uniapp 长按保存图片代码

<template>
    <div>
        <div>
        <img @longtap="saveImg(imgurl)" class="h160" :src="imgurl" />
        </div>
        <div>
        <img @longtap="saveImg(imgurl2)" class="h160"  :src="imgurl2"/>
        </div>
    </div>
</template>

<script>
    export default{
        data(){
            return {
                imgurl:"http://img.deitui.com/?text=老雷PHP全栈开发&w=320&h=160",
                imgurl2:"http://img.deitui.com/?text=长按保存图片&w=320&h=160"
            }
        },
        methods:{
            saveImg:function(url){
                uni.downloadFile({
                    url: url, 
                    success: (res) => {
                        if (res.statusCode === 200) {
                            console.log('下载成功');
                            uni.saveImageToPhotosAlbum({
                            filePath: res.tempFilePath,
                            success: function (rs) {
                                console.log(rs);
                                console.log('save success');
                            }
                        });
                        }
                    }
                });
            } 
        }
    }
</script>

<style>
    .h160{
        height:160px;
    }
</style>