UIImagePickerController EXC_BAD_ACCESS Error

问题

I set up my app to run like this:

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

    self.window = [[UIWindow alloc] initWithFrame:
                         [[UIScreen mainScreen] bounds]];

    UIImagePickerController* picker = [[UIImagePickerController alloc] init];

    self.viewController = picker;
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

After Image picker appears, I choose, for example, "Camera Roll". After that I press the back button (titled "Photos"). App crashes giving EXC_BAD_ACCESS error. When I enable zombie objects I receive "EXC_ARM_BREAKPOINT (subcode = 0xdefe)" error with following logs. Either:

[UIView willRemoveSubview:]: message sent to deallocated instance 0x2088ea20

or if I proceed with image selection:

-[PLImageScrollView willRemoveSubview:]: message sent to deallocated instance 0x1d82c910

On the other hand if I create a new project and put only stated code inside AppDelegate, code works as it should - no errors.

Now, I'm starting a new project and I will copy stuff from my previous project in order to find out what is the problem. If anyone has ideas why these errors occur, please share your thoughts.

回答1:

I found what was the problem. AppDelegate indirectly imported my own custom UIView category in which I (for unknown reasons) implemented dealloc method.

All views practically could not get deallocated properly. I deleted that dealloc method from that category and everything was allright.

回答2:

try declaring UIImagePickerController* picker in AppDelegate.h as class level variable. picker is getting deallocated after - (BOOL)application:(UIApplication *)application finishes.

来源：https://stackoverflow.com/questions/17365423/uiimagepickercontroller-exc-bad-access-error

标签

ios

uiimagepickercontroller

exc-bad-access