<input type="button" @click="btn1" class="btn1" title="单屏" />
设置图片作为按钮背景,去掉边框
.btn1 {
border: none;//设置无边框
width: 32px;
height: 32px;
background: url("../../assets/divide_images/one.png") no-repeat center center / 100% 100%;
}