Must remove from container's subviews when reparenting

[Artmobile]

I spent several hours trying to understand why a view that was created using your class crashed my application when I called removeFromSuperview on it. Turned out that you do not detach elements from the container when reparenting. To fix, just call [view removeFromSuperview ]; before reparenting.

- (void) loadContentsFromNibNamed:(NSString*)nibName
{
 ...
    // reparent the subviews from the nib file
    for (UIView * view in containerView.subviews){

        // Without this line,  will crash if you attempt calling removeFromSuperview
        [view removeFromSuperview ];

        [self addSubview:view];
    }
}

[n-b]

This is quite surprising, I'm pretty sure addSubview effectively removes any link to the previous parent. Are you sure it's not a weird retain/release issue?

[specialunderwear]

I can confirm this is true

[Artmobile]

Pretty sure it's not. We are using ARC
On Jun 9, 2013 4:54 PM, "Nicolas Bouilleaud" [email protected]
wrote:

This is quite surprising, I'm pretty sure addSubview effectively removes
any link to the previous parent. Are you sure it's not a weird
retain/release issue?

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[n-b]

@specialunderwear I've reread your original message and I'm even more puzzled. When does the crash happen exactly?

If I understand correctly, the scenario is:

1. Load a view contents via NibLoading
2. Later, send - removeFromSuperview to this view.

You see a crash at 2., is this it? Can you try to isolate the crash on a minimal test project?

[Artmobile]

Sorry, closed by mistake

[Artmobile]

I realize that addSubView should move the view from one parent to another. Still, it either did not happen or something else went on. @specialunderwear - are still experiencing the same problem?

[specialunderwear]

Yes, I fixed it in my fork. Crashes everytime ...

On 21 sep. 2013, at 07:22, IA [email protected] wrote:

I realize that addSubView should move the view from one parent to another. Still, it either did not happen or something else went on. @specialunderwear - are still experiencing the same problem?

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[krusek]

I have the same issue (iOS 6 only) and the same fix works.

[gslomin]

I just had to fix this issue myself and was about to send a pull request. Definitely confirmed in iOS6. Works fine in 7 and 8