-(void)viewWillAppear:(BOOL)animated{NSArray *array=self.tabBarController.view.subviews;UIView *view=array[2];view.frame=CGRectMake(0, [UIScreen mainScreen ].bounds.size.height, [UIScreen mainScreen ].bounds.size.width, 49);[UIView commitAnimations];}- (void)viewWillDisappear:(BOOL)animated{NSArray *array=self.tabBarController.view.subviews;UIView *view=array[2];view.frame=CGRectMake(0, [UIScreen mainScreen ].bounds.size.height-49, [UIScreen mainScreen ].bounds.size.width, 49);[UIView commitAnimations];}