EXT JS 4 grid动态隐藏列

EXT JS 4 grid动态隐藏列，废话不多说直接上代码

grid中的column中增加属性 renderer ： hiddenColumn

{header: "签到（班段２）", width:85, sortable: false,id:'field9051042Id',dataIndex: 'field9051042',renderer :hiddenColumn},{header: "签退（班段２）",width:85, sortable: false,id:'field9051043Id',dataIndex: 'field9051043',renderer :hiddenColumn},

根据列中的值来判断该列是否显示

function  hiddenColumn(value, cls, rec, rowIndex, cellIndex) {     var returnValue = value;     var columns = grid.columns;      if(value.indexOf("none") != -1){         returnValue = value.replace("none","");         columns[cellIndex].hidden = true;        }else{            returnValue = value.replace("have","");         column[cellIndex].hidden = false;} return returnValue; }