去掉导航栏下面黑线

声明属性：

/** 导航栏下面的横线 */

@property (nonatomic, strong) UIImageView *contentLineImageView;

代码：

-(void)viewWillAppear:(BOOL)animated{

[super viewWillAppear:animated];

self.contentLineImageView.hidden = YES;

}

- (void)viewWillDisappear:(BOOL)animated

{

[super viewWillDisappear:animated];

self.contentLineImageView.hidden = NO;

}

#pragma mark -- 去除导航栏下面的横线

- (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;

}

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

self.view.backgroundColor = [UIColor whiteColor];

self.contentLineImageView.hidden = YES;

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

self.contentLineImageView = [[UIImageView alloc] init];

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

}