blocks|key|829385|text|除了UINavigationBar的tintColor属性之外，我不认为有其他方法可以更改导航颜色的边框颜色。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|829386|我建议您创建一个具有该边框大小的UIView，并将其放在导航栏下方/将其添加为subView。|829387|UIView+*navBorder+=+[[UIView+alloc]+initWithFrame:CGRectMake(0,navigationBar.frame.size.height-1,navigationBar.frame.size.width,+1)];+

//+Change+the+frame+size+to+suit+yours+//

[navBorder+setBackgroundColor:[UIColor+colorWithWhite:200.0f/255.f+alpha:0.8f]];
[navBorder+setOpaque:YES];
[navigationBar+addSubview:navBorder];
[navBorder+release];|code-block|syntax|javascript|829388|entityMap^0|2|F|I|9|0|13|7|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

I do not think there is a method to change the border color of the navigation color, other than the <code>tintColor</code> property of the <code>UINavigationBar</code>. 

I would suggest that you create a UIView of that border size and place it below the navigation bar / add it as a <code>subView</code>.

<pre><code>UIView *navBorder = [[UIView alloc] initWithFrame:CGRectMake(0,navigationBar.frame.size.height-1,navigationBar.frame.size.width, 1)]; 

// Change the frame size to suit yours //

[navBorder setBackgroundColor:[UIColor colorWithWhite:200.0f/255.f alpha:0.8f]];
[navBorder setOpaque:YES];
[navigationBar addSubview:navBorder];
[navBorder release];
</code></pre>

blocks|key|829498|text|您还可以在导航栏中添加子视图|type|unstyled|depth|inlineStyleRanges|entityRanges|data|829499|下面的代码将在导航栏下面添加一个4像素深的蓝色边框|829500|UINavigationBar*+navBar+=+self.navigationController.navigationBar;
++++int+borderSize+=+4;
++++UIView+*navBorder+=+[[UIView+alloc]+initWithFrame:CGRectMake(0,navBar.frame.size.height-borderSize,navBar.frame.size.width,+borderSize)];
++++[navBorder+setBackgroundColor:[UIColor+blueColor]];
++++[self.navigationController.navigationBar+addSubview:navBorder];|code-block|syntax|javascript|829501|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can also add a child view to your nav bar 

The following code will add a 4 pixel deep blue border below your navigation bar 

<pre><code>UINavigationBar* navBar = self.navigationController.navigationBar;
 int borderSize = 4;
 UIView *navBorder = [[UIView alloc] initWithFrame:CGRectMake(0,navBar.frame.size.height-borderSize,navBar.frame.size.width, borderSize)];
 [navBorder setBackgroundColor:[UIColor blueColor]];
 [self.navigationController.navigationBar addSubview:navBorder];
</code></pre>

blocks|key|614311|text|尽管navigationBar是UINavigationController的只读属性，但您可以通过"setValue:forKey:“来避免此限制。该方法在成功提交给AppStore的5个申请中获得批准。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|614312|您可以根据需要子类化UINavigationBar并更改drawRect:+method。例如,|614313|@implementation+CustomNavigationBar

-+(void)+drawRect:(CGRect)rect
{
++++[super+drawRect:rect];
++++UIImage+*backgroundImage+=+ImageFromColor(WANTED_COLOR);
++++[backgroundImage+drawInRect:rect];
}|code-block|syntax|javascript|614314|在您可以子类化UINavigationController并更改initWithRootViewController之后：|614315|-+(id)+initWithRootViewController:(UIViewController+*)rootViewController
{
++++self+=+[super+initWithRootViewController:rootViewController];+
++++if+(self)+
++++{
++++++++CustomNavigationBar+*navBar+=+[CustomNavigationBar+new];
++++++++[self+setValue:navBar+forKey:@"navigationBar"];
++++}
++++return+self;
}|614316|您还可以通过为UINavigationController设置Category并为initWithRootViewController实现方法swizzling来改变这种方法：|614317|附注:昨天我的新应用程序在AppStore上出现了，这种方法没有任何问题。|614318|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Despite navigationBar is read-only property for UINavigationController you can avoid
this restriction by "setValue:forKey:". This method was approved on 5 applications successfully submitted to AppStore.

You can subclass UINavigationBar and change drawRect: method as you want.
For example,

<pre><code>@implementation CustomNavigationBar

- (void) drawRect:(CGRect)rect
{
 [super drawRect:rect];
 UIImage *backgroundImage = ImageFromColor(WANTED_COLOR);
 [backgroundImage drawInRect:rect];
}
</code></pre>

After you can subclass UINavigationController and change initWithRootViewController:

<pre><code>- (id) initWithRootViewController:(UIViewController *)rootViewController
{
 self = [super initWithRootViewController:rootViewController]; 
 if (self) 
 {
 CustomNavigationBar *navBar = [CustomNavigationBar new];
 [self setValue:navBar forKey:@"navigationBar"];
 }
 return self;
}
</code></pre>

Also you can vary this approach by making Category for UINavigationController and implementing method swizzling for initWithRootViewController:

P.S. Yesterday my new app appeared at AppStore without any problem with this approach.

blocks|key|829737|text|对于iOS+7，您可以使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|829738|[self.navigationController.navigationBar+setShadowImage:[UIImage+new]];|code-block|syntax|javascript|829739|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For iOS 7 you could use this:

<pre><code>[self.navigationController.navigationBar setShadowImage:[UIImage new]];
</code></pre>

blocks|key|829838|text|在Swift中，@Legolas回答：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|829839|if+let+navigationController+=+self.navigationController+{

+++let+navigationBar+=+navigationController.navigationBar+++++
+++let+navBorder:+UIView+=+UIView(frame:+CGRectMake(0,+navigationBar.frame.size.height+-+1,+navigationBar.frame.size.width,+1))
+++//+Set+the+color+you+want+here
+++navBorder.backgroundColor+=+UIColor(red:+0.19,+green:+0.19,+blue:+0.2,+alpha:+1)
+++navBorder.opaque+=+true
+++self.navigationController?.navigationBar.addSubview(navBorder)
}|code-block|syntax|javascript|829840|你可以输入你的UIViewController的viewDidLoad()。|offset|length|style|CODE|829841|entityMap^0|0|0|7|G|O|D|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

In Swift like the @Legolas answer:

<pre><code>if let navigationController = self.navigationController {

 let navigationBar = navigationController.navigationBar 
 let navBorder: UIView = UIView(frame: CGRectMake(0, navigationBar.frame.size.height - 1, navigationBar.frame.size.width, 1))
 // Set the color you want here
 navBorder.backgroundColor = UIColor(red: 0.19, green: 0.19, blue: 0.2, alpha: 1)
 navBorder.opaque = true
 self.navigationController?.navigationBar.addSubview(navBorder)
}
</code></pre>

You can put in the <code>viewDidLoad()</code> of your <code>UIViewController</code>.

Can anyone advise me on how the border below the navigation bar can be changed?

<img src="https://i.stack.imgur.com/tXmVz.png" alt="enter image description here">

I would like to change it from the current black light to a softer color.
Appreciate any help here

How to change the border color below the navigation bar?

有人能告诉我如何更改导航栏下面的边框吗？​​我想把它从现在的黑色换成柔和的颜色。感谢这里的任何帮助

问如何更改导航栏下方的边框颜色？
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