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How could I store a 25+ digit string containing digits i.e. (1234567890123456789012345) as a NSInteger in an imageView.tag and then later convert it back to it’s original string?
The tag of a UIImageView can hold 32 bits, at most, which is less than 10 independent digits.
You could subclass a UIImageView, and add your own tagObject property to it. Then just use your new class and store an arbitrary length NSString in its tagObject.