jquery select2 4.0版本中，ajax请求数据没法选中

须要在processResults处理新增Id处理

 

var results = [];
                    $.each(data.items, function (i, v) {
                        var o = {};
                        o.id = v.itemId;
                        o.name = v.itemName;
                        o.value = v.itemId;
                        results.push(o);
                    })
                    return {
                        results: results
                    };