1、form.wxml
<form bindsubmit="onSubmit"><input class="ipt" placeholder="请输入用户名"focus="true"></input><button form-type="submit">提交</button></form>
2、form.wxss
button {margin: 10rpx 0;border: 1px green solid;}.ipt {/* border:1px rgb(192, 192, 192) solid; */width: 100%;height: 40px;background-color: rgb(235, 235, 233);border-radius: 10px;padding-left: 15px;box-sizing: border-box;}