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效果图：
1.html代码
1 <div class="form-group" style="display: flex;"> 2 <div> 3 <span>验证码：</span> 4 <input type="text" id="code" v-model="code" class="code" placeholder="请输入您的验证码" /> 5 </div> 6 <div class="login-code" @click="refreshcode"> 7 <!--验证码组件--> 8 <s-identify :identifycode="identifycode"></s-identify> 9 </div> 10 </div>
2.css样式
我要评论1 /*验证码样式*/
2 .code{
3 width:124px;
4 height:31px;
5 border:1px solid rgba(186,186,186,1);
6 }
7 .login-code{
8 cursor: pointer;
9 }
3.js引入验证码组件,并且定义三个变量。
import sidentify from '../components/sidentify'
components: { sidentify },
data () {
return {
identifycodes: "1234567890",
identifycode: "",
code:"",//text框输入的验证码
}
},
4.mounted里的代码
1 mounted(){
2 this.identifycode = "";
3 this.makecode(this.identifycodes, 4);
4 },
5.在created里初始化验证码
6.methods里添加以下方法。
1 //验证码
2 randomnum(min, max) {
3 return math.floor(math.random() * (max - min) + min);
4 },
5
6 refreshcode() {
7 this.identifycode = "";
8 this.makecode(this.identifycodes, 4);
9 },
10 makecode(o, l) {
11 for (let i = 0; i < l; i++) {
12 this.identifycode += this.identifycodes[
13 this.randomnum(0, this.identifycodes.length)
14 ];
15 }
16 console.log(this.identifycode);
17 },
在提交表单的时候对验证码进行判断。
sidentify.vue组件代码：
代码：
1 <template>
2 <div class="s-canvas">
3 <canvas id="s-canvas" :width="contentwidth" :height="contentheight"></canvas>
4 </div>
5 </template>
6 <script>
7 export default {
8 name: 'sidentify',
9 props: {
10 identifycode: {
11 type: string,
12 default: '1234'
13 },
14 fontsizemin: {
15 type: number,
16 default: 25
17 },
18 fontsizemax: {
19 type: number,
20 default: 30
21 },
22 backgroundcolormin: {
23 type: number,
24 default: 255
25 },
26 backgroundcolormax: {
27 type: number,
28 default: 255
29 },
30 colormin: {
31 type: number,
32 default: 0
33 },
34 colormax: {
35 type: number,
36 default: 160
37 },
38 linecolormin: {
39 type: number,
40 default: 100
41 },
42 linecolormax: {
43 type: number,
44 default: 255
45 },
46 dotcolormin: {
47 type: number,
48 default: 0
49 },
50 dotcolormax: {
51 type: number,
52 default: 255
53 },
54 contentwidth: {
55 type: number,
56 default: 112
57 },
58 contentheight: {
59 type: number,
60 default: 31
61 }
62 },
63 methods: {
64 // 生成一个随机数
65 randomnum(min, max) {
66 return math.floor(math.random() * (max - min) + min)
67 },
68 // 生成一个随机的颜色
69 randomcolor(min, max) {
70 let r = this.randomnum(min, max)
71 let g = this.randomnum(min, max)
72 let b = this.randomnum(min, max)
73 return 'rgb(' + r + ',' + g + ',' + b + ')'
74 },
75 drawpic() {
76 let canvas = document.getelementbyid('s-canvas')
77 let ctx = canvas.getcontext('2d')
78 ctx.textbaseline = 'bottom'
79 // 绘制背景
80 ctx.fillstyle = this.randomcolor(this.backgroundcolormin, this.backgroundcolormax)
81 ctx.fillrect(0, 0, this.contentwidth, this.contentheight)
82 // 绘制文字
83 for (let i = 0; i < this.identifycode.length; i++) {
84 this.drawtext(ctx, this.identifycode[i], i)
85 }
86 this.drawline(ctx)
87 this.drawdot(ctx)
88 },
89 drawtext(ctx, txt, i) {
90 ctx.fillstyle = this.randomcolor(this.colormin, this.colormax)
91 ctx.font = this.randomnum(this.fontsizemin, this.fontsizemax) + 'px simhei'
92 let x = (i + 1) * (this.contentwidth / (this.identifycode.length + 1))
93 let y = this.randomnum(this.fontsizemax, this.contentheight - 5)
94 var deg = this.randomnum(-45, 45)
95 // 修改坐标原点和旋转角度
96 ctx.translate(x, y)
97 ctx.rotate(deg * math.pi / 180)
98 ctx.filltext(txt, 0, 0)
99 // 恢复坐标原点和旋转角度
100 ctx.rotate(-deg * math.pi / 180)
101 ctx.translate(-x, -y)
102 },
103 drawline(ctx) {
104 // 绘制干扰线
105 for (let i = 0; i < 5; i++) {
106 ctx.strokestyle = this.randomcolor(this.linecolormin, this.linecolormax)
107 ctx.beginpath()
108 ctx.moveto(this.randomnum(0, this.contentwidth), this.randomnum(0, this.contentheight))
109 ctx.lineto(this.randomnum(0, this.contentwidth), this.randomnum(0, this.contentheight))
110 ctx.stroke()
111 }
112 },
113 drawdot(ctx) {
114 // 绘制干扰点
115 for (let i = 0; i < 80; i++) {
116 ctx.fillstyle = this.randomcolor(0, 255)
117 ctx.beginpath()
118 ctx.arc(this.randomnum(0, this.contentwidth), this.randomnum(0, this.contentheight), 1, 0, 2 * math.pi)
119 ctx.fill()
120 }
121 }
122 },
123 watch: {
124 identifycode() {
125 this.drawpic()
126 }
127 },
128 mounted() {
129 this.drawpic()
130 }
131 }
132 </script>
133 <style scoped>
134 .s-canvas {
135 height: 38px;
136
137 }
138 .s-canvas canvas{
139 margin-top: 1px;
140 margin-left: 8px;
141 }
142 </style>
这篇文章是我参考别人写的，很感谢那个博主。
登录功能带验证码的例子：https://www.jianshu.com/p/99c6e2f3e457
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