动画大标题

self.title = @"我是标题";
self.navigationController.navigationBar.prefersLargeTitles = YES;

• (void)viewDidLoad {
  [super viewDidLoad];

  UILabel * textView = [[UILabel alloc]initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 30)];
  textView.text = @“八十多分卡是经典款拉屎的法师打发”;
  [self.view addSubview:textView];

  [UIView animateWithDuration:3 delay:2 options:UIViewAnimationOptionRepeat animations:^{
  //怎样的动画
  textView.frame = CGRectMake(-self.view.frame.size.width, 100,self.view.frame.size.width , 30);

  } completion:^(BOOL finished) {
  NSLog(@“动画结束”);
  }];
  }