附件上传（进度条加载完成即代表图片上传成功，图片仅可上传一次）
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{"height":"0","width":"0","background-color":"rgb(255, 255, 255)","background-image":"none","background-position":"0 0","background-repeat":"no-repeat","background-gradient-top":"none","background-gradient-bottom":"none","background-scroll":"none","background-size":"auto","themeColorName":"","margin-top":"1","margin-left":"0","margin-right":"0","margin-bottom":"0"}
