不支持多次推送视图控制器？

发布于 2024-12-04 04:41:25 字数 858 浏览 2 评论 0原文

每当我尝试像这样切换视图时，我都会收到以下错误：

-(void)changeView1ToView4 {
    [self.navigationController1 pushViewController:view4 animated:YES];
}

当应用程序首次加载且用户直接进入此视图时，不会发生这种情况。仅当我转到其他视图之一，返回主菜单，然后尝试转到此视图时，才会发生此崩溃。

另外，如果您还不确定，我正在使用 UINavigationController。另外，此代码位于应用程序委托中，我从具有父视图的视图控制器调用它，因此我使用 .reference 来调用它，如下所示：

[self.reference changeView1ToView4];

有没有真正的方法可以解决此问题？

谢谢！

编辑1：

[self.navigationController1 pushViewController:view4 animated:NO];
[self.navigationController1 pushViewController:view4 animated:YES];

I tried that and got this crash message in the console:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Pushing the same view controller instance more than once is not supported (<View2: 0x18d540>)'

原文

I am getting the following error whenever I try to switch views like this:

-(void)changeView1ToView4 {
    [self.navigationController1 pushViewController:view4 animated:YES];
}

This doesn't happen when the app first loads and user goes directly to this view. This crash only happens when I go to one of my other views, come back to the main menu, and then try to go to this view.

Also if you weren't sure already, I am using a UINavigationController. Also this code is in the app delegate and I am calling it from a view controller which has a parent view so I am using a .reference to call it like this:

[self.reference changeView1ToView4];

Is there any real way to fix this?

Thanks!

Edit1:

[self.navigationController1 pushViewController:view4 animated:NO];
[self.navigationController1 pushViewController:view4 animated:YES];

I tried that and got this crash message in the console:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Pushing the same view controller instance more than once is not supported (<View2: 0x18d540>)'

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寒冷纷飞旳雪 2024-12-11 04:41:25

当将 2 个视图推入堆栈时，请尝试调用：

[self.navigationController1 pushViewController:view4 animated:YES];

并且

[self.navigationController1 pushViewController://secondviewcontrollername// animated:NO];

如果您尝试将两个视图上的动画：字段设置为 YES 来推入多个视图，那么您会混淆堆栈。一次仅对一个视图进行动画处理。

When pushing 2 views onto the stack, try to call:

[self.navigationController1 pushViewController:view4 animated:YES];

and

[self.navigationController1 pushViewController://secondviewcontrollername// animated:NO];

If you try to push more than one view with the animated: field set to YES on both, then you confuse the stack. Only animate one view at a time.

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半透明的墙 2024-12-11 04:41:25

仅供参考，如果您调用 setViewControllers:animated: ，则无需随后调用 pushViewController: ，否则您将收到“不支持多次推送同一视图控制器实例”崩溃。

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单身狗的梦 2024-12-11 04:41:25

            @try {
               [self.navController pushViewController:viewController animated:NO];
            } @catch (NSException * e) {
                NSLog(@"Exception: %@", e);
                 [self.navigationController popToViewController:viewController animated:NO];
            } @finally {
                //NSLog(@"finally");
            }

            @try {
               [self.navController pushViewController:viewController animated:NO];
            } @catch (NSException * e) {
                NSLog(@"Exception: %@", e);
                 [self.navigationController popToViewController:viewController animated:NO];
            } @finally {
                //NSLog(@"finally");
            }

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陪我终i 2024-12-11 04:41:25

推送前检查此条件

if (![[self.navigationController topViewController] isKindOfClass:[YOURCONTROLLER class]])
    [self.navigationController pushViewController:YOURCONTROLLER animated:YES];

Check this condition before push

if (![[self.navigationController topViewController] isKindOfClass:[YOURCONTROLLER class]])
    [self.navigationController pushViewController:YOURCONTROLLER animated:YES];

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