一张的情况

<script>
            var btn1 = document.querySelector("#btn1");
            var imgbox = document.querySelector("#imgbox");
            btn1.addEventListener("tap", function() {
                plus.gallery.pick(function(path) {
                    imgbox.src = path; //获得图片路径
                }, function(e) {
                    console.log("取消选择图片");
                }, {
                    filter: "image"
                });
            })
</script>

多张的情况 plus.gallery.pick

<script>
            var btn1 = document.querySelector("#btn1");
            
            btn1.addEventListener("tap", function() {
                plus.gallery.pick(function(e) {
                    var arr = [];
                   for(var i in e.files)
                   {
                    var filePath = e.files[i]; 
                    arr.push(filePath);
                   }
                   console.log(arr);
                   var imgbox = document.getElementsByClassName("imgbox");
                   for(var m=0;m<arr.length;m++)
                   {
                     imgbox[m].src= arr[m];
                   }
                }, function(e) {
                    console.log("取消选择图片");
                }, {
                    filter: "image",
                    multiple:true,
                    maximum:5,
                    onmaxed:function(){
                        plus.nativeUI.alert("最多只能选择5张");
                    }
                });
            })
        </script>