CODEWITHSUNDEEP
objective-cmemory-leaks
user401383
user401383

Reputation: 401

memory release with alloc

NSDateComponents *components = [cal components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit ) fromDate:[[NSDate alloc] init]];

when i use [components release];

it crashes my application, how do i release components

when i run with leak instrument - my application crashes when it reaches usage of overall alloc 22MB

Upvotes: 0

Views: 152

Answers (2)

BoltClock
BoltClock

Reputation: 723598

You must not release components yourself at all as it's set to autorelease by the NSCalendar object.

I suspect your leak is coming from your NSDate object that you pass to that line of code. You should probably assign that to a local variable, pass it to the [cal components] method then release the local variable:

NSDate *today = [[NSDate alloc] init];
NSDateComponents *components = [cal components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
                                      fromDate:today];
[today release];

Or, set the NSDate object itself to autorelease as you pass it as you are doing, use [NSDate date], which as David Gelhar commented will generate an autoreleased object, like so:

NSDateComponents *components = [cal components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
                                      fromDate:[NSDate date]];

Upvotes: 3

David Gelhar
David Gelhar

Reputation: 27900

The NSCalendar method components:fromDate: returns an autoreleased object; you must not call release on it yourself (unless you have first called retain).

Check out the Memory Management Rules

Upvotes: 2

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