Question

我使用UINavigationController作为rootviewController和pushingViewController的故事板segue。我的应用程序中有很多viewcontrollers。我只使用推视控制器传递它们。

崩溃情景:(可以重现）

我有一个产品列表viewController，当我使用tap Gesture识别器点击列表中的产品时，我将导航到产品详细信息viewController。
从详细视图控制器中，我将被推送到购物车项目viewController，当我点击名为“添加到购物车”的按钮时，它会显示所有选定的产品。
如果我尝试支付所有产品，我想从人员选择器中选择联系人，当我按下付款按钮时，它会将peopelpickerController显示为modalViewController，当我选择联系人时，它会崩溃。
只有在从产品列表视图controlelr到peoplepicker控制器之间往复移动时才会发生崩溃。当我使用仪器调试时，我遇到了崩溃说取消分配实例接收消息。
我已经包含了我遇到崩溃的方法。但我从未试图从任何控制器调用该方法。

代码...

//choosing contact and people picker delegate
- (IBAction) chooseContacts: (id) sender {
    picker = [
        [ABPeoplePickerNavigationController alloc] init];
    picker.peoplePickerDelegate = self;
    [self presentViewController: picker animated: YES completion: nil];
}

#pragma mark - Addressbook delegate methods

- (void) peoplePickerNavigationControllerDidCancel: (ABPeoplePickerNavigationController * ) peoplePicker {
    [self dismissViewControllerAnimated: YES completion: nil];
}


- (BOOL) peoplePickerNavigationController: (ABPeoplePickerNavigationController * ) peoplePicker
shouldContinueAfterSelectingPerson: (ABRecordRef) person {
    [self dismissViewControllerAnimated: YES completion: ^ {
        [self displayPerson: person];
    }];

    return NO;
}

以下方法在performSegueWithIdentifier行

#pragma mark- Tap gesture delegates

-(void)tapGestureFirstImage:(UITapGestureRecognizer *)sender
{
    UIImageView *image = (UIImageView *)sender.view;
    if (image.tag < [_productsArray count]) {
            [MBProgressHUD showHUDAddedTo:self.view animated:YES];
        productDetailDictionary = [_productsArray objectAtIndex:image.tag];
        NSLog(@"%@",productDetailDictionary);
        [self performSegueWithIdentifier:@"productDetailSeague" sender:sender];
    }
    NSLog(@"imageView.Tag %ld",(long)image.tag);

}

崩溃日志：

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread:  0

Thread 0 Crashed:
0   libsystem_kernel.dylib          0x39cb11fc __pthread_kill + 8
1   libsystem_pthread.dylib         0x39d1aa2e pthread_kill + 54
2   libsystem_c.dylib               0x39c61ff8 abort + 72
3   libc++abi.dylib                 0x38f90cd2 abort_message + 70
4   libc++abi.dylib                 0x38fa96e0 default_terminate_handler() + 248
5   libobjc.A.dylib                 0x396f291e _objc_terminate() + 190
6   libc++abi.dylib                 0x38fa71c4 std::__terminate(void (*)()) + 76
7   libc++abi.dylib                 0x38fa6a18 __cxa_throw + 112
8   libobjc.A.dylib                 0x396f277e objc_exception_throw + 246
9   CoreFoundation                  0x2ef5be88 +[NSException raise:format:] + 100
10  UIKit                           0x317b9590 -[UIViewController _preferredInterfaceOrientationForPresentationInWindow:fromInterfaceOrientation:] + 496
11  UIKit                           0x317b7dce -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:animation:] + 2054
12  UIKit                           0x317b6e20 -[UIViewController presentViewController:withTransition:completion:] + 4664
13  UIKit                           0x31992cae -[UIViewController presentModalViewController:animated:] + 26
14  DHCC Events                     0x0008f0c0 0x38000 + 356544
15  libdispatch.dylib               0x39bd5d18 _dispatch_call_block_and_release + 8
16  libdispatch.dylib               0x39bdbd16 _dispatch_after_timer_callback$VARIANT$mp + 46
17  libdispatch.dylib               0x39bd5d04 _dispatch_client_callout + 20
18  libdispatch.dylib               0x39bde7fe _dispatch_source_invoke$VARIANT$mp + 258
19  libdispatch.dylib               0x39bdc73a _dispatch_main_queue_callback_4CF$VARIANT$mp + 186
20  CoreFoundation                  0x2ef26814 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 4
21  CoreFoundation                  0x2ef250e8 __CFRunLoopRun + 1296
22  CoreFoundation                  0x2ee8fc22 CFRunLoopRunSpecific + 518
23  CoreFoundation                  0x2ee8fa06 CFRunLoopRunInMode + 102
24  GraphicsServices                0x33b8327e GSEventRunModal + 134
25  UIKit                           0x31733044 UIApplicationMain + 1132
26  DHCC Events                     0x00041ad6 0x38000 + 39638
27  libdyld.dylib                   0x39bfaab4 start + 0

感谢您的帮助。

Answer 1

在-(void)tapGestureFirstImage:(UITapGestureRecognizer *)sender

用

执行segue

[self performSegueWithIdentifier:@"productDetailSeague" sender:sender];

但我认为发件人应该是self而不是sender ..

<强>更新

在picker处于活动状态时，您是否尝试执行segue？在这种情况下，self可能会被取消分配，因此您可以在picker被解雇后尝试执行segue：

[picker dismissViewControllerAnimated:YES completion:^{[self performSegueWithIdentifier:@"productDetailSeague" sender:self];}];

iOS崩溃：respondsToSelector：发送到解除分配的实例的消息

1 个答案: