highcharts注意事项

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);

});

上面的代码片断工作正常，提示 “apple”, “orange” … 等，如预期一样。

问题: JSON 字符串

下面的例子中，声明了一个JSON字符串（随附单或双引号）直接地。

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，它显示在控制台下面的错误：

Uncaught TypeError: Cannot use 'in' operator to search for '156'
in [{"id":"1","tagName":"apple"}...

解决方案：JSON字符串转换为JavaScript对象。
要修复它，通过标准JSON.parse()或jQuery 的 $.parseJSON 将其转换为JavaScript对象。

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);

});

转自:http://www.jb51.net/article/54570.htm

巴特西

highcharts注意事项

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