Ext-设置form表单不可编辑

1.

    var formEach  = win.down('form').items.items;
    Ext.each(formEach,function(item){
        console.log(item);
        //item.setReadOnly(true);
        item.setDisabled(true);
        //item.readOnly = true;
        item.fieldStyle = 'background:#E6E6E6';
    }); 

2.

var form = getWinForm(grid);
form.items.each(function(items) {
         items.items.each(function(item) {
                     console.log(item);
                     //item.setReadOnly(true);
                     item.readOnly = true;
                      item.fieldStyle = 'background:#E6E6E6';
           });
}); 

3.

 win.down('form').setDisabled(true);