Crashing when I swipe right and left quickly, Tab index gets off and finally crash.

[aftabnaqvi]

2015-10-30 23:29:33.975 Saba[2335:1157297] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: [views count] == 3'
*** First throw call stack:
(0x182bd0f5c 0x1977c3f80 0x182bd0e2c 0x183abff3c 0x1888faad8 0x1888fe304 0x1888f9de8 0x18812300c 0x187929f14 0x187924b20 0x1879249e0 0x18792407c 0x187923dd0 0x187976b00 0x183e5e018 0x182b728e0 0x182b88cdc 0x182b88414 0x182b8616c 0x182ab4dc0 0x18dc08088 0x18818ef60 0x100066930 0x197fee8b8)
libc++abi.dylib: terminating with uncaught exception of type NSException

Call stack does not give much information to me. I am pasting the call stack here.

Thread 1Queue : com.apple.main-thread (serial)
#0 0x000000019810b1e0 in __pthread_kill ()
#1 0x00000001981d4f0c in pthread_kill ()
#2 0x000000019807eb78 in abort ()
#3 0x0000000196e413f4 in abort_message ()
#4 0x0000000196e5de98 in default_terminate_handler() ()
#5 0x00000001977c4248 in _objc_terminate() ()
#6 0x0000000196e5af44 in std::__terminate(void ()()) ()
#7 0x0000000196e5a85c in __cxa_throw ()
#8 0x00000001977c4094 in objc_exception_throw ()
#9 0x0000000182bd0e2c in +NSException raise:format:arguments:
#10 0x0000000183abff3c in -NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:
#11 0x00000001888faad8 in -_UIQueuingScrollView _replaceViews:updatingContents:adjustContentInsets:animated:
#12 0x00000001888fe304 in -_UIQueuingScrollView _didScrollWithAnimation:force:
#13 0x00000001888f9de8 in -_UIQueuingScrollView layoutSubviews
#14 0x000000018812300c in -UIView(CALayerDelegate) layoutSublayersOfLayer:
#15 0x0000000187929f14 in -CALayer layoutSublayers
#16 0x0000000187924b20 in CA::Layer::layout_if_needed(CA::Transaction) ()
#17 0x00000001879249e0 in CA::Layer::layout_and_display_if_needed(CA::Transaction*) ()
#18 0x000000018792407c in CA::Context::commit_transaction(CA::Transaction*) ()
#19 0x0000000187923dd0 in CA::Transaction::commit() ()
#20 0x0000000187976b00 in CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) ()
#21 0x0000000183e5e018 in IODispatchCalloutFromCFMessage ()
#22 0x0000000182b728e0 in __CFMachPortPerform ()
#23 0x0000000182b88cdc in CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION ()
#24 0x0000000182b88414 in __CFRunLoopDoSource1 ()
#25 0x0000000182b8616c in __CFRunLoopRun ()
#26 0x0000000182ab4dc0 in CFRunLoopRunSpecific ()
#27 0x000000018dc08088 in GSEventRunModal ()
#28 0x000000018818ef60 in UIApplicationMain ()
#29 0x0000000100066930 in main at /Users/snaqvi/Github/SabaApp/SabaApp/main.m:14
#30 0x0000000197fee8b8 in start ()

[shinoys222]

I am also getting the same crash. Any fixes found ?

[aftabnaqvi]

nope, didn't find any fix.

[ycastonguay-cbc]

Same here. This makes this component unusable unfortunately.

[brianinator]

How many tabs are you guys using?

[aftabnaqvi]

I am using 4 to 7 tabs in different situations.

[brianinator]

Can you post configuration code?

[ycastonguay-cbc]

I'm using 3 to 4 tabs. It's really easy to reproduce the issue, just spawn UIViewControllers with labels indicating the current tab index and scroll quickly from a tab to another. The tab button scrollview works pretty well but if you use swipe gestures to swap from a tab to another before a tab has finished scrolling it will be easy to reproduce the issue.

[aftabnaqvi]

@interface HostViewController ()<ViewPagerDataSource, ViewPagerDelegate>

• (void)viewDidLoad {
  [super viewDidLoad];

  self.dataSource = self;
  self.delegate = self;
  self.arrayDays = [[DBManager sharedInstance] getUniqueDays];

  self.isTodayAvailable = [self isTodayAvailableInSchedule];
  [self setupNavigationBar];
  [self loadContent];

  [[SabaClient sharedInstance] showSpinner:YES];
  [self getWeeklyPrograms];

  //Create the Event Store
  self.eventStore = [[EKEventStore alloc]init];
  }

• (NSUInteger)numberOfTabsForViewPager:(ViewPagerController *)viewPager {
  return self.numberOfTabs;
  }

• (UIView *)viewPager:(ViewPagerController *)viewPager viewForTabAtIndex:(NSUInteger)index {

  UILabel *label = [UILabel new];
  label.backgroundColor = [UIColor clearColor];

  label.font = [UIFont boldSystemFontOfSize:16.0];
  label.text = [self.arrayDays objectAtIndex:index];
  label.textAlignment = NSTextAlignmentCenter;
  label.textColor = [UIColor whiteColor];
  [label sizeToFit];

  return label;
  }

• (UIViewController *)viewPager:(ViewPagerController *)viewPager contentViewControllerForTabAtIndex:(NSUInteger)index {
  DailyProgramViewController *dailyProgramVC = [[DailyProgramViewController alloc] init];
  dailyProgramVC.day = [self.arrayDays objectAtIndex:index];
  return dailyProgramVC;
  }

Here is the link of full source code...
https://github.com/aftabnaqvi/SabaApp/blob/Saba-iOS-1.2/SabaApp/HostViewController.m

I pushed the app with this code but I see crash reports but few.
You can try downloading the app from this URL.
https://itunes.apple.com/us/app/saba-islamic-center-shia-association/id1000687778?mt=8

Thanks for looking into it.

[developweb10]

I am also getting same issue when i swipe fast left to right then getting memory issue.
Message from debugger: Terminated due to memory issue

[developweb10]

Any one can help me to solve this issue otherwise i need to replace this library from app.

[lucoceano]

@developweb10 sorry man, but I do not support this library any more. You look at Pager (swift version) is a bit more reliable.

[developweb10]

@lucoceano You have any other solution for this?

[lucoceano]

@developweb10 if you're into swift, I've done this https://github.com/lucoceano/Pager, you check it out if fits your needs