iOS开发 StoryBoard使用FDFullscreenPopGesture

在使用纯代码时：
隐藏 NavigationBar 的界面
navigationController.fd_fullscreenPopGestureRecognizer.enabled = NO;
viewController.fd_interactivePopDisabled = YES;
使用 SB 时：
隐藏 NavigationBar

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fd_prefersNavigationBarHidden
fd_interactivePopMaxAllowedInitialDistanceToLeftEdge

使用ScrollView，在 .m 代码里加入

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    if (self.contentOffset.x <= 0) {
        if ([otherGestureRecognizer.delegate isKindOfClass:NSClassFromString(@"_FDFullscreenPopGestureRecognizerDelegate")]) {
            return YES;
        }
    }
    return NO;
}