在initialize()
函数内部有一个 jQueryeach
循环。在该循环内部是一个引用,由于 jQuery 已重新分配给当前循环元素,因此该引用this.dbcolumns
显然不起作用。this
那么如何this.dbcolumns
从循环内部引用呢?它可以在循环之外工作。
function datatable() {
this.url = '';
this.htmltable = '';
this.dbtable = '';
this.dbcolumns = new Array();
this.idfield = 'id';
this.pageno = 0;
this.pagesize = 15;
this.totalpages = 0;
this.totalrecords = 0;
this.searchterm = '';
this.initialize = function() {
this.dbtable = $(this.htmltable).attr('data-table');
this.dbcolumns.push(this.idfield);
$(this.htmltable + ' th[data-field]').each(function(i, col){
this.dbcolumns.push( $(col).attr('data-field') ); /* <<<<<<<<<< this line */
});
return this;
}
}