合并代码

src/utils/getNavbarHeight.ts

@@ -0,0 +1,13 @@
+import Taro from "@tarojs/taro";
+
+export const getNavbarHeight = (): { statusBarHeight: number; navbarHeight: number; totalHeight: number; } => {
+  const systemInfo = Taro.getSystemInfoSync();
+  const statusBarHeight = systemInfo?.statusBarHeight || 0;
+  const isIOS = systemInfo.platform === "ios";
+  const navbarHeight = isIOS ? 44 : 48;
+  return {
+    statusBarHeight,
+    navbarHeight,
+    totalHeight: statusBarHeight + navbarHeight,
+  };
+};

src/utils/index.ts

@@ -0,0 +1,9 @@
+export * from './getNavbarHeight'
+export * from './locationUtils'
+export * from './processImage'
+export * from './timeUtils'
+export * from './tokenManager'
+
+export function delay(ms: number) {
+  return new Promise(resolve => setTimeout(resolve, ms))
+}

src/utils/processImage.ts

@@ -0,0 +1,33 @@
+export async function getTextColorOnImage(url) {
+  let canvas
+  const width = 100
+  const height = 50
+  try {
+    // 1. 创建离屏Canvas
+    canvas = wx.createOffscreenCanvas({ type: '2d', width, height })
+    const ctx = canvas.getContext('2d')
+
+    // 2. 加载图片
+    const img = canvas.createImage()
+    await new Promise((resolve) => {
+      img.onload = resolve
+      img.src = url
+    })
+
+    // 3. 绘制并分析图像
+    ctx.drawImage(img, 0, 0, width, height)
+
+    // TODO: 增加取样，提高精确性
+    const pixelData = ctx.getImageData(10, 10, 1, 1).data
+
+    // 4. 计算文字颜色
+    const brightness = (pixelData[0] * 2126 + pixelData[1] * 7152 + pixelData[2] * 722) / 10000
+    return { textColor: brightness > 128 ? 'black' : 'white' }
+  } finally {
+    // 释放资源
+    if (canvas) {
+      canvas.width = 0;
+      canvas.height = 0;
+    }
+  }
+}