UINavigationController从右边缘也可滑动返回

(代码为上一篇文章一部分)

static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        UIGestureRecognizer *gesture =self.navigationController.interactivePopGestureRecognizer;

        gesture.enabled =NO;

        

        UIView *gestureView = gesture.view;

        

        NSMutableArray *_targets = [gesturevalueForKey:@"_targets"];

        id gestureRecognizerTarget = [_targetsfirstObject];

        id navigationInteractiveTransition = [gestureRecognizerTargetvalueForKey:@"_target"];

        SEL handleTransition =NSSelectorFromString(@"handleNavigationTransition:");

        

        UIPanGestureRecognizer *popRecognizer = [[UIPanGestureRecognizeralloc]initWithTarget:navigationInteractiveTransitionaction:handleTransition];

        [gestureView addGestureRecognizer:popRecognizer];

    });