iOS中自定义导航控制器NavigationController

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#import "NavigationController.h"@interface NavigationController ()@end@implementation NavigationController- (void)viewDidLoad {    [super viewDidLoad];   }/** *  系统在第一次使用这个类的时候调用 */+(void)initialize{    //1.设置导航栏主题    UINavigationBar *navBar=[UINavigationBar appearance];            NSString *bgName=nil;        if (iOS7) {            bgName=@"NavBar64";            //箭头的颜色            navBar.tintColor=[UIColor whiteColor];            }else{        bgName=@"NavBar";        }        //设置背景图片    [navBar setBackgroundImage:[UIImage imageNamed:bgName] forBarMetrics:UIBarMetricsDefault];    //设置标题文字颜色    NSMutableDictionary *attrs=[NSMutableDictionary dictionary];    attrs[NSFontAttributeName]=[UIFont systemFontOfSize:18];    attrs[NSForegroundColorAttributeName]=[UIColor whiteColor];    [navBar setTitleTextAttributes:attrs];    //2.设置BarButtonItem的主题    UIBarButtonItem *item=[UIBarButtonItem appearance];     //设置文字颜色    NSMutableDictionary *itemAttrs=[NSMutableDictionary dictionary];    itemAttrs[NSFontAttributeName]=[UIFont systemFontOfSize:14];    itemAttrs[NSForegroundColorAttributeName]=[UIColor whiteColor];    [item setTitleTextAttributes:itemAttrs forState:UIControlStateNormal];    if (!iOS7) {        //设置导航按钮背景        [item setBackgroundImage:[UIImage imageNamed:@"NavBackButton"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];        [item setBackgroundImage:[UIImage imageNamed:@"NavBackButtonPressed"] forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];                //设置返回按钮的背景        [item setBackButtonBackgroundImage:[UIImage imageNamed:@"NavBackButton"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];        [item setBackButtonBackgroundImage:[UIImage imageNamed:@"NavBackButtonPressed"] forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];    }}/** *  重写这个方法，能拦截所有的push操作，隐藏tabBar * */-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{    viewController.hidesBottomBarWhenPushed=YES;    [super pushViewController:viewController animated:animated];   }//-(UIViewController *)popViewControllerAnimated:(BOOL)animated//{//    return [super popViewControllerAnimated:NO];//}@end
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