使用camera 组件 开发工具闪退<!-- camera.wxml -->
<camera device-position="back" flash="off" binderror="error" style="width: 100%; height: 300px;"></camera>
<button type="primary" bindtap="takePhoto">拍照</button>
<view>预览</view>
<image mode="widthFix" src="{{src}}"></image>