Question

(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    


    [self.window addSubview:rootController.view];
    [self.window makeKeyAndVisible];



    [[controlfile alloc]scedule1];   
    return YES;
}

i got potential leak of an object allocated on [[controlfile alloc]scedule1] when i build & analyze

Answer 1

[[controlfile alloc]scedule1];

This is allocating an instance of class controlfile and then calling scedule1 on the allocated object. (Note that it’s not yet initialized; you should have initialized it first by calling init). Then the object (which you allocated) is never referenced again. Thus, you have leaked it.

You really need to do something like this:

id controlfile = [[ControlFile alloc] init];
[controlfile scedule1];
[controlfile release];

This assumes that ControlFile is a class. If it’s an instance variable (as indicated by the all lowercase text and lack of declaration in your code), then you want this:

controlfile = [[WhateverTheDeclaredClassOfControlFileIs alloc] init];
[controlfile scedule1];

// In the -dealloc method, call this:
[controlfile release];

For every call to alloc, you must call either release or autorelease when you are done with the object. You are not doing that here, and thus you have leaked the object.