I can't read and write variables from outside the class the made in?

Question

This is the code i used to get two date variables from AppDelegate. But the variables never contain anything they just seem to be blank. My question is am i doing something wrong with the code?

AppDelegate *appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];

NSTimeInterval secondsBetween = [appDelegate->enterForgroundDate timeIntervalSinceDate:appDelegate->enterBackgroundDate];

Can you share how you declare your variables in your AppDelegate — Popeye, May 09 '14 at 08:51

score -2 · Accepted Answer · edited May 23 '17 at 12:05

-2

Define your variables in your AppDelegate.h:

@property (nonatomic, strong) NSDate *enterForgroundDate;
@property (nonatomic, strong) NSDate *enterBackgroundDate;
@property (nonatomic) BOOL testBool;

Then you should be able to do this:

AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSTimeInterval secondsBetween = [appDelegate.enterForgroundDate timeIntervalSinceDate:appDelegate.enterBackgroundDate];
NSLog(@"appDelegate: %i", appDelegate.testBool );

For more information about the dot-notation or arrow-notation see this link

edited May 23 '17 at 12:05

Community

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answered May 09 '14 at 08:38

Roland Keesom

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Ok so I've implemented this in exactly as you have but if i try and access BOOL variable in this way it just seams to set them to NO even if they are YES in the app delegate class. Any ideas? – user3254808 May 09 '14 at 16:47
I've updated my answer to include a BOOL. It should just work in the same way. Let me know if it works for you – Roland Keesom May 10 '14 at 08:55

I can't read and write variables from outside the class the made in?

1 Answers1