navigationController

    [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];

    self.navigationController.navigationBar.shadowImage = [UIImage new];

    self.navigationController.navigationBar.translucent = YES; 

    self.navigationController.navigationBar.translucent =YES;

    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];  // 背景透明设置

 

 

    [self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor    blackColor],NSFontAttributeName:[UIFont systemFontOfSize:19.0]}];  // 字体设置

    self.navigationController.navigationBar.tintColor = ColorGreen; 

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"nav_masterBackButton"] style:UIBarButtonItemStylePlain target:self action:@selector(popSelfVC)];