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Editorial Team
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Asked: 2026-06-07T10:34:10+00:00

For iOS, given some NSDictionary key/value pairs where strings values were added as NSString

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For iOS, given some NSDictionary key/value pairs where strings values were added as NSString and int/float values were added as NSNumber, is there a way to test the data type of a value to see whether it is NSString or NSNumber?

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1 Answer

  1. Editorial Team

    NSObject offers:

    - (BOOL)isKindOfClass:(Class)aClass

    if obj is the value you get out of the NSDictionary then checkout:

    [obj isKindOfClass:[NSString class]]
[obj isKindOfClass:[NSNumber class]]

    If you check for these and you don’t expect anything but NSString or NSNumber in the dictionary, then I would add an NSAssert in the else block.

    There’s more comments here on nuances of NSString and NSCFString:

    In Objective-C, how do I test the object type?

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