隐藏导航栏的下划线

现在.m文件中定义 UIImageView *navBarHairlineImageView;在- (void)viewWillAppear:(BOOL)animated方法中navBarHairlineImageView.hidden = YES;然后自定义方法

//实现找出底部横线的函数

- (UIImageView *)findHairlineImageViewUnder:(UIView *)view {

    if ([view isKindOfClass:UIImageView.class] && view.bounds.size.height <= 1.0) {

        return (UIImageView *)view;

    }

    for (UIView *subview in view.subviews) {

        UIImageView *imageView = [self findHairlineImageViewUnder:subview];

        if (imageView) {

            return imageView;

        }

    }

    return nil;

}

 最后在viewdidload中调用   navBarHairlineImageView = [self findHairlineImageViewUnder:self.navigationController.navigationBar];

隐藏导航栏的下划线

原文：http://www.cnblogs.com/xiaolingling1126/p/5083039.html