柱状图不报错，但不显示数据?报错

@Kener-林峰 你好，想跟你请教个问题：

是script引入的，这是ajax的代码

 function getData()
        {
            var arr = new Array();
            $.ajax({
                type:"get",
                url:"http://localhost:9090/height/getHeightData.json",
                dataType:"json",
                success:function(json){
                    for(var i in json)
                    {
                        arr[i] = json[i].height;
                    }
                },
                error:function(){
                    alert("error");
                }
            });
            return arr;
        }

下面这样调用的

 series : [
                            {
                                name: '身高',
                                type: 'bar',
                                data:getData()
                            }
                        ]
                    };
                    myChart.setOption(option);

调试的时候option中有值