CODEWITHSUNDEEP
iosuinavigationcontrollerios7
ConfusedNoob
ConfusedNoob

Reputation: 10186

Intercept back navigation in iOS7

I want to stop somebody going back on my Navigation Controller if they haven't saved their changes. Most posts on SO discuss overriding the back button (with a variety of techniques to do this). However, iOS7 allows you to now swipe to go back in a navigationViewController...

I did see the UINavigationControllerDelegate which looks like the right type of delegate I'd want to implement but I see no way to cancel a navigation action. Any ideas how to do this?

Upvotes: 0

Views: 960

Answers (1)

Tarek Hallak
Tarek Hallak

Reputation: 18470

Unfortunately nothing changed in iOS7, you still need to fake your back button if you want to put some check into it.

By the way it easier now since you don't need to fake the arrow button.

Edit:

to do that:

UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 44.0f, 30.0f)];
[backButton setImage:[UIImage imageNamed:@"back.png"]  forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(popVC) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

Upvotes: 1

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