why iphone crashes on direct field (not by getters/setters) acces

[sorry for my weak english]

If I create some NSArray of strings (as a member field of an object - no property no synthesize),

and initialise it in -viewdidLoad with some strings by

names = [NSArray arrayWithObjects: @"jeden", @"dwa", @"trzy", nil];

and immediately (also in -viewDidLoad) will use it, it is okay.

But when I try use it and its data a little later, in button event handler, it shows that that array data is corrupted (crashes even on [names count];)

It shows that i need to add property and synthesize and use it by self.names and then it seem to work... but it is confusing and sad for me because I do not know what is the reason thet first way of using the member (no self开发者_JAVA百科. no property and synthesize) do not work

could anyone explain,

TIA, fir

names = [NSArray arrayWithObjects: @"jeden", @"dwa", @"trzy", nil]; 

makes an autorelease reference to the object, you need either (both of them increment the retain count by 1):

• make a retain of the object, i mean:

  names = [[NSArray arrayWithObjects: @"jeden", @"dwa", @"trzy", nil] retain];

• or use a new allocation of them, i prefer this approach:

  names = [[NSArray alloc] initWithObjects: @"jeden", @"dwa", @"trzy", nil];

Then in dealloc section don't forget to release it, in order to avoid a memory leak.

Cheers!

You should initialize it properly to have it correctly retained:

names = [[NSArray alloc] initWithObjects:@"jeden", @"dwa", @"trzy", nil];