BasicNavigationViewController:UINavigationViwController

/*

隐藏导航底部线条

*/

-(void)viewDidLoad
{
    [super viewDidLoad];
    self.interactivePopGestureRecognizer.enabled = YES;
    
    /**
     *  隐藏导航底部的线条
     */
    [self findHairlineFromView:self.navigationBar];
}

- (UIImageView *)findHairlineFromView:(UIView *)view
{
    if ([view isKindOfClass:[UIImageView class]] && view.frame.size.height <= 1.0) {
        return (UIImageView *)view;
    }
    
    for (UIView *subView in view.subviews) {
        UIImageView *imageView = [self findHairlineFromView:subView];
        imageView.hidden= YES;
        if (imageView) {
            return imageView;
        }
    }
    
    return nil;
}

自定义导航控制器push下一个界面的时候的返回按钮

-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (self.viewControllers.count>0) {
        UIButton *backBtn=[DMWidget customButtonWithFrame:CGRectMake(0,0,22, 22) toView:nil];
        [backBtn setImage:[UIImage imageNamed:@"icon_返回"] forState:UIControlStateNormal];
        [backBtn setImage:[UIImage imageNamed:@"icon_返回"] forState:UIControlStateHighlighted];
        //[backBtn setTitle:@"返回" forState:UIControlStateNormal];
       // backBtn.titleLabel.font =[UIFont systemFontOfSize:DMFontSize15];
        //[backBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [backBtn addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
        backBtn.imageEdgeInsets = UIEdgeInsetsMake(0, -5, 0, 5);
        viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backBtn];
    }
    [super pushViewController:viewController animated:animated];

}

#pragma mark - ---------------- 事件 ------------------
#pragma mark - 返回
- (void)backAction
{
    [self popViewControllerAnimated:YES];
}