (res) => {
        if (res.confirm) {
          wx.setClipboardData({
            data: this.data.url,
            success: () => wx.showToast({ title: '链接已复制，请在浏览器打开', icon: 'none', duration: 2000 }),
          })
        } else {
          this.goBack()
        }
      },
    })
  },

  goBack() {
    const pages = getCurrentPages()
    if (pages.length > 1) {
      wx.navigateBack()
    } else {
      wx.switchTab({ url: '/pages/index/index' })
    }
  },

  copyLink() {
    const url = (this.data.url || '').trim()
    if (!url) {
      wx.showToast({ title: '暂无可复制链接', icon: 'none' })
      return
    }
    wx.setClipboardData({
      data: url,
      success: () => wx.showToast({ title: '链接已复制', icon: 'none' }),
    })
  },
})