Objective-C Default Argument Value

Question

Hey there, quick question here. I\'m sure there\'s a simple answer.

Coming from PHP, I\'m used to declaring a function with a default argument value like this:

Answer 1

You can easily achieve the same effect using #define.

The function in your header file:

+(NSDate*)getDateFromYear:(NSUInteger)year month:(NSUInteger)month day:(NSUInteger)day;

Add a #define for parameter function in header file:

#define GetDateFromYearOnly(year) [YourClassName getDateFromYear:year month:1 day:1]

Then your can use the function like:

NSDate* 2015Date = GetDateFromYearOnly(2015);

And you will get an NSDate object with date 2015/01/01.

If the function is not static, build a new function like this:

-(NSDate*)GetDateFromYearOnly:(NSUInteger)year;

And call:

[self getDateFromYear:year month:1 day:1]