Back button highlight about swipeback

[devxoul]

Hi @panzerdp ,
Thanks for your bug report. I've tested for some cases, then I found that interactiveGestureRecognizer cancels navigation button's touch event. I just add some code that enables navigation button highlighting.

• Patch commit: f1bba03
• New version on CocoaPods: SwipeBack 1.0.2

[panzerdp]

Hi @devxoul,
thanks for your quick answer and fix.
I installed the 1.0.2 version and the custom back button is highlighted, but... the swipe back is not working. What could be the problem?
Tested in iOS 8 simulator, Xcode 6.2 beta, built using Swift.
Thanks.

[devxoul]

I tested in iOS 8 simulator with Xcode 6.1 and works fine. I've just downloaded Xcode 6.2 beta, and gonna test again. While testing, how about check this demo project? It's still in progress but you can test with environment that I developed in. Thanks.

[devxoul]

I found something strange that SwipeBack 1.0.2 installed via CocoaPods doesn't work properly. I removed calling load of super then works fine. I released 1.0.3 version, check for these:

• Patch commit: a5df3ae
• New version on CocoaPods: SwipeBack 1.0.3

Thank you.

[panzerdp]

I installed the 1.0.3 version and it works better.
In my case I have a back button with custom background image only, without text and unfortunately it is not highlighted. When using a simple button with text, it does highlight.
I checked also the demo version, it works well with textual back button, but no example with background image.
Thanks.

[panzerdp]

I searched more in the code and managed to find a solution.
It seems like you highlight the UINavigationButton, as a descendant of the Navigation Bar. But in my particular case, I have a UIButton in navigation button, which catches the gesture. I've added the highlight to UIButton, and it works correct.
I've updated UINavigationController+SwipeBack.m with the following:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    Class UINavigationButton = NSClassFromString(@"UINavigationButton");
    Class UIButtonClass = NSClassFromString(@"UIButton");
    if (([touch.view isKindOfClass:UINavigationButton] || [touch.view isKindOfClass:UIButtonClass]) && [touch.view isDescendantOfView:self.navigationBar]) {
        UIButton *button = (id)touch.view;
        button.highlighted = YES;
    }
    return YES;
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    CGPoint location = [gestureRecognizer locationInView:self.navigationBar];
    UIView *view = [self.navigationBar hitTest:location withEvent:nil];

    Class UINavigationButton = NSClassFromString(@"UINavigationButton");
    Class UIButtonClass = NSClassFromString(@"UIButton");
    if (([view isKindOfClass:UINavigationButton] || [view isKindOfClass:UIButtonClass]) && [view isDescendantOfView:self.navigationBar]) {
        UIButton *button = (id)view;
        button.highlighted = NO;
    }
    return YES;
}

I made some initial tests, it seems to work correct.
Let me know what you think.
Thanks.

[devxoul]

Cool. Since UINavigationButton is a subclass of UIButton, so we can just put this code instead:

if ([view isKindOfClass:[UIButton class]] && [view isDescendantOfView:self.navigationBar]) {
    ...
}

I just released 1.0.4 to CocoaPods.
Thank you for your time @panzerdp :D

[panzerdp]

Agreed, we can use UIButton.
Thanks for your time too. I'm glad to have this working :)