iOS隐藏导航栏底部灰线

首先创建

@interface TestVC()

{

    UIImageView *navBarHairlineImageView;

}

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    navBarHairlineImageView.hidden = YES;

}

- (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;

}在viewDidLoad中加入

 

navBarHairlineImageView =[self findHairlineImageViewUnder:self.navigationController.navigationBar];

 

 

然后就完成了,可以运行看效果了