iOS Hidden nav bar 1px bottom horizontal line

This line is available by default

The first method:

Uinavigationbar *navigationbar = Self.navigationController.navigationBar; //White.png picture yourself download a pure white color block, or your own PS to do a [Navigationbar setbackgroundimage:[uiimage imagenamed:@ "White.png"]                   Forbarposition:uibarpositionany                       New]];

The post-run effect is as follows (the original gray background color will be replaced by White.png):

PS: This is the only official usage that hides this line, but there is a flaw-removed translucency (translucent)

The second method: 1) Declares the Uiimageview variable, storing the bottom horizontal line

@implementation Myviewcontroller {    *navbarhairlineimageview;}

2) Add in Viewdidload:

[Self findhairlineimageviewunder:navigationbar];

3) Realize the function of finding the bottom horizontal line

-(Uiimageview*)Findhairlineimageviewunder: (UIView*)View {  if([view IsKindOfClass:UIImageView.class] && view.bounds.size.height <=1.0) {      return(Uiimageview*)View  }   for(UIView*subviewIn View.subviews) {    Uiimageview*imageview= [self Findhairlineimageviewunder:subview];    if(ImageView) {      returnImageView;    }  }  returnNil;}

4) finally processed in the Viewwillappear,viewwilldisappear

-(void) Viewwillappear: (BOOL) animated {  [Super viewwillappear:animated];    Navbarhairlineimageview.hidden = YES;} -(void) Viewwilldisappear: (BOOL) animated {  [Super Viewwilldisappear: Animated];    navbarhairlineimageview.hidden = NO;}

The effect is as follows:

PS: The second method can keep bar translucent

iOS Hidden nav bar 1px bottom horizontal line