school-market/mini-app/pages/auth/login/login.wxml

<view class="container">
    <view class="form-box">

    	<view class="form-item">
    		<input class="username" value="{{username}}" bindinput="bindUsernameInput" placeholder="账号" auto-focus/>
    		<image wx:if="{{ username.length > 0 }}" id="clear-username" class="clear" src="/static/images/clear_input.png" catchtap="clearInput"></image>
    	</view>

    	<view class="form-item">
    		<input class="password" value="{{password}}" password bindinput="bindPasswordInput" placeholder="密码"/>
    		<image class="clear" id="clear-password" wx:if="{{ password.length > 0 }}" src="/static/images/clear_input.png" catchtap="clearInput"></image>
    	</view>

		<view class="form-item-code" wx-if="{{loginErrorCount >= 3}}">
			<view class="form-item code-item">
				<input class="code" value="{{code}}" bindinput="bindCodeInput" placeholder="验证码"/>
				<image class="clear" id="clear-code" wx:if="{{ code.length > 0 }}" src="/static/images/clear_input.png" catchtap="clearInput"></image>
			</view>
			<image class="code-img" src="https://dl.reg.163.com/cp?pd=yanxuan_web&pkid=SkeBZeG&random=1489903563234"></image>
		</view>

    	<button type="default" class="login-btn" bindtap="startLogin">登录</button>

    	<view class="form-item-text">
    		<navigator url="/pages/auth/register/register" class="register">注册账号</navigator>
			<navigator url="/pages/auth/reset/reset" class="reset">忘记密码</navigator>
    	</view>

    </view>
</view>