當(dāng)導(dǎo)航欄多出了黑線是imageView導(dǎo)致的.通過下面的這兩個方法可以去掉導(dǎo)航欄上面的細(xì)線.
//隱藏黑線
-(void)useMethodToFindBlackLineAndHind:(BOOL)isHidden
{
UIImageView* blackLineImageView = [self findHairlineImageViewUnder:self.navigationController.navigationBar];
//隱藏黑線（在viewWillAppear時隱藏创夜，在viewWillDisappear時顯示）
blackLineImageView.hidden = isHidden;
}
- (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;
}
