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JSONObjectWithData方法里options參数选择解释

NSJSONReadingMutableContainers 
Specifies that arrays and dictionaries are created as mutable objects.    //  创建可变的数组或字典 接收 
 
NSJSONReadingMutableLeaves 
Specifies that leaf strings in the JSON object graph are created as instances of NSMutableString.   // 指定在JSON对象可变字符串被创建为NSMutableString的实例 
 
NSJSONReadingAllowFragments 

Specifies that the parser should allow top-level objects that are not an instance of NSArray or NSDictionary   //  指定解析器应该同意不属于的NSArray或NSDictionary中的实例顶层对象 


測试的 每一项都用字典接收,系统也没有给我报错。

难道这是给返回的data类型有关,假设返回的是字典或数组。就用第一项 

JSONObjectWithData方法里options參数选择解释