Objective c 如何在我的应用程序中使用此JSON文本？

我有以下JSON文本，如下所示。我想把它整合到我的应用程序中，只需要把它的一部分分配给变量就可以了。很简单，我知道，但我不知道怎么做

[{"id":"1","category":"1","fact":"Worldwide, around 1.2 trillion eggs are produced for eating every year, which means that average person on Earth consumes 173 eggs a year."},{"id":"3","category":"2","fact":"How to tell if you're going to throw up? -Your mouth starts to fill with saliva which is there to protect your mouth and teeth from the stomach acid mixed with the vomit."},{"id":"2","category":"2","fact":"Bone cells are constantly renew so every ten years you have a new skeleton."}] 

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您的文本看起来像一个数组。所以试着这样做：-

NSError *err = nil;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &err];

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如果json文本是NSString，则需要将其转换为NSData，以便：

    NSString* jsonText = @"[{"id":"1","category":"1","fact":"Worldwide, around 1.2 trillion eggs are produced for eating every year, which means that average person on Earth consumes 173 eggs a year."},{"id":"3","category":"2","fact":"How to tell if you're going to throw up? -Your mouth starts to fill with saliva which is there to protect your mouth and teeth from the stomach acid mixed with the vomit."},{"id":"2","category":"2","fact":"Bone cells are constantly renew so every ten years you have a new skeleton."}]";
    NSData* data = [jsonText dataUsingEncoding:NSUTF8StringEncoding];

    NSError* error;
    NSDictionary* jsonDict = [NSJSONSerialization 
    JSONObjectWithData:responseData
    options:kNilOptions 
    error:&error];

现在，您可以像访问字典一样访问元素。

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希望这对您有所帮助。

对NSJSONSerialization进行一些搜索。请注意，如果您在Google中搜索objective-c json，您将得到几十个示例。