How to convert and compare NSNumber to BOOL?

iphone, objective-c

Solution

You currently compare two pointers. Use `NSNumber`s methods instead to actually compare the two:

if([someNSNumberValue isEqualToNumber:[NSNumber numberWithBool:NO]]) {
    // ...
}

To get the bool value from a `NSNumber` use `-(BOOL)boolValue`:

BOOL b = [num boolValue];

With that the comparison would be easier to read for me this way:

if([num boolValue] == NO) {
    // ...
}

Problem

First I convert BOOL value to NSNumber in order to put it into NSUserDefaults. Later I would like to retrieve the BOOL value from the NSUserDefaults, but obviously I get NSNumber instead of BOOL. My questions are? - how to convert back from NSNumber to BOOL? - How to compare NSNumber to BOOL value. Currently I have: ``` if (someNSNumberValue == [NSNumber numberWithBool:NO]) { do something } ``` any better way to to the comparison? Thanks!

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