JQuery中实现Ajax与服务器通过json交互数据

1.JQuery中的简单的使用ajax。

$.ajax({ //一个Ajax过程 
	type: "post", //以post方式与后台沟通 
	url : "get_location_by_id", //与此页面沟通 
	data: 'device_id=' + this.nextSibling.id, 
	beforeSend: function(){
		var win = $.messager.progress({
                title:'Please waiting',
                msg:'Loading data...'
            });
	},
	complete: function(){
		//AJAX请求完成时隐藏loading提示
		$(document).ready(function(){$.messager.progress('close');});
	},
	success : function(msg) {
		//更新数据
		if (msg != "") {
			var total = eval(msg);
			if(total.length == 0){
				change_map_default();
				$.messager.show({
	                title:'友情提示：',
	                msg:'不好意思，你的这个设备还没有地理位置的记录。',
	                timeout:5000,
	                showType:'slide'
	            });
			}
			for ( var index = 0; index < total.length; index++) {
				if (index == 0) {
					change_map(total[index].longitude, total[index].latitude);
				} else {
					addPolyline(total[index - 1].longitude, total[index - 1].latitude,
							total[index].longitude, total[index].latitude);
				}
				var myCompOverlay = new ComplexCustomOverlay(
						new BMap.Point(total[index].longitude, total[index].latitude),
						total[index].time, "地点为：（" + total[index].longitude + "，" + total[index].latitude + "）");
				mp.addOverlay(myCompOverlay);
				add_marker(total[index].longitude, total[index].latitude);
			}
		}
	}
});

2.各种浏览器对childNodes的解析不同，要特别注意。

3.百度地图api使用，在自己网页中添加百度地图。

function change_map(longitude, latitude) {
	var mp = new BMap.Map("container");
	var point = new BMap.Point(longitude, latitude);
	mp.centerAndZoom(point, 15);
	mp.enableScrollWheelZoom();
	mp.enableKeyboard();
	mp.enableContinuousZoom();
	mp.enableInertialDragging();
	mp.addControl(new BMap.NavigationControl());
	mp.addControl(new BMap.ScaleControl());
	mp.addControl(new BMap.OverviewMapControl());
	window.mp = mp;
}

 4.百度地图添加折线。

//向地图中添加线函数
function addPolyline(from_longitude, from_latitude , to_longitude, to_latitude) {
	var line = new BMap.Polyline( [ new BMap.Point(from_longitude, from_latitude),
			new BMap.Point(to_longitude, to_latitude) ], {
		strokeStyle : "dashed",
		strokeWeight : 2,
		strokeColor : "blue",
		strokeOpacity : 0.6
	});
	mp.addOverlay(line);
}

 5.添加标注信息。

ComplexCustomOverlay.prototype = new BMap.Overlay();
ComplexCustomOverlay.prototype.initialize = function(map) {
	this._map = map;
	var div = this._div = document.createElement("div");
	div.style.position = "absolute";
	div.style.zIndex = BMap.Overlay.getZIndex(this._point.lat);
	div.style.backgroundColor = "#EE5D5B";
	div.style.border = "1px solid #BC3B3A";
	div.style.color = "white";
	div.style.height = "18px";
	div.style.padding = "2px";
	div.style.lineHeight = "18px";
	div.style.whiteSpace = "nowrap";
	div.style.MozUserSelect = "none";
	div.style.fontSize = "12px"
	var span = this._span = document.createElement("span");
	div.appendChild(span);
	span.appendChild(document.createTextNode(this._text));
	var that = this;

	var arrow = this._arrow = document.createElement("div");
	arrow.style.background = "url(http://map.baidu.com/fwmap/upload/r/map/fwmap/static/house/images/label.png) no-repeat";
	arrow.style.position = "absolute";
	arrow.style.width = "11px";
	arrow.style.height = "10px";
	arrow.style.top = "22px";
	arrow.style.left = "10px";
	arrow.style.overflow = "hidden";
	div.appendChild(arrow);
	
	div.onmouseover = function() {
		this.style.backgroundColor = "#6BADCA";
		this.style.borderColor = "#0000ff";
		this.getElementsByTagName("span")[0].innerHTML = that._overText;
		arrow.style.backgroundPosition = "0px -20px";
	};
	
	div.onmouseout = function() {
		this.style.backgroundColor = "#EE5D5B";
		this.style.borderColor = "#BC3B3A";
		this.getElementsByTagName("span")[0].innerHTML = that._text;
		arrow.style.backgroundPosition = "0px 0px";
	};
	
	mp.getPanes().labelPane.appendChild(div);
	return div;
};
ComplexCustomOverlay.prototype.draw = function() {
	var map = this._map;
	var pixel = map.pointToOverlayPixel(this._point);
	this._div.style.left = pixel.x - parseInt(this._arrow.style.left) + "px";
	this._div.style.top = pixel.y - 30 + "px";
};

 

评论

2 楼 txlong_onz 2014-02-27  

夜神月 写道

你好，我看你在beforeSend方法里获取里进度条对象win,但之后没有用，为什么呢？
$.messager.progress是全局单例的吗？比如说我一下开两个进度条，之后关闭。目前我测试是两个一起关。有办法在两个窗口开启两个进度条，分别不同控制关闭吗？

应该是单例的，后边通过$.messager.progress('close');关闭。两个窗口我没有做过，没法回复。

1 楼 夜神月 2014-02-09  

你好，我看你在beforeSend方法里获取里进度条对象win,但之后没有用，为什么呢？
$.messager.progress是全局单例的吗？比如说我一下开两个进度条，之后关闭。目前我测试是两个一起关。有办法在两个窗口开启两个进度条，分别不同控制关闭吗？