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iOS Build a Self-Destructing Message iPhone App Capturing Photo and Video Using UIImagePickerController viewDidLoad and the View Controller Lifecycle

Perry Rose
Perry Rose
413 Points

Camera keeps opening when code is placed in (void)viewWillAppear

When I put my code to access the camera/photo album inside - (void)viewWillAppear:(BOOL)animated, the camera/photo album keeps opening after every time I take/select a photo.

When I put the same code back under - (void)viewDidLoad, everything works fine, and doesn't keep opening. But the code can't be inside 'viewDidLoad' as I won't be able to access the camera/photo album twice.

Is anyone else having problems with this?

I have watched the tutorials 4 times now and I know my code is correct. Could this be because I am using a newer version of Xcode?

Cheers, Perry.

1 Answer

Martin Wildfeuer
PLUS
Martin Wildfeuer
Courses Plus Student 11,071 Points

I have not checked the assignment, but this is intended behavior.

- (void)viewWillAppear:(BOOL)animated will be called everytime your view will appear, that is becomes visible as the topmost view controller. When you open the camera, your viewWillDisappear as the camera is added as the topmost view controller. As soon as your done, the camera is removed from the hierarchy and your view controller becomes visible again, thus triggering viewWillAppear.

All code that is intended to only be executed once should not go into viewWillAppear. You can read more on the view lifecycle here.