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[Java教程]jQuery loop over JSON字符串 – $.each实例


 

先来一段简单的javascript对象的遍历:

var json = [	{"id":"1","tagName":"apple"},	{"id":"2","tagName":"orange"},	{"id":"3","tagName":"banana"},	{"id":"4","tagName":"watermelon"},	{"id":"5","tagName":"pineapple"}];$.each(json, function(idx, obj) {	alert(obj.tagName);});

当为JSON字符串时:
var json = '[{"id":"1","tagName":"apple"},{"id":"2","tagName":"orange"},{"id":"3","tagName":"banana"},{"id":"4","tagName":"watermelon"},{"id":"5","tagName":"pineapple"}]';	$.each(json, function(idx, obj) {	alert(obj.tagName);});
在Chrome中,他会显示 错误:
Uncaught TypeError: Cannot use 'in' operator to search for '156' in [{"id":"1","tagName":"apple"}...

解决方案:
var json = '[{"id":"1","tagName":"apple"},{"id":"2","tagName":"orange"},{"id":"3","tagName":"banana"},{"id":"4","tagName":"watermelon"},{"id":"5","tagName":"pineapple"}]';	$.each(JSON.parse(json), function(idx, obj) {	alert(obj.tagName);});//or $.each($.parseJSON(json), function(idx, obj) {	alert(obj.tagName);});