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];