增加字体大小设置

utils/fontSize.js

@@ -0,0 +1,57 @@
+/**
+ * 字体大小工具函数
+ * 提供响应式字体大小计算能力
+ */
+
+const FONT_BASE = 16 // Android 默认字体大小基准
+const MIN_SCALE = 0.85
+const MAX_SCALE = 1.45
+
+/**
+ * 获取当前字体缩放比例
+ * @returns {number} 缩放比例 (0.85 ~ 1.45)
+ */
+function getFontScale() {
+  if (getApp().globalData && getApp().globalData.fontScale) {
+    return getApp().globalData.fontScale
+  }
+  
+  const stored = uni.getStorageSync('fontScale')
+  if (stored) {
+    return parseFloat(stored)
+  }
+  
+  return 1
+}
+
+/**
+ * 计算响应式字体大小
+ * @param {number} basePx - 基础字体大小(px)
+ * @param {boolean} round - 是否四舍五入取整
+ * @returns {string} - 如 "15px" 或 "14.5px"
+ */
+function responsiveSize(basePx, round = true) {
+  const scale = getFontScale()
+  const size = basePx * scale
+  
+  if (round) {
+    return `${Math.round(size)}px`
+  }
+  return `${Math.round(size * 10) / 10}px`
+}
+
+export default {
+  getFontScale,
+  responsiveSize,
+  
+  // 常用预设
+  presets: {
+    xs: () => responsiveSize(10),
+    sm: () => responsiveSize(11),
+    base: () => responsiveSize(13),
+    md: () => responsiveSize(14),
+    lg: () => responsiveSize(16),
+    xl: () => responsiveSize(20),
+    xxl: () => responsiveSize(24)
+  }
+}