无需引入 pixelmatch 库，vue2实现找不同游戏整套代码

好的，以下是一个简单的找不同游戏的示例代码，使用Vue2实现：

<template>
  <div class="game-container">
    <div class="image-container">
      <img :src="images[0]" class="image">
      <img :src="images[1]" class="image difference" @click="checkDifference">
    </div>
    <div class="feedback-container">
      <div v-if="differenceFound" class="feedback correct">Correct!</div>
      <div v-if="!differenceFound && differenceChecked" class="feedback incorrect">Incorrect, please try again.</div>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      images: [
        "https://example.com/image1.png",
        "https://example.com/image2.png"
      ],
      differenceFound: false,
      differenceChecked: false
    };
  },
  methods: {
    checkDifference() {
      // Compare images pixel by pixel to check for differences
      const img1 = new Image();
      const img2 = new Image();
      img1.src = this.images[0];
      img2.src = this.images[1];
      const canvas = document.createElement("canvas");
      const ctx = canvas.getContext("2d");
      img1.onload = () => {
        canvas.width = img1.width;
        canvas.height = img1.height;
        ctx.drawImage(img1, 0, 0);
        img2.onload = () => {
          ctx.globalCompositeOperation = "difference";
          ctx.drawImage(img2, 0, 0);
          const diff = ctx.getImageData(0, 0, canvas.width, canvas.height).data.reduce((a, b) => a + b, 0);
          if (diff === 0) {
            this.differenceFound = true;
          } else {
            this.differenceChecked = true;
          }
        };
      };
    }
  }
};
</script>

<style>
.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.image-container {
  position: relative;
}

.image {
  max-width: 100%;
}

.difference {
  position: absolute;
  top: 0;
  left: 0;
  cursor: pointer;
}

.feedback-container {
  margin-top: 20px;
}

.feedback {
  font-size: 18px;
  padding: 10px;
  border-radius: 5px;
}

.correct {
  background-color: green;
  color: white;
}

.incorrect {
  background-color: red;
  color: white;
}
</style>

这个示例代码中，我们使用了两张图片来实现找不同游戏。其中，一张图片是原图，另一张图片是在原图上添加了一个差异的图片。通过点击添加了差异的图片来检查是否找到了差异。如果找到了差异，则显示“Correct!”的反馈，否则显示“Incorrect, please try again.”的反馈。

在checkDifference方法中，我们使用了HTML5 Canvas来比较两张图片的像素，以检查它们之间是否存在差异。如果没有差异，则将differenceFound设置为true，否则将differenceChecked设置为true，以便在用户再次尝试时显示错误的反馈。

需要注意的是，这个示例代码中图片的URL是假的，需要替换成你自己的图片URL。