近期想做一個跑馬燈的效果，於是寫出了如下的跑馬燈效果的代碼。。。但是調試發現，在iOS6下動畫是可以執行的，但是在iOS7下動畫並不執行，沒有達到預期的效果。

[_scrollLabel sizeToFit];
    CGRect frame = _scrollLabel.frame;
    frame.origin.x = 320;
    _scrollLabel.frame = frame;
    [UIView setAnimationsEnabled:YES];
    [UIView beginAnimations:@"testAnimation" context:NULL];
    [UIView setAnimationDuration:10.f];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationRepeatAutoreverses:NO];
    [UIView setAnimationRepeatCount:999999];
    frame = _scrollLabel.frame;
    frame.origin.x = -frame.size.width;
    NSLog(@"frame orgin:%f",frame.origin.x);
    _scrollLabel.frame = frame;
    [UIView commitAnimations];

然後在網上查了各種資料，都沒有解決。。。最終發現，我的這個視圖控制器是present模態化視圖，在iOS7下模態化出來的視圖UIView就出現問題了。。。果斷把present換成了push。。。但是push又達不到prensent的效果，於是又模仿present，在push視圖中實現present動畫。代碼如下：

一、push

MCLotteryListViewController *list = [[MCLotteryListViewController alloc]init];
    //list.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
//    [self presentViewController:list animated:YES completion:^{
//        
//    }];
    [UIView  beginAnimations:nil context:NULL];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDuration:0.75];
    [self.navigationController pushViewController:list animated:NO];
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.navigationController.view cache:NO];
    [UIView commitAnimations];

二、pop

[UIView  beginAnimations:nil context:NULL];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDuration:0.75];
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.navigationController.view cache:NO];
    [UIView commitAnimations];
    
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDelay:0.375];
    [self.navigationController popViewControllerAnimated:NO];
    [UIView commitAnimations];

轉載請注明，錯誤請指正！