vue图片滑动验证
阳光下的雨u 人气:0效果图：
1、引用自定义组件
import img0 from '../assets/img.jpg';
import img1 from '../assets/img1.jpg';
import img2 from '../assets/img2.jpg';
import img3 from '../assets/img3.jpg';
import img4 from '../assets/img4.jpg';
import img5 from '../assets/img5.jpg';
import solide from "../conponents/phptoSlide"
components: {
solide
},2、使用
<solide ref="slideblock" @success="onSuccess" @again="onAgain" @fulfilled="onFulfilled"
@fail="onFail" @refresh="onRefresh" :slider-text="text" :imgs="imgs" :accuracy="accuracy">
</solide>
data () {
return {
msg: '',
text: '向右滑动->',
imgs: [
img0,
img1,
img2,
img3,
img4,
img5,
],
loginBtn: false,
accuracy: 1, // 精确度小，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
formLabelAlign: {},
}
}
methods: {
onSuccess (times) {
// console.log('验证通过');
this.loginBtn = true;
this.msg = `login success, 耗时${(times / 1000).toFixed(1)}s`;
},
onFail () {
// console.log('验证不通过');
this.msg = ''
},
onRefresh () {
// console.log('点击了刷新小图标');
this.msg = ''
},
onFulfilled () {
// console.log('刷新成功啦！');
},
onAgain () {
// console.log('检测到非人为操作的哦！');
this.msg = 'try again';
// 刷新
this.handleClick();
},
handleClick () {
this.$refs.slideblock.reset();
this.msg = ''
},
}3、自定义组件文件
<template>
<div class="slide-verify" :style="{width: w + 'px'}" id="slideVerify" onselectstart="return false;">
<!-- 图片加载遮蔽罩 -->
<div :class="{'slider-verify-loading': loadBlock}"></div>
<canvas :width="w" :height="h" ref="canvas"></canvas>
<div v-if="show" @click="refresh" class="slide-verify-refresh-icon"></div>
<canvas :width="w" :height="h" ref="block" class="slide-verify-block"></canvas>
<!-- container -->
<div class="slide-verify-slider" :class="{'container-active': containerActive, 'container-success': containerSuccess, 'container-fail': containerFail}">
<div class="slide-verify-slider-mask" :style="{width: sliderMaskWidth}">
<!-- slider -->
<div @mousedown="sliderDown" @touchstart="touchStartEvent" @touchmove="touchMoveEvent" @touchend="touchEndEvent" class="slide-verify-slider-mask-item" :style="{left: sliderLeft}">
<div class="slide-verify-slider-mask-item-icon"></div>
</div>
</div>
<span class="slide-verify-slider-text">{{sliderText}}</span>
</div>
</div>
</template>
<script>
const PI = Math.PI;
function sum (x, y) {
return x + y
}
function square (x) {
return x * x
}
export default {
name: 'SlideVerify',
props: {
// block length
l: {
type: Number,
default: 30,
},
// block radius
r: {
type: Number,
default: 6,
},
// canvas width
w: {
type: Number,
default: 270,
},
// canvas height
h: {
type: Number,
default: 90,
},
sliderText: {
type: String,
default: 'Slide filled right',
},
accuracy: {
type: Number,
default: 5, // 若为 -1 则不进行机器判断
},
show: {
type: Boolean,
default: true,
},
imgs: {
type: Array,
default: () => [],
},
},
data () {
return {
containerActive: false, // container active class
containerSuccess: false, // container success class
containerFail: false, // container fail class
canvasCtx: null,
blockCtx: null,
block: null,
block_x: undefined, // container random position
block_y: undefined,
L: this.l + this.r * 2 + 3, // block real lenght
img: undefined,
originX: undefined,
originY: undefined,
isMouseDown: false,
trail: [],
sliderLeft: 0, // block right offset
sliderMaskWidth: 0, // mask width,
success: false, // Bug Fixes 修复了验证成功后还能滑动
loadBlock: true, // Features 图片加载提示，防止图片没加载完就开始验证
timestamp: null,
}
},
mounted () {
this.init()
},
methods: {
init () {
this.initDom()
this.initImg()
this.bindEvents()
},
initDom () {
this.block = this.$refs.block;
this.canvasCtx = this.$refs.canvas.getContext('2d')
this.blockCtx = this.block.getContext('2d')
},
initImg () {
const img = this.createImg(() => {
// 图片加载完关闭遮蔽罩
this.loadBlock = false;
this.drawBlock()
this.canvasCtx.drawImage(img, 0, 0, this.w, this.h)
this.blockCtx.drawImage(img, 0, 0, this.w, this.h)
let {
block_x: x,
block_y: y,
r,
L
} = this
let _y = y - r * 2 - 1
let ImageData = this.blockCtx.getImageData(x, _y, L, L);
this.block.width = L;
this.blockCtx.putImageData(ImageData, 0, _y)
});
this.img = img;
},
drawBlock () {
this.block_x = this.getRandomNumberByRange(this.L + 10, this.w - (this.L + 10))
this.block_y = this.getRandomNumberByRange(10 + this.r * 2, this.h - (this.L + 10))
this.draw(this.canvasCtx, this.block_x, this.block_y, 'fill')
this.draw(this.blockCtx, this.block_x, this.block_y, 'clip')
},
draw (ctx, x, y, operation) {
let {
l,
r
} = this;
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)
ctx.lineWidth = 2
ctx.fillStyle = 'rgba(255, 255, 255, 0.7)'
ctx.strokeStyle = 'rgba(255, 255, 255, 0.7)'
ctx.stroke()
ctx[operation]()
// Bug Fixes 修复了火狐和ie显示问题
ctx.globalCompositeOperation = "destination-over"
},
createImg (onload) {
const img = document.createElement('img');
img.crossOrigin = "Anonymous";
img.onload = onload;
img.onerror = () => {
img.src = this.getRandomImg()
}
img.src = this.getRandomImg()
return img;
},
// 随机生成img src
getRandomImg () {
// return require('../assets/img.jpg')
const len = this.imgs.length;
return len > 0 ?
this.imgs[this.getRandomNumberByRange(0, len)] :
'http://picsum.photos/300/150/?image=' + this.getRandomNumberByRange(0, 1084);
},
getRandomNumberByRange (start, end) {
return Math.round(Math.random() * (end - start) + start)
},
refresh () {
this.reset()
this.$emit('refresh')
},
sliderDown (event) {
if (this.success) return;
this.originX = event.clientX;
this.originY = event.clientY;
this.isMouseDown = true;
this.timestamp = + new Date();
},
touchStartEvent (e) {
if (this.success) return;
this.originX = e.changedTouches[0].pageX;
this.originY = e.changedTouches[0].pageY;
this.isMouseDown = true;
this.timestamp = + new Date();
},
bindEvents () {
document.addEventListener('mousemove', (e) => {
if (!this.isMouseDown) return false;
const moveX = e.clientX - this.originX;
const moveY = e.clientY - this.originY;
if (moveX < 0 || moveX + 38 >= this.w) return false;
this.sliderLeft = moveX + 'px';
let blockLeft = (this.w - 40 - 20) / (this.w - 40) * moveX;
this.block.style.left = blockLeft + 'px';
this.containerActive = true; // add active
this.sliderMaskWidth = moveX + 'px';
this.trail.push(moveY);
});
document.addEventListener('mouseup', (e) => {
if (!this.isMouseDown) return false
this.isMouseDown = false
if (e.clientX === this.originX) return false;
this.containerActive = false; // remove active
this.timestamp = + new Date() - this.timestamp;
const {
spliced,
TuringTest
} = this.verify();
if (spliced) {
if (this.accuracy === -1) {
this.containerSuccess = true;
this.success = true;
this.$emit('success', this.timestamp);
return;
}
if (TuringTest) {
// succ
this.containerSuccess = true;
this.success = true;
this.$emit('success', this.timestamp)
} else {
this.containerFail = true;
this.$emit('again')
}
} else {
this.containerFail = true;
this.$emit('fail')
setTimeout(() => {
this.reset()
}, 1000)
}
})
},
touchMoveEvent (e) {
if (!this.isMouseDown) return false;
const moveX = e.changedTouches[0].pageX - this.originX;
const moveY = e.changedTouches[0].pageY - this.originY;
if (moveX < 0 || moveX + 38 >= this.w) return false;
this.sliderLeft = moveX + 'px';
let blockLeft = (this.w - 40 - 20) / (this.w - 40) * moveX;
this.block.style.left = blockLeft + 'px';
this.containerActive = true;
this.sliderMaskWidth = moveX + 'px';
this.trail.push(moveY);
},
touchEndEvent (e) {
if (!this.isMouseDown) return false
this.isMouseDown = false
if (e.changedTouches[0].pageX === this.originX) return false;
this.containerActive = false;
this.timestamp = + new Date() - this.timestamp;
const {
spliced,
TuringTest
} = this.verify();
if (spliced) {
if (this.accuracy === -1) {
this.containerSuccess = true;
this.success = true;
this.$emit('success', this.timestamp);
return;
}
if (TuringTest) {
// succ
this.containerSuccess = true;
this.success = true;
this.$emit('success', this.timestamp)
} else {
this.containerFail = true;
this.$emit('again')
}
} else {
this.containerFail = true;
this.$emit('fail')
setTimeout(() => {
this.reset()
}, 1000)
}
},
verify () {
const arr = this.trail // drag y move distance
const average = arr.reduce(sum) / arr.length // average
const deviations = arr.map(x => x - average) // deviation array
const stddev = Math.sqrt(deviations.map(square).reduce(sum) / arr.length) // standard deviation
const left = parseInt(this.block.style.left)
const accuracy = this.accuracy <= 1 ? 1 : this.accuracy > 10 ? 10 : this.accuracy;
return {
spliced: Math.abs(left - this.block_x) <= accuracy,
TuringTest: average !== stddev, // equal => not person operate
}
},
reset () {
this.success = false;
this.containerActive = false;
this.containerSuccess = false;
this.containerFail = false;
this.sliderLeft = 0;
this.block.style.left = 0;
this.sliderMaskWidth = 0;
// canvas
let {
w,
h
} = this;
this.canvasCtx.clearRect(0, 0, w, h)
this.blockCtx.clearRect(0, 0, w, h)
this.block.width = w
// generate img
this.img.src = this.getRandomImg();
this.$emit('fulfilled')
},
}
}
</script>
<style scoped>
.slide-verify {
position: relative;
}
/* 图片加载样式 */
.slider-verify-loading {
position: absolute;
top: 0;
right: 0;
left: 0;
bottom: 0;
background: rgba(255, 255, 255, 0.9);
z-index: 999;
animation: loading 1.5s infinite;
}
@keyframes loading {
0% {
opacity: 0.7;
}
100% {
opacity: 9;
}
}
.slide-verify-block {
position: absolute;
left: 0;
top: 0;
}
.slide-verify-refresh-icon {
position: absolute;
right: 0;
top: 0;
width: 34px;
height: 34px;
cursor: pointer;
background: url("../assets/icon_light.png") 0 -437px;
background-size: 34px 471px;
}
.slide-verify-slider {
position: relative;
text-align: center;
width: 100%;
height: 40px;
line-height: 40px;
/* margin-top: 15px; */
background: #f7f9fa;
color: #45494c;
border: 1px solid #e4e7eb;
}
.slide-verify-slider-mask {
position: absolute;
left: 0;
top: 0;
height: 40px;
border: 0 solid #1991fa;
background: #d1e9fe;
}
.slide-verify-slider-mask-item {
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 0.2s linear;
}
.slide-verify-slider-mask-item:hover {
background: #1991fa;
}
.slide-verify-slider-mask-item:hover .slide-verify-slider-mask-item-icon {
background-position: 0 -13px;
}
.slide-verify-slider-mask-item-icon {
position: absolute;
top: 15px;
left: 13px;
width: 14px;
height: 12px;
background: url("../assets/icon_light.png") 0 -26px;
background-size: 34px 471px;
}
.container-active .slide-verify-slider-mask-item {
height: 38px;
top: -1px;
border: 1px solid #1991fa;
}
.container-active .slide-verify-slider-mask {
height: 38px;
border-width: 1px;
}
.container-success .slide-verify-slider-mask-item {
height: 38px;
top: -1px;
border: 1px solid #52ccba;
background-color: #52ccba !important;
}
.container-success .slide-verify-slider-mask {
height: 38px;
border: 1px solid #52ccba;
background-color: #d2f4ef;
}
.container-success .slide-verify-slider-mask-item-icon {
background-position: 0 0 !important;
}
.container-fail .slide-verify-slider-mask-item {
height: 38px;
top: -1px;
border: 1px solid #f57a7a;
background-color: #f57a7a !important;
}
.container-fail .slide-verify-slider-mask {
height: 38px;
border: 1px solid #f57a7a;
background-color: #fce1e1;
}
.container-fail .slide-verify-slider-mask-item-icon {
top: 14px;
background-position: 0 -82px !important;
}
.container-active .slide-verify-slider-text,
.container-success .slide-verify-slider-text,
.container-fail .slide-verify-slider-text {
display: none;
}
</style>加载全部内容