思路
a，通过后端，获取到图片，这个图片自己定义，随便是撒。
b，通过代码把图片进行随机抠图，扣出一块，形成第二个图，该小图就是为了合并到原有的窟窿中。
c，然后把两个图传到后端，保存抠出的图需要移动的距离到redis，作为验证值。
d，前端根据图的位置展示底图与小图
e，进行移动，完成后进行验证。
后端逻辑
Entity:vcode实体类
@Data
public class Captcha {
/**
* 随机字符串
**/
private String nonceStr;
/**
* 验证值
**/
private String value;
/**
* 生成的画布的base64
**/
private String canvasSrc;
/**
* 画布宽度
**/
private Integer canvasWidth;
/**
* 画布高度
**/
private Integer canvasHeight;
/**
* 生成的阻塞块的base64
**/
private String blockSrc;
/**
* 阻塞块宽度
**/
private Integer blockWidth;
/**
* 阻塞块高度
**/
private Integer blockHeight;
/**
* 阻塞块凸凹半径
**/
private Integer blockRadius;
/**
* 阻塞块的横轴坐标
**/
private Integer blockX;
/**
* 阻塞块的纵轴坐标
**/
private Integer blockY;
/**
* 图片获取位置
**/
private Integer place;
}
service:用于获取大小图层
@Service
public class CaptchaServiceImpl implements CaptchaService {
/**
* 拼图验证码允许偏差
**/
private static Integer ALLOW_DEVIATION = 3;
@Autowired
private StringRedisTemplate stringRedisTemplate;
/**
* 校验验证码
* @param imageKey
* @param imageCode
* @return boolean
**/
public String checkImageCode(String imageKey, String imageCode) {
ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
String text = ops.get("imageCode:" + imageKey);
if(StrUtil.isBlank(text)){
return "验证码已失效";
}
// 根据移动距离判断验证是否成功
if (Math.abs(Integer.parseInt(text) - Integer.parseInt(imageCode)) > ALLOW_DEVIATION) {
return "验证失败，请控制拼图对齐缺口";
}
return null;
}
/**
* 缓存验证码，有效期15分钟
* @param key
* @param code
**/
public void saveImageCode(String key, String code) {
ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
ops.set("imageCode:" + key, code, 15, TimeUnit.MINUTES);
}
/**
* 获取验证码拼图（生成的抠图和带抠图阴影的大图及抠图坐标）
**/
public Captcha getCaptcha(Captcha captcha) {
//参数校验
CaptchaUtils.checkCaptcha(captcha);
//获取画布的宽高
int canvasWidth = captcha.getCanvasWidth();
int canvasHeight = captcha.getCanvasHeight();
//获取阻塞块的宽高/半径
int blockWidth = captcha.getBlockWidth();
int blockHeight = captcha.getBlockHeight();
int blockRadius = captcha.getBlockRadius();
//获取资源图
BufferedImage canvasImage = CaptchaUtils.getBufferedImage(captcha.getPlace());
//调整原图到指定大小
canvasImage = CaptchaUtils.imageResize(canvasImage, canvasWidth, canvasHeight);
//随机生成阻塞块坐标
int blockX = CaptchaUtils.getNonceByRange(blockWidth, canvasWidth - blockWidth - 10);
int blockY = CaptchaUtils.getNonceByRange(10, canvasHeight - blockHeight + 1);
//阻塞块
BufferedImage blockImage = new BufferedImage(blockWidth, blockHeight, BufferedImage.TYPE_4BYTE_ABGR);
//新建的图像根据轮廓图颜色赋值，源图生成遮罩
// CaptchaUtils.cutByTemplate(canvasImage, blockImage, blockWidth, blockHeight, blockRadius, blockX, blockY);
// 移动横坐标
String nonceStr = UUID.randomUUID().toString().replaceAll("-", "");
// 缓存
saveImageCode(nonceStr,String.valueOf(blockX));
//设置返回参数
captcha.setNonceStr(nonceStr);
captcha.setBlockX(blockX);
captcha.setBlockY(blockY);
captcha.setBlockSrc(CaptchaUtils.toBase64(blockImage, "png"));
captcha.setCanvasSrc(CaptchaUtils.toBase64(canvasImage, "png"));
return captcha;
}
}
util:工具类
public class CaptchaUtils {
/**
* 网络图片地址
**/
private static String IMG_URL;
@Value("${params.vcodepath}")
private void setImgUrl(String IMG_URL){
this.IMG_URL = IMG_URL;
}
/**
* 本地图片地址
**/
private final static String IMG_PATH = "D:\\UploadFiles\\vcode\\vcode.jpg";
/**
* 入参校验设置默认值
**/
public static void checkCaptcha(Captcha captcha) {
//设置画布宽度默认值
if (captcha.getCanvasWidth() == null) {
captcha.setCanvasWidth(320);
}
//设置画布高度默认值
if (captcha.getCanvasHeight() == null) {
captcha.setCanvasHeight(155);
}
//设置阻塞块宽度默认值
if (captcha.getBlockWidth() == null) {
captcha.setBlockWidth(65);
}
//设置阻塞块高度默认值
if (captcha.getBlockHeight() == null) {
captcha.setBlockHeight(55);
}
//设置阻塞块凹凸半径默认值
if (captcha.getBlockRadius() == null) {
captcha.setBlockRadius(9);
}
//设置图片来源默认值
if (captcha.getPlace() == null) {
captcha.setPlace(0);
}
}
/**
* 获取指定范围内的随机数
**/
public static int getNonceByRange(int start, int end) {
Random random = new Random();
return random.nextInt(end - start + 1) + start;
}
/**
* 获取验证码资源图
**/
public static BufferedImage getBufferedImage(Integer place) {
try {
//随机图片
int nonce = getNonceByRange(0, 1000);
//获取网络资源图片
if (0 == place) {
String imgUrl = String.format(IMG_URL, nonce);
URL url = new URL(imgUrl);
return ImageIO.read(url.openStream());
}
//获取本地图片
else {
String imgPath = String.format(IMG_PATH, nonce);
File file = new File(imgPath);
return ImageIO.read(file);
}
} catch (Exception e) {
System.out.println("获取拼图资源失败");
//异常处理
return null;
}
}
/**
* 调整图片大小
**/
public static BufferedImage imageResize(BufferedImage bufferedImage, int width, int height) {
Image image = bufferedImage.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage resultImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics2D = resultImage.createGraphics();
graphics2D.drawImage(image, 0, 0, null);
graphics2D.dispose();
return resultImage;
}
/**
* 抠图，并生成阻塞块
**/
public static void cutByTemplate(BufferedImage canvasImage, BufferedImage blockImage, int blockWidth, int blockHeight, int blockRadius, int blockX, int blockY) {
BufferedImage waterImage = new BufferedImage(blockWidth, blockHeight, BufferedImage.TYPE_4BYTE_ABGR);
//阻塞块的轮廓图
int[][] blockData = getBlockData(blockWidth, blockHeight, blockRadius);
//创建阻塞块具体形状
for (int i = 0; i < blockWidth; i++) {
for (int j = 0; j < blockHeight; j++) {
try {
//原图中对应位置变色处理
if (blockData[i][j] == 1) {
//背景设置为黑色
waterImage.setRGB(i, j, Color.BLACK.getRGB());
blockImage.setRGB(i, j, canvasImage.getRGB(blockX + i, blockY + j));
//轮廓设置为白色，取带像素和无像素的界点，判断该点是不是临界轮廓点
if (blockData[i + 1][j] == 0 || blockData[i][j + 1] == 0 || blockData[i - 1][j] == 0 || blockData[i][j - 1] == 0) {
blockImage.setRGB(i, j, Color.WHITE.getRGB());
waterImage.setRGB(i, j, Color.WHITE.getRGB());
}
}
//这里把背景设为透明
else {
blockImage.setRGB(i, j, Color.TRANSLUCENT);
waterImage.setRGB(i, j, Color.TRANSLUCENT);
}
} catch (ArrayIndexOutOfBoundsException e) {
//防止数组下标越界异常
}
}
}
//在画布上添加阻塞块水印
addBlockWatermark(canvasImage, waterImage, blockX, blockY);
}
/**
* 构建拼图轮廓轨迹
**/
private static int[][] getBlockData(int blockWidth, int blockHeight, int blockRadius) {
int[][] data = new int[blockWidth][blockHeight];
double po = Math.pow(blockRadius, 2);
//随机生成两个圆的坐标，在4个方向上 随机找到2个方向添加凸/凹
//凸/凹1
int face1 = RandomUtils.nextInt(0,4);
//凸/凹2
int face2;
//保证两个凸/凹不在同一位置
do {
face2 = RandomUtils.nextInt(0,4);
} while (face1 == face2);
//获取凸/凹起位置坐标
int[] circle1 = getCircleCoords(face1, blockWidth, blockHeight, blockRadius);
int[] circle2 = getCircleCoords(face2, blockWidth, blockHeight, blockRadius);
//随机凸/凹类型
int shape = getNonceByRange(0, 1);
//圆的标准方程 (x-a)²+(y-b)²=r²,标识圆心（a,b）,半径为r的圆
//计算需要的小图轮廓，用二维数组来表示，二维数组有两张值，0和1，其中0表示没有颜色，1有颜色
for (int i = 0; i < blockWidth; i++) {
for (int j = 0; j < blockHeight; j++) {
data[i][j] = 0;
//创建中间的方形区域
if ((i >= blockRadius && i <= blockWidth - blockRadius && j >= blockRadius && j <= blockHeight - blockRadius)) {
data[i][j] = 1;
}
double d1 = Math.pow(i - Objects.requireNonNull(circle1)[0], 2) + Math.pow(j - circle1[1], 2);
double d2 = Math.pow(i - Objects.requireNonNull(circle2)[0], 2) + Math.pow(j - circle2[1], 2);
//创建两个凸/凹
if (d1 <= po || d2 <= po) {
data[i][j] = shape;
}
}
}
return data;
}
/**
* 根据朝向获取圆心坐标
*/
private static int[] getCircleCoords(int face, int blockWidth, int blockHeight, int blockRadius) {
//上
if (0 == face) {
return new int[]{blockWidth / 2 - 1, blockRadius};
}
//左
else if (1 == face) {
return new int[]{blockRadius, blockHeight / 2 - 1};
}
//下
else if (2 == face) {
return new int[]{blockWidth / 2 - 1, blockHeight - blockRadius - 1};
}
//右
else if (3 == face) {
return new int[]{blockWidth - blockRadius - 1, blockHeight / 2 - 1};
}
return null;
}
/**
* 在画布上添加阻塞块水印
*/
private static void addBlockWatermark(BufferedImage canvasImage, BufferedImage blockImage, int x, int y) {
Graphics2D graphics2D = canvasImage.createGraphics();
graphics2D.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.8f));
graphics2D.drawImage(blockImage, x, y, null);
graphics2D.dispose();
}
/**
* BufferedImage转BASE64
*/
public static String toBase64(BufferedImage bufferedImage, String type) {
try {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(bufferedImage, type, byteArrayOutputStream);
String base64 = Base64.getEncoder().encodeToString(byteArrayOutputStream.toByteArray());
return String.format("data:image/%s;base64,%s", type, base64);
} catch (IOException e) {
System.out.println("图片资源转换BASE64失败");
//异常处理
return null;
}
}
}
前端代码
首先需要一个弹窗组件：
<template>
<div class="slide-verify" :style="{width: canvasWidth + 'px'}" onselectstart="return false;">
<!-- 图片加载遮蔽罩 -->
<div :class="{'img-loading': isLoading}" :style="{height: canvasHeight + 'px'}" v-if="isLoading"/>
<!-- 认证成功后的文字提示 -->
<div class="success-hint" :style="{height: canvasHeight + 'px'}" v-if="verifySuccess">{{ successHint }}</div>
<!--刷新按钮-->
<div class="refresh-icon" @click="refresh"/>
<!--前端生成-->
<template v-if="isFrontCheck">
<!--验证图片-->
<canvas ref="canvas" class="slide-canvas" :width="canvasWidth" :height="canvasHeight"/>
<!--阻塞块-->
<canvas ref="block" class="slide-block" :width="canvasWidth" :height="canvasHeight"/>
</template>
<!--后端生成-->
<template v-else>
<!--验证图片-->
<img ref="canvas" class="slide-canvas" :width="canvasWidth" :height="canvasHeight"/>
<!--阻塞块-->
<img ref="block" :class="['slide-block', {'verify-fail': verifyFail}]"/>
</template>
<!-- 滑动条 -->
<div class="slider" :class="{'verify-active': verifyActive, 'verify-success': verifySuccess, 'verify-fail': verifyFail}">
<!--滑块-->
<div class="slider-box" :style="{width: sliderBoxWidth}">
<!-- 按钮 -->
<div class="slider-button" id="slider-button" :style="{left: sliderButtonLeft}">
<!-- 按钮图标 -->
<div class="slider-button-icon"/>
</div>
</div>
<!--滑动条提示文字-->
<span class="slider-hint">{{ sliderHint }}</span>
</div>
</div>
</template>
<script>
function sum(x, y) {
return x + y;
}
function square(x) {
return x * x;
}
import { getCodeImg } from "@/api/login";
export default {
name: 'sliderVerify',
props: {
// 阻塞块长度
blockLength: {
type: Number,
default: 42,
},
// 阻塞块弧度
blockRadius: {
type: Number,
default: 10,
},
// 画布宽度
canvasWidth: {
type: Number,
default: 320,
},
// 画布高度
canvasHeight: {
type: Number,
default: 155,
},
// 滑块操作提示
sliderHint: {
type: String,
default: '向右滑动',
},
// 可允许的误差范围小；为1时，则表示滑块要与凹槽完全重叠，才能验证成功。默认值为5，若为 -1 则不进行机器判断
accuracy: {
type: Number,
default: 3,
},
// 图片资源数组
imageList: {
type: Array,
default: () => [],
},
},
data() {
return {
// 前端校验
isFrontCheck: false,
// 校验进行状态
verifyActive: false,
// 校验成功状态
verifySuccess: false,
// 校验失败状态
verifyFail: false,
// 阻塞块对象
blockObj: null,
// 图片画布对象
canvasCtx: null,
// 阻塞块画布对象
blockCtx: null,
// 阻塞块宽度
blockWidth: this.blockLength * 2,
// 阻塞块的横轴坐标
blockX: undefined,
// 阻塞块的纵轴坐标
blockY: undefined,
// 图片对象
image: undefined,
// 移动的X轴坐标
originX: undefined,
// 移动的Y轴做坐标
originY: undefined,
// 拖动距离数组
dragDistanceList: [],
// 滑块箱拖动宽度
sliderBoxWidth: 0,
// 滑块按钮距离左侧起点位置
sliderButtonLeft: 0,
// 鼠标按下状态
isMouseDown: false,
// 图片加载提示，防止图片没加载完就开始验证
isLoading: true,
// 时间戳，计算滑动时长
timestamp: null,
// 成功提示
successHint: '',
// 随机字符串
nonceStr: undefined,
};
},
mounted() {
this.init();
},
methods: {
/* 初始化*/
init() {
this.initDom();
this.bindEvents();
},
/* 初始化DOM对象*/
initDom() {
this.blockObj = this.$refs.block;
if (this.isFrontCheck) {
this.canvasCtx = this.$refs.canvas.getContext('2d');
this.blockCtx = this.blockObj.getContext('2d');
this.initImage();
} else {
this.getCaptcha();
}
},
/* 后台获取验证码*/
getCaptcha() {
let self = this;
//取后端默认值
const data = {};
getCodeImg(data).then((response) => {
const data = response.data;
self.nonceStr = data.nonceStr;
self.$refs.block.src = data.blockSrc;
self.$refs.block.style.top = data.blockY + 'px';
self.$refs.canvas.src = data.canvasSrc;
}).finally(() => {
self.isLoading = false;
});
},
/* 前端获取验证码*/
initImage() {
const image = this.createImage(() => {
this.drawBlock();
let {canvasWidth, canvasHeight, blockX, blockY, blockRadius, blockWidth} = this;
this.canvasCtx.drawImage(image, 0, 0, canvasWidth, canvasHeight);
this.blockCtx.drawImage(image, 0, 0, canvasWidth, canvasHeight);
// 将抠图防止最左边位置
let yAxle = blockY - blockRadius * 2;
let ImageData = this.blockCtx.getImageData(blockX, yAxle, blockWidth, blockWidth);
this.blockObj.width = blockWidth;
this.blockCtx.putImageData(ImageData, 0, yAxle);
// 图片加载完关闭遮蔽罩
this.isLoading = false;
// 前端校验设置特殊值
this.nonceStr = 'loyer';
});
this.image = image;
},
/* 创建image对象*/
createImage(onload) {
const image = document.createElement('img');
image.crossOrigin = 'Anonymous';
image.onload = onl oad;
image.onerror = () => {
image.src = require('../../assets/images/bgImg.jpg');
};
image.src = this.getImageSrc();
return image;
},
/* 获取imgSrc*/
getImageSrc() {
const len = this.imageList.length;
return len > 0 ? this.imageList[this.getNonceByRange(0, len)] : `https://loyer.wang/view/ftp/wallpaper/${this.getNonceByRange(1, 1000)}.jpg`;
},
/* 根据指定范围获取随机数*/
getNonceByRange(start, end) {
return Math.round(Math.random() * (end - start) + start);
},
/* 绘制阻塞块*/
drawBlock() {
this.blockX = this.getNonceByRange(this.blockWidth + 10, this.canvasWidth - (this.blockWidth + 10));
this.blockY = this.getNonceByRange(10 + this.blockRadius * 2, this.canvasHeight - (this.blockWidth + 10));
this.draw(this.canvasCtx, 'fill');
this.draw(this.blockCtx, 'clip');
},
/* 绘制事件*/
draw(ctx, operation) {
const PI = Math.PI;
let {blockX: x, blockY: y, blockLength: l, blockRadius: r} = this;
// 绘制
ctx.beginPath();
ctx.moveTo(x, y);
ctx.arc(x + l / 2, y - r + 2, r, 0.72 * PI, 2.26 * PI);
ctx.lineTo(x + l, y);
ctx.arc(x + l + r - 2, y + l / 2, r, 1.21 * PI, 2.78 * PI);
ctx.lineTo(x + l, y + l);
ctx.lineTo(x, y + l);
ctx.arc(x + r - 2, y + l / 2, r + 0.4, 2.76 * PI, 1.24 * PI, true);
ctx.lineTo(x, y);
// 修饰
ctx.lineWidth = 2;
ctx.fillStyle = 'rgba(255, 255, 255, 0.9)';
ctx.strokeStyle = 'rgba(255, 255, 255, 0.9)';
ctx.stroke();
ctx[operation]();
ctx.globalCompositeOperation = 'destination-over';
},
/* 事件绑定*/
bindEvents() {
// 监听鼠标按下事件
document.getElementById('slider-button').addEventListener('mousedown', (event) => {
this.startEvent(event.clientX, event.clientY);
});
// 监听鼠标移动事件
document.addEventListener('mousemove', (event) => {
this.moveEvent(event.clientX, event.clientY);
});
// 监听鼠标离开事件
document.addEventListener('mouseup', (event) => {
this.endEvent(event.clientX);
});
// 监听触摸开始事件
document.getElementById('slider-button').addEventListener('touchstart', (event) => {
this.startEvent(event.changedTouches[0].pageX, event.changedTouches[0].pageY);
});
// 监听触摸滑动事件
document.addEventListener('touchmove', (event) => {
this.moveEvent(event.changedTouches[0].pageX, event.changedTouches[0].pageY);
});
// 监听触摸离开事件
document.addEventListener('touchend', (event) => {
this.endEvent(event.changedTouches[0].pageX);
});
},
/* 校验图片是否存在*/
checkImgSrc() {
if (this.isFrontCheck) {
return true;
}
return !!this.$refs.canvas.src;
},
/* 滑动开始事件*/
startEvent(originX, originY) {
if (!this.checkImgSrc() || this.isLoading || this.verifySuccess) {
return;
}
this.originX = originX;
this.originY = originY;
this.isMouseDown = true;
this.timestamp = +new Date();
},
/* 滑动事件*/
moveEvent(originX, originY) {
if (!this.isMouseDown) {
return false;
}
const moveX = originX - this.originX;
const moveY = originY - this.originY;
if (moveX < 0 || moveX + 40 >= this.canvasWidth) {
return false;
}
this.sliderButtonLeft = moveX + 'px';
let blockLeft = (this.canvasWidth - 40 - 20) / (this.canvasWidth - 40) * moveX;
this.blockObj.style.left = blockLeft + 'px';
this.verifyActive = true;
this.sliderBoxWidth = moveX + 'px';
this.dragDistanceList.push(moveY);
},
/* 滑动结束事件*/
endEvent(originX) {
if (!this.isMouseDown) {
return false;
}
this.isMouseDown = false;
if (originX === this.originX) {
return false;
}
// 开始校验
this.isLoading = true;
// 校验结束
this.verifyActive = false;
// 滑动时长
this.timestamp = +new Date() - this.timestamp;
// 移动距离
const moveLength = parseInt(this.blockObj.style.left);
// 限制操作时长10S，超出判断失败
if (this.timestamp > 10000) {
this.verifyFailEvent();
} else
// 人为操作判定
if (!this.turingTest()) {
this.verifyFail = true;
this.$emit('again');
} else
// 是否前端校验
if (this.isFrontCheck) {
const accuracy = this.accuracy <= 1 ? 1 : this.accuracy > 10 ? 10 : this.accuracy; // 容错精度值
const spliced = Math.abs(moveLength - this.blockX) <= accuracy; // 判断是否重合
if (!spliced) {
this.verifyFailEvent();
} else {
// 设置特殊值，后台特殊处理，直接验证通过
this.$emit('success', {nonceStr: this.nonceStr, value: moveLength});
}
} else {
this.$emit('success', {nonceStr: this.nonceStr, value: moveLength});
}
},
/* 图灵测试*/
turingTest() {
const arr = this.dragDistanceList; // 拖动距离数组
const average = arr.reduce(sum) / arr.length; // 平均值
const deviations = arr.map((x) => x - average); // 偏离值
const stdDev = Math.sqrt(deviations.map(square).reduce(sum) / arr.length); // 标准偏差
return average !== stdDev; // 判断是否人为操作
},
/* 校验成功*/
verifySuccessEvent() {
this.isLoading = false;
this.verifySuccess = true;
const elapsedTime = (this.timestamp / 1000).toFixed(1);
if (elapsedTime < 1) {
this.successHint = `仅仅${elapsedTime}S，你的速度快如闪电`;
} else if (elapsedTime < 2) {
this.successHint = `只用了${elapsedTime}S，这速度简直完美`;
} else {
this.successHint = `耗时${elapsedTime}S，争取下次再快一点`;
}
},
/* 校验失败*/
verifyFailEvent(msg) {
this.verifyFail = true;
this.$emit('fail', msg);
this.refresh();
},
/* 刷新图片验证码*/
refresh() {
// 延迟class的删除，等待动画结束
setTimeout(() => {
this.verifyFail = false;
}, 500);
this.isLoading = true;
this.verifyActive = false;
this.verifySuccess = false;
this.blockObj.style.left = 0;
this.sliderBoxWidth = 0;
this.sliderButtonLeft = 0;
if (this.isFrontCheck) {
// 刷新画布
let {canvasWidth, canvasHeight} = this;
this.canvasCtx.clearRect(0, 0, canvasWidth, canvasHeight);
this.blockCtx.clearRect(0, 0, canvasWidth, canvasHeight);
this.blockObj.width = canvasWidth;
// 刷新图片
this.image.src = this.getImageSrc();
} else {
this.getCaptcha();
}
},
},
};
</script>
<style scoped>
.slide-verify {
position: relative;
}
/*图片加载样式*/
.img-loading {
position: absolute;
top: 0;
right: 0;
left: 0;
bottom: 0;
z-index: 999;
animation: loading 1.5s infinite;
background-image: url(../../assets/images/loading.svg);
background-repeat: no-repeat;
background-position: center center;
background-size: 100px;
background-color: #737c8e;
border-radius: 5px;
}
@keyframes loading {
0% {
opacity: .7;
}
100% {
opacity: 9;
}
}
/*认证成功后的文字提示*/
.success-hint {
position: absolute;
top: 0;
right: 0;
left: 0;
z-index: 999;
display: flex;
align-items: center;
justify-content: center;
background: rgba(255, 255, 255, 0.8);
color: #2CD000;
font-size: large;
}
/*刷新按钮*/
.refresh-icon {
position: absolute;
right: 0;
top: 0;
width: 35px;
height: 35px;
cursor: pointer;
background: url("../../assets/images/light.png") 0 -432px;
background-size: 35px 470px;
}
/*验证图片*/
.slide-canvas {
border-radius: 5px;
}
/*阻塞块*/
.slide-block {
position: absolute;
left: 0;
top: 0;
}
/*校验失败时的阻塞块样式*/
.slide-block.verify-fail {
transition: left 0.5s linear;
}
/*滑动条*/
.slider {
position: relative;
text-align: center;
width: 100%;
height: 40px;
line-height: 40px;
margin-top: 15px;
background: #f7f9fa;
color: #45494c;
border: 1px solid #e4e7eb;
border-radius: 5px;
}
/*滑动盒子*/
.slider-box {
position: absolute;
left: 0;
top: 0;
height: 40px;
border: 0 solid #1991FA;
background: #D1E9FE;
border-radius: 5px;
}
/*滑动按钮*/
.slider-button {
position: absolute;
top: 0;
left: 0;
width: 40px;
height: 40px;
background: #fff;
box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
cursor: pointer;
transition: background .2s linear;
border-radius: 5px;
}
/*鼠标悬浮时的按钮样式*/
.slider-button:hover {
background: #1991FA
}
/*鼠标悬浮时的按钮图标样式*/
.slider-button:hover .slider-button-icon {
background-position: 0 -13px
}
/*滑动按钮图标*/
.slider-button-icon {
position: absolute;
top: 15px;
left: 13px;
width: 15px;
height: 13px;
background: url("../../assets/images/light.png") 0 -26px;
background-size: 35px 470px
}
/*校验时的按钮样式*/
.verify-active .slider-button {
height: 38px;
top: -1px;
border: 1px solid #1991FA;
}
/*校验时的滑动箱样式*/
.verify-active .slider-box {
height: 38px;
border-width: 1px;
}
/*校验成功时的滑动箱样式*/
.verify-success .slider-box {
height: 38px;
border: 1px solid #52CCBA;
background-color: #D2F4EF;
}
/*校验成功时的按钮样式*/
.verify-success .slider-button {
height: 38px;
top: -1px;
border: 1px solid #52CCBA;
background-color: #52CCBA !important;
}
/*校验成功时的按钮图标样式*/
.verify-success .slider-button-icon {
background-position: 0 0 !important;
}
/*校验失败时的滑动箱样式*/
.verify-fail .slider-box {
height: 38px;
border: 1px solid #f57a7a;
background-color: #fce1e1;
transition: width 0.5s linear;
}
/*校验失败时的按钮样式*/
.verify-fail .slider-button {
height: 38px;
top: -1px;
border: 1px solid #f57a7a;
background-color: #f57a7a !important;
transition: left 0.5s linear;
}
/*校验失败时的按钮图标样式*/
.verify-fail .slider-button-icon {
top: 14px;
background-position: 0 -82px !important;
}
/*校验状态下的提示文字隐藏*/
.verify-active .slider-hint,
.verify-success .slider-hint,
.verify-fail .slider-hint {
display: none;
}
</style>
如何使用：你需要在登录页面引入：
import sliderVerify from '@/components/common/sliderVerify.vue';不要忘记注册：components: {
sliderVerify }
使用：这里是uniapp的弹出层，也可以使用其他弹出组件
<!--滑块验证-->
<u-popup v-model="isShowSliderVerify" mode="center" border-radius="14" negative-top="" @close="refresh">
<text class="movetitle">请拖动滑块完成拼图</text>
<view>
<slider-verify ref="sliderVerify" :place="1" @success="onSuccess" @fail="onFail" @again="onAgain"/>
</view>
</u-popup>
onSuccess:滑动验证完成回调函数
onFail:滑动验证失败回调函数
onAgain:校验是否人为
就这样，可能不是很好，自己改进就行。验证方法自己写就行。
原文章地址：
https://www.cnblogs.com/wxsclob/articles/17746938.html