onShareAppMessage: function() 自定义图片无法自适应？

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onShareAppMessage: function() 自定义图片无法自适应？onShareAppMessage: function() The custom picture cannot be adaptive?

    onShareAppMessage: function() {        return {            title: this.data.homeLetterName,            path: ``,            imageUrl: this.data.homeLetterImg,            success: function(shareTickets) {                console.info(shareTickets + '成功');                // 转发成功            },            fail: function(res) {                console.log(res + '失败');                // 转发失败            },            complete: function(res) {                // 不管成功失败都会执行            }        }    }

Onshareappmessage: function() custom picture cannot be adaptive? The picture should look like this, but after sharing, it becomes not adaptive. What should I do?     onShareAppMessage: function() {        return {            title:  this.data.homeLetterName ,            path: ``,            imageUrl:  this.data.homeLetterImg ,            success: function(shareTickets) {                 console.info (sharetickets + 'success'); / / forwarding succeeded}, fail: function (RES) { console.log (RES + 'failed'); / / forwarding failed}, Complete: function (RES) {/ / execute regardless of success or failure}

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