Comparing NSNumbers in Objective C
I assume number1 and number2 are pointers to objects. The < sign is comparing the pointers. You need to compare the actual floatValue or doubleValue if ([number1 doubleValue] < [number2 doubleValue]) ….
nsnumber
How to add two NSNumber objects?
There is not really a better way, but you really should not be doing this if you can avoid it. NSNumber exists as a wrapper to scalar numbers so you can store them in collections and pass them polymorphically with other NSObjects. They are not really used to store numbers in actual math. If you … Read more
Convert NSNumber to int in Objective-C
Have a look at the documentation. Use the intValue method: NSNumber *number = [dict objectForKey:@”integer”]; int intValue = [number intValue];
How to convert NSNumber to NSString
Try: NSString *myString = [NSNumber stringValue];
How to convert an NSString into an NSNumber
Use an NSNumberFormatter: NSNumberFormatter *f = [[NSNumberFormatter alloc] init]; f.numberStyle = NSNumberFormatterDecimalStyle; NSNumber *myNumber = [f numberFromString:@”42″]; If the string is not a valid number, then myNumber will be nil. If it is a valid number, then you now have all of the NSNumber goodness to figure out what kind of number it actually is.