iOS UINavigationController导航栏 设置

1. 只有电池栏颜色变化 而且 没有导航栏那条横线

 UIView *statusBarView = [[UIView alloc] initWithFrame:CGRectMake(0, -20, kScreenWidth, 20)];
    
        statusBarView.backgroundColor = kBackgroundColor;
    
        [self.navigationController.navigationBar addSubview:statusBarView];

    
        [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
        //消除阴影
        self.navigationController.navigationBar.shadowImage = [UIImage new];

2. 导航栏字体大小和颜色

 [self.navigationController.navigationBar setTitleTextAttributes:
     
     @{NSFontAttributeName:[UIFont systemFontOfSize:15],
       
       NSForegroundColorAttributeName:[UIColor whiteColor]}];

设置状态栏和导航栏是一致的颜色

self.navigationController.navigationBar.barTintColor = kBackgroundColor;

self.navigationController.navigationBar.translucent = NO;

设置透明的导航栏

 - (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];

    UIImage *image = [[UIImage alloc] init];

    //设置导航栏背景图片为一个空的image，这样就透明了

    [self.navigationController.navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];

    //去掉透明后导航栏下边的黑边

    [self.navigationController.navigationBar setShadowImage:image];

    self.navigationController.navigationBar.barStyle = UIBarStyleBlack;

    self.navigationController.navigationBar.translucent = YES;

}


 - (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:animated];

    [self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];

    [self.navigationController.navigationBar setShadowImage:nil];

    self.navigationController.navigationBar.barStyle = UIBarStyleDefault;

    self.navigationController.navigationBar.translucent = NO;

}