How to increment a NSNumber

Question

How do I increment a NSNumber?

i.e. myNSNumber++

Answer 1

NSNumbers are immutable, you have to create a new instance.

// Work with 64 bit to support very large values
myNSNumber = [NSNumber numberWithLongLong:[myNSNumber longLongValue] + 1];

// EDIT: With modern syntax:
myNSNumber = @([myNSNumber longLongValue] + 1);