uni.share分享IOS有问题

var title = "主题";  
var miaoshu = "描述！";  
var imgurl =  ‘’图片路径‘’  
var url = '分享地址'  
uni.share({  
provider: "weixin",  
scene: "WXSceneSession",  
type: 0,  
href: url,  
title: title,  
summary: miaoshu,  
imageUrl: imgurl,  
success: function(res) {  

            }  
   })  

在IOS中分享会报错
{ err:' share: "file"' }
为什么啊 安卓没有问题