使用jQuery插件qtip遇到的位置问题

$("#myQtip").qtip({id: 'testTip',content: {text:' ',title: {text: "信息",button:true}},position: {target: 'event', effect: true,container : $(self.el),at: 'top left',my: "left center",viewport: $(window),method: 'shift none',adjust: {x: 250}},show: {event: 'click',target: elems},events: {        render: function(event, api) {},show: function(event, api) {}}});