iOS Push Segue (programmatically) sometimes stuck but won't crash

Question

When I called:

[self.navigationController pushViewController:SOME_VIEW_CONTROLLER animated:YES];

the app randomly stuck (it didn't crash, so no error log). Have tried debugging it with no result.

Note that:

I called this pushViewController from a UIViewController category. Is there any problem with that?
I am not using storyboard
The problem persist randomly (it doesn't happen all the time)
When it stuck, viewDidAppear won't be called (viewWillAppear, viewWillLayoutSubviews, viewDidLayoutSubviews still called)
the problem never occured when I use animated:NO

Some code snippets:

- (void)routeToBookingDetailsForCustomer:(BookingModel *)booking {
    VTBookingDetailsForCustomerViewController *vc = [VTBookingDetailsForCustomerViewController new];
    vc.booking = booking;
    [self.navigationController pushViewController:vc animated:YES];
}

Just found another thread with similar case: pushViewController stuck or viewdidappear fail

[self.navigationController pushViewController:"view?" animated:YES]; you have written it in your code right? — Bista, Mar 18 '15 at 04:26
Where is VTBookingDetailsForCustomerViewController's view made? Do you have a xib file, or are you making its view in code? — rdelmar, Mar 18 '15 at 06:31
You should post that code. There's nothing in the code you posted that's helpful in answering your question. — rdelmar, Mar 18 '15 at 06:36
Could be the same issue as described here: https://stackoverflow.com/questions/36503224/ios-app-freezes-on-pushviewcontroller — lenooh, Oct 24 '18 at 19:50

score 2 · Answer 1 · answered Mar 18 '15 at 05:02

2

I think you have to pass Nib name as well like this

- (void)routeToBookingDetailsForCustomer:(BookingModel *)booking{
    VTBookingDetailsForCustomerViewController *vc = [[VTBookingDetailsForCustomerViewController alloc]initWithNibName:@"VTBookingDetailsForCustomerViewController" bundle:nil];
    vc.booking = booking;
    [self.navigationController pushViewController:vc animated:YES];
}

Nib name means your XIB name whatever XIB name for your VTBookingDetailsForCustomerViewController, you have to pass this in initWithNibName:@"yourXIBname"

answered Mar 18 '15 at 05:02

Dipen Chudasama

3,063
21
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I don't get it, why should I initialized it with storyboard/nib? – Aruna Harsa Mar 18 '15 at 05:24
Without XIB where controller pushed ? – Dipen Chudasama Mar 18 '15 at 05:50
without XIB what will display in your screen..? this need to some view(XIB) do display your design.... – Dipen Chudasama Mar 18 '15 at 05:51
I changed my code to what you suggested, but it doesnt solve the problem. Moreover, as i mentioned, the problem is 'randomly occured'. If the problem is truly because there's no xib loaded, why would the view appear when the problem doesnt occur – Aruna Harsa Mar 18 '15 at 06:16
Must be some issue in your VTBookingDetailsForCustomerViewController . Show code of viewdidload, viewdidappear.Dont comment on both threads. I'll follow this thread. :) – Bista Mar 18 '15 at 06:21

Bista · Answer 2 · 2015-03-18T05:32:47.573

0

Have you tried this approach?

someViewController *someVC = [someViewController alloc] initWithNibName:@"someViewController " bundle:NULL];
someVC.someVariable  = someValue;
[self.navigationController pushViewController:someVC animated:YES];

Edit : Just saw 'Dipen Chudasama' already answered!

edited Mar 18 '15 at 05:32

answered Mar 18 '15 at 05:09

Bista

7,869
3
27
55

I don't get it, why should I initialized it with storyboard/nib? – Aruna Harsa Mar 18 '15 at 05:23
Because, we have to tell the `pushViewController` that into which viewController it is going to. XIB(new name) and NIB(old name) names are same. So, we initialize class `someViewController ` and nib/xib 'someViewController' together. Because, we have to tell the `pushViewController` that into which viewController it is going to. XIB(new name) and NIB(old name) names are same. So, we initialize class `someViewController ` and nib/xib 'someViewController' together. [Refer](http://stackoverflow.com/questions/15633940/when-and-why-to-use-initwithnibnamebundle-in-development) – Bista Mar 18 '15 at 05:36
I changed my code to what you suggested, but it doesnt solve the problem. Moreover, as i mentioned, the problem is 'randomly occured'. If the problem is truly because there's no xib loaded, why would the view appear when the problem doesnt occur – Aruna Harsa Mar 18 '15 at 06:17
Must be some issue in your VTBookingDetailsForCustomerViewController . Show code of viewdidload, viewdidappear. – Bista Mar 18 '15 at 06:24
I don't think so, because I've removed all codes in viewdidload/viewdidappear. update: the problem is solved when I use animated:NO there's something wrong with the animation is it? – Aruna Harsa Mar 18 '15 at 06:31
[check this](http://stackoverflow.com/questions/21310611/ios7-navigationcontroller-pushviewcontroller-animated-bug) – Bista Mar 18 '15 at 06:39

score 0 · Answer 3 · answered Dec 01 '15 at 01:22

Are you using custom transition animations by implementing UINavigationProtocolDelegate combined with UIViewControllerInteractiveTransitioning?

I struggled with this issue in my own application and it turned out that I was incorrectly starting an interactive transition which I never finished. In this case all debugging showed me that the controller was pushed but UI was not updated until my app changed states.

score 0 · Answer 4 · answered Dec 01 '15 at 11:48

Please try pushViewController code in main queue.

dispatch_async (dispatch_get_main_queue(), ^{

VTBookingDetailsForCustomerViewController *vc = [VTBookingDetailsForCustomerViewController new];
vc.booking = booking;
[self.navigationController pushViewController:vc animated:YES];

});

iOS Push Segue (programmatically) sometimes stuck but won't crash

4 Answers4