导航栏常用代码

//iOS7 修改导航条背景色

    [[UINavigationBar appearance] setBarTintColor:UIColorFromRGB(0x067AB5)];

    

    //iOS7 修改导航条上面返回按钮标题颜色，如果不修改返回的indicator <也是这样颜色

    [[UINavigationBar appearance] setTintColor:[UIColor redColor]];

    //自定义导航条背景图片

    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"nav_bg_ios7.png"] forBarMetrics:UIBarMetricsDefault];

    

    //iOS7 自定义返回文字左边的indicator图标 即<

    [[UINavigationBar appearance] setBackIndicatorImage:[UIImage imageNamed:@"back_btn.png"]];

    [[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"back_btn.png"]];

    

    

    //自定义导航条的标题样式

    NSShadow *shadow = [[NSShadow alloc] init];

    shadow.shadowColor = [UIColor colorWithRed:0.0 green:1.0 blue:0.0 alpha:0.8];

    shadow.shadowOffset = CGSizeMake(1, 1);//x:左右偏移量，左﹣右+;y:上下偏移量，上-下+

    shadow.shadowBlurRadius = 200;

    [[UINavigationBar appearance] setTitleTextAttributes: [NSDictionary dictionaryWithObjectsAndKeys:

                                                           [UIColor colorWithRed:245.0/255.0 green:245.0/255.0 blue:245.0/255.0 alpha:1.0], NSForegroundColorAttributeName,

                                                           shadow, NSShadowAttributeName,

                                                           [UIFont fontWithName:@"HelveticaNeue-CondensedBlack" size:21.0], NSFontAttributeName, nil]];

//设置导航上面的提示信息：

self.navigationItem.prompt = @"This is a prompt";