Question

NSDate *today = [[NSDate alloc] init];
    NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *onset = [[NSDateComponents alloc] init];
    [onset setMonth:monthsStart];
    NSDate *fromDate = [gregorian dateByAddingComponents:onset toDate:today options:0];
    [onset setMonth:monthsEnd];
    NSDate *toDate = [gregorian dateByAddingComponents:onset toDate:today options:0];

it says the following :-

1. Method returns an Objective-C object with a +1 retain count
2. Object leaked: object allocated and stored into today is not referenced later in this execution path and has a retain count of +1

Answer 1

The leak is because you are not releasing today. Please use [today release] and release the same. The same is the case with calender and onset. Immediately after the line NSDate *toDate = [gregorian dateByAddingComponents:onset toDate:today options:0];, please release all these params.

NSDate *today = [[NSDate alloc] init];
NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *onset = [[NSDateComponents alloc] init];
[onset setMonth:monthsStart];
NSDate *fromDate = [gregorian dateByAddingComponents:onset toDate:today options:0];
[onset setMonth:monthsEnd];
NSDate *toDate = [gregorian dateByAddingComponents:onset toDate:today options:0];
//After you are done with the below variables, you can release it
[today release];
[calender release];
[onset release]; //you cannot use these variables after this line.

Also please go through this documentation, Advanced Memory Management Programming Guide