Question

I am initializing UIButton in init method of a class like this:

UIButton* upButton=[[UIButton alloc] initWithFrame:CGRectMake(2*stepX, 13*stepY,2*stepX,stepY)];
[upButton setTitle:@"UP" forState:UIControlStateNormal];
[upButton setBackgroundColor:[UIColor blueColor]];
[upButton addTarget:self action:@selector(pressedUp) forControlEvents:UIControlEventTouchUpInside];

In pressedUp method I need to use variables from that class (NSInteger* and my class hero*).
So I am doing:

hero*h=self.mainHero;
NSInteger*m=self.map;

But later in code I can easily work with hero class (change position etc) but it fails to work with self.map (awful integers in array instead of 0 and 1)… How to fix it?

Answer 1

From your last comment it appears that the problem is due to a dangling reference: you create a local variable lvl1Map[], assign it to self.map, and exit the initializer. At this point, lvl1Map[] is gone, but the map is pointing to the area in the memory where it once has been.

You can fix this problem by declaring lvl1Map static:

NSInteger lvl1Map[]={...};
[self setMap:lvl1Map];