data定义imgcodeUrl

	// 获取图片验证码
			getCodeImg() {
				// this.time=1234567;
				this.time = Date.parse(new Date());
				console.log("时间戳");
				console.log(this.time);
				this.axios.get(conf.api_base_url + "/validateCode/create/" + this.time, {
						responseType: "arraybuffer"
					})
					.then(response => {
						return 'data:image/png;base64,' + btoa(new Uint8Array(response.data).reduce((data,
							byte) => data + String.fromCharCode(byte), ''));
					}).then(res => {
						this.imgcodeUrl = res;
					})
			},

使用

	<img :src="imgCodeUrl" alt="图形验证码">