点击页面，UINavigationController导航栏的隐藏和显示

#pragma mark –  

#pragma mark onClick  

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event  

{  

      isflage=!isflage;  

    [super.navigationController setNavigationBarHidden:isflage animated:TRUE]; 

    [super.navigationController setToolbarHidden:isflage animated:TRUE];  

}