IQKeyBoardManager遇到的坑

//视图控制器已经加载完成之后,禁用IQKeyboardManager
- (void)viewDidAppear:(BOOL)animated
 {
       [super viewDidAppear:animated];
       [[IQKeyboardManager sharedManager] setEnable:NO];
 }
//视图控制器已经消失,开启IQKeyboardManager
-(void)viewDidDisappear:(BOOL)animated
{
  [super viewDidDisappear:animated];
 [[IQKeyboardManager sharedManager] setEnable:YES];
}