将NavigationBar背景设置为纯色

Question

Is there any way I can set the background of the Navigation Bar of the UINavigationController to a solid color?

I know I can change the Tint color, but that still leaves me with the gradient/glass effect.

Any way I can get rid of that, and just have a plain old solid color?

Answer 1

The following code also results in solid color of navigation bar:

[[UINavigationBar appearance] setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setBackgroundColor:[UIColor redColor]];

Answer 2

I think you have to subclass UINavigationBar and override -(void)drawRect:(CGRect)rect :

UIColor *colorFlat = /* any UIColor*/
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [colorFlat CGColor]);
CGContextFillRect(context, rect);

Answer 3

I used to override drawRect method and fill color; but after iOS7 upgrade it causes some problems on UINavigationBar. If you write your own drawrect method, even if you call [super drawRect], it changes the bar's dimension and you end up with a navigationBar with 44 pixels height. The status bar is left empty.

To get a solid colored navigationBar, I used an image as background image (any small solid colored image will do since you are stretching it) and added this lines inside the initWithFrame method of the UINavigationBar subclass:

[self setBackgroundColor:[UIColor clearColor]]     
[[UINavigationBar appearance] setBackgroundImage:[[UIImage imageNamed:@"bgimage.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(5, 5, 5, 5) resizingMode:UIImageResizingModeStretch] forBarMetrics:UIBarMetricsDefault]; 

Answer 4

The following code worked for me:

[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setBarTintColor:[UIColor greenColor]];
self.navigationController.navigationBar.translucent = NO;
[self.navigationController.navigationBar setShadowImage:[UIImage new]];

Answer 5

Create a CustomUIViewController that extends UIViewController and override viewDidLoad to something like this:

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.view.backgroundColor = [UIColor colorWithRed: 0.0 green: 0.0 blue: 1.0 alpha: 1.0];
}

After that, use your CustomUIViewController in your controllers.

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