I\'ve got a series of buttons that each use a different image. Can I reuse a retained variable like this below:
I init a navigation controller with: UINavigationController *navController = [[UINavigationControlle开发者_StackOverflow中文版r alloc] initWithRootViewController:firstViewController];
NSMutableArray count is returning zero after adding objects to it, its been an hour of hacking away trying to figure out why, and I\'m still stuck, so that brings me here.
Let\'s say I do the following (foo starts out as some object): [foo release]; // STUFF with foo [foo retain];
I have a tableView:didSelectRowAtIndexPath: where I create a ViewController-Instance each time an item is selected. Sometimes it works fine for a long time, sometimes it crashes with a EXC_BAD_ACCESS
i usually dont check the retain count untill the program leaks. But today开发者_JS百科 (i donno y) i checked the retain count and now i am confused.
Given the following code @interface MyClass { SomeObject* o; } @property (nonatomic, retain) SomeObject* o;
I\'ve seen a few posts on here about the issue of using retain or copy for strings. I still can\'t quite get my head around the difference or the importance.
Is there a way to retain values of textfield/textbox when a user submits a form? i only want to retain values with errors or values I specify.
How would I code my android app to remember the values entered by the user between uses? As an example, say I have an EditText \"input1\" and a spinne开发者_如何学Pythonr \"input2\" which give result