简单设置 navgationbar(导航栏) 的 title 字体跟颜色

                NSDictionary *navbarTitleTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                                                                                     [UIColor whiteColor],UITextAttributeTextColor,
                                                                                                     [UIColor blackColor], UITextAttributeTextShadowColor,
                                                                                                     [UIFont fontWithName:CHINESE_FONT_NAME size:20.0f],UITextAttributeFont,
                                                                                                     [NSValue valueWithUIOffset:UIOffsetMake(-, )], UITextAttributeTextShadowOffset, nil];
                [[UINavigationBar appearance] setTitleTextAttributes:navbarTitleTextAttributes];