简单好用的iOS导航栏封装.runtime属性控制实例代码

@interface UIViewController (YINNav)
/**
 控制屏幕方向 
 在appdelegate 实现
 - (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
  return [[[NSUserDefaults standardUserDefaults] objectForKey:@"orientation"] integerValue];
 }
 */
@property(nonatomic,assign)UIInterfaceOrientationMask y_screenOrientation;

/**
 上级控制器 可设置
 手势返回和pop的时候生效
 */
@property (nonatomic) UIViewController *y_popController;

/**
 是否启用大标题模式 仅支持iOS11 默认为NO 。
 */
@property(nonatomic,assign)BOOL  y_largeTitleMode;

/**
 隐藏nav横线
 */
@property(nonatomic,assign)BOOL  y_navLineHidden;

/**
 nav横线
 */
@property(nonatomic,strong)UIView  *y_navLine;


/**
 字体颜色 默认为[UIColor blackColor]
 */
@property (nonatomic , strong) UIColor *y_navBarTextColor;


/**
 背景颜色 默认为[UIColor whiteColor]
 */
@property (nonatomic , strong) UIColor *y_navBarBgColor;

/**
 背景图 如果设置了背景图 背景色无效
 */
@property (nonatomic , strong) UIImage *y_navBarBgImg;

/**
 设置对应的y_navBarAlpha透明度
 */
@property (nonatomic , assign) CGFloat y_navBarAlpha;

/**
 navagationbar是否隐藏 默认为不隐藏navagationbar
 */
@property (nonatomic , assign) BOOL y_navBarHidden;
@end

//进入页面时设置颜色：灰色
- (void)viewWillAppear:(BOOL)animated{
 [super viewWillAppear:animated];
 [self.navigationController.navigationBar setBarTintColor:[UIColor grayColor]];
}
//离开页面时还原为全局设置：橙色
- (void)viewWillDisappear:(BOOL)animated{
 [super viewWillDisappear:animated];
 [self.navigationController.navigationBar setBarTintColor:[UIColor orangeColor]];
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self.y_navBarBgColor = [UIColor orangeColor];
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self.y_navBarAlpha = 0.999;//如果有渐变 不能设为1 否则会页面会从导航栏下面开始布局。
 self.y_navBarBgColor = [UIColor orangeColor];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
 self.y_navBarAlpha = 0.999-(scrollView.contentOffset.y/400.f);
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self.y_navBarBgColor = [UIColor orangeColor];
}

- (void)viewDidLoad {
 [super viewDidLoad];
 //权重高于背景色
 self.y_navBarBgImg = [UIImage imageNamed:@"app2"];
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self.y_largeTitleMode = YES;
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self.y_navBarHidden = YES;
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self. y_navLineHidden = YES;
}

- (void)viewDidLoad {
 [super viewDidLoad];
 //传一个controller对象 可以是navgationcontroller 栈内的对象
 self.y_popCOntroller= [[YINNavAlphaViewController alloc] init];
}

- (void)viewDidLoad {
 [super viewDidLoad];
 self. y_screenOrientation = UIInterfaceOrientationMaskLandscapeRight;
}