fqsz/pages/theme/theme.js

const app = getApp();

Page({
  data: {
    currentTheme: 0,
    primaryColor: '#E7624F',
    themes: [
      { name: '默认主题', bgColor: '#f8f8f8', textColor: '#333' },
      { name: '深色主题', bgColor: '#333', textColor: '#f5f5f5' },
      { name: '护眼主题', bgColor: '#e6f7ed', textColor: '#333' }
    ],
    colorOptions: [
      '#E7624F', '#4285F4', '#34A853', '#FBBC05', '#EA4335', '#9C27B0'
    ],
    theme: {}
  },

  onLoad: function () {
    const savedTheme = wx.getStorageSync('theme') || app.globalData.theme;
    const currentTheme = savedTheme.currentTheme || 0;
    const primaryColor = savedTheme.primaryColor || '#E7624F';
    
    this.setData({
      currentTheme,
      primaryColor,
      theme: savedTheme
    });

    this.updateNavigationBarColor();

    if (app.eventBus) {
      app.eventBus.on('themeChange', (theme) => {
        this.setData({ theme });
        this.updateNavigationBarColor();
      });
    }
  },

  switchTheme: function(e) {
    this.setData({
      currentTheme: e.currentTarget.dataset.index
    });
  },

  setPrimaryColor: function(e) {
    this.setData({
      primaryColor: e.currentTarget.dataset.color
    });
    this.updateNavigationBarColor();
  },

  applyTheme: function() {
    const { currentTheme, primaryColor, themes } = this.data;
    const newTheme = {
      ...themes[currentTheme],
      primaryColor,
      currentTheme
    };

    wx.setStorageSync('theme', newTheme);
    app.globalData.theme = newTheme;

    if (app.eventBus) {
      app.eventBus.emit('themeChange', newTheme);
    }

    wx.showToast({
      title: '主题应用成功',
      icon: 'success'
    });
    
    setTimeout(() => wx.navigateBack(), 1500);
  },

  // 新增：更新导航栏颜色的方法
  updateNavigationBarColor: function() {
    const { theme, primaryColor } = this.data;
    const textColor = theme.textColor || '#333';
    wx.setNavigationBarColor({
      frontColor: textColor === '#333' ? '#000000' : '#ffffff',
      backgroundColor: primaryColor
    });
  }
});