I'm attempting to get around a date validation that refuses to take anything earlier than tomorrow. So far I have this: NSDate *dateY = [NSDate dateWithTimeIntervalSinceNow:-86400]; // Negative o...

I've got a dictionary initialized like so... keyDictionary = [[NSDictionary dictionaryWithObjects:values forKeys:keys]retain]; where keys is an NSArray of the alphabet and other characters and v...

I have a few floats which I convert to NSNumbers and add to an array, then sort in numerical order. I then take the original floats and convert those to NSNumbers, but if I try to compare them if(...

I have a parser returning some string value I'd like to use as parameter for my class instance initialisation. I have a method asking two NSString and a float value, but I can't convert the string...

I got an crash logs from a customer to figure why my app crash on her iPhone. Here some info from crash log: Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x00000000, 0x00000000 Crashed T...

Given the following code: int firstInt, secondInt; firstInt = 5; secondInt = 5; NSNumber *firstNumber = [NSNumber numberWithInt:firstInt]; NSNumber *secondNumber = [NSNumber numberWithInt:second...

there is a coordinate object with three variables latitude(NSNumber) ,longitude(NSNumber) and time(NSDate),for checking the program on my simulator,i gave the folowing code [coordinate setLatitude...

So essentially my question is this, I am creating an NSMutableDictionary using uint64_t objects as the key. Is there any better way to create them than doing this? uint64_t bob=7; NSNumber *bobs...

I'm trying to convert an NSString object to an NSNumber with the same numerical value. When I create the NSString object using this statement... NSString *songID = [localNotif.userInfo objectForKe...

I'm new to Objective-C and Cocoa. I've read that NSInteger and NSNumber are preferred when working with simple integers because they're the "platform-safe" versions of the primitive numeric types (...

I want to convert NSString to NSNumber without using numbreFromString: method? The numbreFromString: metgod is acting weirdly in 4.0. So i want to use an alternative to convert NSString to NSNumber...

I'm working on a console app that is tracks different songs. I'm working on getting the song class up off the ground first and have run into a snag trying to log an nsnumber which has been allocate...

I an developing some code in which I use a scanner to get to NSNumbers from a string, say x and y. Now I want to compute something simple from x and y, say, z = 10.0/(x + y/60.0)/60.0). I can't do...

As I understand, in Objective-C you can only put Objects into dictionaries. So if I was to create a dictionary, it would have to have all objects. This means I need to put my ints in as NSNumber, r...

In my core data model, I have an entity with an optional NSNumber attribute. How do I test to see if the value in that attribute is valid or not? When I test for nil... doesn't work. [self numb...

I have an unsigned long long value which I want to store into an NSString and retrieve from the string. Initially I have the value in an NSNumber and I am using this to get the string NSString *n...