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<template>
<div v-if="visible" class="captcha-overlay">
<div class="captcha-modal">
<div class="captcha-header">
<h3 class="captcha-title">安全验证</h3>
<button class="close-btn" @click="handleClose">×</button>
</div>
<div class="captcha-content">
<canvas ref="canvasRef" :width="canvasWidth" :height="canvasHeight" class="captcha-canvas"
@click="handleCanvasClick"></canvas>
<div class="captcha-instruction">
<p>
请依次点击 <span class="target-list">{{ targetChars.join('、') }}</span>
</p>
</div>
<div class="captcha-status">
<p v-if="errorMessage" class="error-message">{{ errorMessage }}</p>
<p v-else-if="successMessage" class="success-message">{{ successMessage }}</p>
<p v-else class="status-text">点击图片中的目标文字</p>
</div>
</div>
<div class="captcha-footer">
<button class="refresh-btn" @click="refreshCaptcha" :disabled="isRefreshing">
{{ isRefreshing ? '刷新中...' : '刷新验证' }}
</button>
<button class="confirm-btn" :disabled="clickedList.length < 3 || !!successMessage" @click="handleConfirm">
确认
</button>
</div>
</div>
</div>
</template>
<script setup>
import { ref, onMounted, watch, nextTick } from 'vue'
const props = defineProps({
visible: {
type: Boolean,
default: false,
},
})
const emit = defineEmits(['success', 'close'])
const canvasRef = ref(null)
const canvasWidth = 300
const canvasHeight = 180
const bgImgUrl = '/image/clickCaptcha.jpg' // 可替换为任意背景图
const allChars = ['大', '数', '据', '一', '查', '风', '险', '报', '告']
const targetChars = ref(['一', '查', '查']) // 目标点击顺序固定
const charPositions = ref([]) // [{char, x, y, w, h}]
const clickedIndex = ref(0)
const errorMessage = ref('')
const successMessage = ref('')
const isRefreshing = ref(false)
const clickedList = ref([]) // [{char, idx, ...}]
let currentChars = [] // 当前乱序后的字顺序
function randomChars(count, except = []) {
const pool = allChars.filter(c => !except.includes(c))
const arr = []
while (arr.length < count) {
const c = pool[Math.floor(Math.random() * pool.length)]
if (!arr.includes(c)) arr.push(c)
}
return arr
}
function randomColor() {
return (
'#' +
Math.floor(Math.random() * 0xffffff)
.toString(16)
.padStart(6, '0')
)
}
function drawCaptcha() {
const canvas = canvasRef.value
if (!canvas) return
const ctx = canvas.getContext('2d')
ctx.clearRect(0, 0, canvasWidth, canvasHeight)
// 绘制背景图
const bg = new window.Image()
bg.src = bgImgUrl
bg.onload = () => {
ctx.drawImage(bg, 0, 0, canvasWidth, canvasHeight)
// 绘制乱序文字
charPositions.value.forEach(pos => {
ctx.save()
ctx.translate(pos.x + pos.w / 2, pos.y + pos.h / 2)
ctx.rotate(pos.angle)
ctx.font = 'bold 28px sans-serif'
ctx.fillStyle = pos.color
ctx.shadowColor = '#333'
ctx.shadowBlur = 4
ctx.fillText(pos.char, -pos.w / 2, pos.h / 2 - 8)
ctx.restore()
})
// 绘制点击顺序标签
clickedList.value.forEach((item, i) => {
const pos = charPositions.value[item.idx]
if (!pos) return
ctx.save()
ctx.beginPath()
ctx.arc(pos.x + pos.w / 2, pos.y + 6, 12, 0, 2 * Math.PI)
ctx.fillStyle = '#8CC6F7'
ctx.fill()
ctx.font = 'bold 16px sans-serif'
ctx.fillStyle = '#fff'
ctx.textAlign = 'center'
ctx.textBaseline = 'middle'
ctx.fillText((i + 1).toString(), pos.x + pos.w / 2, pos.y + 6)
ctx.restore()
})
}
}
function refreshCaptcha() {
isRefreshing.value = true
setTimeout(() => {
generateCaptcha()
isRefreshing.value = false
}, 500)
}
function generateCaptcha() {
// 乱序排列7个字
const chars = [...allChars]
for (let i = chars.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1))
;[chars[i], chars[j]] = [chars[j], chars[i]]
}
currentChars = chars
targetChars.value = ['一', '查', '查']
clickedIndex.value = 0
errorMessage.value = ''
successMessage.value = ''
clickedList.value = []
// 生成每个字的坐标、角度、颜色
charPositions.value = []
const used = []
chars.forEach((char, idx) => {
let x,
y,
w = 36,
h = 36,
tryCount = 0
do {
x = Math.random() * (canvasWidth - w - 10) + 5
y = Math.random() * (canvasHeight - h - 10) + 5
tryCount++
} while (used.some(pos => Math.abs(pos.x - x) < w && Math.abs(pos.y - y) < h) && tryCount < 20)
used.push({ x, y })
const angle = (Math.random() - 0.5) * 0.7
const color = randomColor()
charPositions.value.push({ char, x, y, w, h, idx, angle, color })
})
nextTick(drawCaptcha)
}
function handleCanvasClick(e) {
if (successMessage.value) return
// 适配缩放
const rect = canvasRef.value.getBoundingClientRect()
const scaleX = canvasWidth / rect.width
const scaleY = canvasHeight / rect.height
const x = (e.clientX - rect.left) * scaleX
const y = (e.clientY - rect.top) * scaleY
// 找到被点中的字
const posIdx = charPositions.value.findIndex(
pos => x >= pos.x && x <= pos.x + pos.w && y >= pos.y && y <= pos.y + pos.h
)
if (posIdx === -1) {
errorMessage.value = '请点击目标文字'
setTimeout(() => (errorMessage.value = ''), 1200)
return
}
// 已经点过不能重复点
if (clickedList.value.some(item => item.idx === posIdx)) return
if (clickedList.value.length >= charPositions.value.length) return
clickedList.value.push({ char: charPositions.value[posIdx].char, idx: posIdx })
drawCaptcha()
}
function handleConfirm() {
if (clickedList.value.length < 3) {
errorMessage.value = '请依次点击3个字'
setTimeout(() => (errorMessage.value = ''), 1200)
return
}
const userSeq = clickedList.value
.slice(0, 3)
.map(item => item.char)
.join('')
if (userSeq === '真爱查') {
successMessage.value = '验证成功!'
setTimeout(() => emit('success'), 600)
} else {
errorMessage.value = '校验错误,请重试'
setTimeout(() => {
errorMessage.value = ''
clickedList.value = []
// 失败时重新打乱
generateCaptcha()
}, 1200)
}
}
function handleClose() {
emit('close')
}
onMounted(() => {
if (props.visible) generateCaptcha()
})
watch(
() => props.visible,
v => {
if (v) generateCaptcha()
}
)
</script>
<style scoped>
.captcha-overlay {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(0, 0, 0, 0.6);
display: flex;
align-items: center;
justify-content: center;
z-index: 9999;
padding: 1rem;
backdrop-filter: blur(4px);
animation: fadeIn 0.2s ease-out;
}
@keyframes fadeIn {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
.captcha-modal {
background: #fff;
border-radius: 1rem;
width: 100%;
max-width: 360px;
box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05);
overflow: hidden;
animation: slideUp 0.3s ease-out;
}
@keyframes slideUp {
from {
transform: translateY(20px);
opacity: 0;
}
to {
transform: translateY(0);
opacity: 1;
}
}
.captcha-header {
display: flex;
justify-content: space-between;
align-items: center;
padding: 1.25rem 1.5rem;
border-bottom: 1px solid var(--color-border-primary, #ebedf0);
background: linear-gradient(135deg, var(--color-primary-light, rgba(140, 198, 247, 0.1)), #ffffff);
}
.captcha-title {
font-size: 1.125rem;
font-weight: 600;
color: var(--color-text-primary, #323233);
margin: 0;
background: linear-gradient(135deg, var(--color-primary, #8CC6F7), var(--color-primary-600, #709ec6));
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
}
.close-btn {
background: rgba(0, 0, 0, 0.05);
border: none;
font-size: 1.5rem;
color: var(--color-text-secondary, #646566);
cursor: pointer;
padding: 0.375rem;
width: 32px;
height: 32px;
border-radius: 0.5rem;
display: flex;
align-items: center;
justify-content: center;
transition: all 0.2s ease;
line-height: 1;
}
.close-btn:hover {
color: var(--color-text-primary, #323233);
background: rgba(0, 0, 0, 0.1);
transform: rotate(90deg);
}
.captcha-content {
padding: 1.5rem 1.5rem 1rem 1.5rem;
background: #ffffff;
}
.captcha-canvas {
width: 100%;
border-radius: 0.75rem;
background: var(--color-bg-tertiary, #f8f8f8);
display: block;
margin: 0 auto;
border: 2px solid var(--color-border-primary, #ebedf0);
transition: all 0.2s ease;
cursor: pointer;
}
.captcha-canvas:hover {
border-color: var(--color-primary, #8CC6F7);
box-shadow: 0 0 0 3px var(--color-primary-light, rgba(140, 198, 247, 0.1));
}
.captcha-instruction {
margin: 1.25rem 0 0.75rem 0;
text-align: center;
}
.captcha-instruction p {
font-size: 0.95rem;
color: var(--color-text-secondary, #646566);
margin: 0;
line-height: 1.5;
}
.target-list {
color: var(--color-primary, #8CC6F7);
font-weight: 600;
font-size: 1.05rem;
padding: 0.25rem 0.5rem;
background: var(--color-primary-light, rgba(140, 198, 247, 0.1));
border-radius: 0.375rem;
display: inline-block;
}
.captcha-status {
text-align: center;
min-height: 1.75rem;
margin-top: 0.5rem;
}
.error-message {
color: var(--color-danger, #ee0a24);
font-size: 0.875rem;
margin: 0;
padding: 0.5rem;
background: rgba(238, 10, 36, 0.1);
border-radius: 0.5rem;
animation: shake 0.3s ease-in-out;
}
@keyframes shake {
0%,
100% {
transform: translateX(0);
}
25% {
transform: translateX(-5px);
}
75% {
transform: translateX(5px);
}
}
.success-message {
color: var(--color-success, #07c160);
font-size: 0.875rem;
margin: 0;
padding: 0.5rem;
background: rgba(7, 193, 96, 0.1);
border-radius: 0.5rem;
animation: bounce 0.4s ease-out;
}
@keyframes bounce {
0%,
100% {
transform: translateY(0);
}
50% {
transform: translateY(-3px);
}
}
.status-text {
color: var(--color-text-tertiary, #969799);
font-size: 0.875rem;
margin: 0;
}
.captcha-footer {
padding: 1.25rem 1.5rem;
border-top: 1px solid var(--color-border-primary, #ebedf0);
background: var(--color-bg-secondary, #fafafa);
display: flex;
flex-direction: column;
gap: 0.75rem;
}
.refresh-btn {
width: 100%;
padding: 0.875rem;
background: var(--color-primary, #8CC6F7);
color: white;
border: none;
border-radius: 0.625rem;
font-size: 0.95rem;
font-weight: 500;
cursor: pointer;
transition: all 0.2s ease;
box-shadow: 0 2px 8px rgba(140, 198, 247, 0.3);
}
.refresh-btn:hover:not(:disabled) {
background: var(--color-primary-dark, rgba(140, 198, 247, 0.8));
transform: translateY(-1px);
box-shadow: 0 4px 12px rgba(140, 198, 247, 0.4);
}
.refresh-btn:active:not(:disabled) {
transform: translateY(0);
}
.refresh-btn:disabled {
background: var(--color-text-disabled, #c8c9cc);
cursor: not-allowed;
box-shadow: none;
}
.confirm-btn {
width: 100%;
padding: 0.875rem;
background: var(--color-success, #07c160);
color: white;
border: none;
border-radius: 0.625rem;
font-size: 0.95rem;
font-weight: 500;
cursor: pointer;
transition: all 0.2s ease;
box-shadow: 0 2px 8px rgba(7, 193, 96, 0.3);
}
.confirm-btn:hover:not(:disabled) {
background: rgba(7, 193, 96, 0.9);
transform: translateY(-1px);
box-shadow: 0 4px 12px rgba(7, 193, 96, 0.4);
}
.confirm-btn:active:not(:disabled) {
transform: translateY(0);
}
.confirm-btn:disabled {
background: var(--color-text-disabled, #c8c9cc);
cursor: not-allowed;
box-shadow: none;
}
@media (max-width: 480px) {
.captcha-overlay {
padding: 0.75rem;
}
.captcha-modal {
max-width: 100%;
border-radius: 0.875rem;
}
.captcha-header {
padding: 1rem 1.25rem;
}
.captcha-content {
padding: 1.25rem 1.25rem 0.875rem 1.25rem;
}
.captcha-canvas {
min-height: 140px;
}
.captcha-footer {
padding: 1rem 1.25rem;
}
.captcha-instruction p {
font-size: 0.875rem;
}
}
</style>