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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); });
jQuery loop over JSON字符串 – $.each实例
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原文地址：http://www.cnblogs.com/Web-Architecture/p/5132812.html
