ios - 淡入淡出动画太慢

Question

我制作了一个动画，在一个单元格上淡入淡出。当我按下单元格(整个单元格上的一个按钮)时，操作通过 collectionView 上的协议(protocol)进行委托(delegate)并弹出到另一个 Controller (detailController)。

细胞

 - (IBAction)cellButtonPressed:(id)sender {
    [self fadeIn];
}

-(void)fadeIn {
    [UIView animateWithDuration:0.5
                          delay:0.0
                        options:0.0
                     animations:^{
                         self.coverAlbumPhoto.alpha = 0.0f;
                         self.shadowView.alpha = 0.0f;
                         self.mountainBorderImageView.alpha = 0.0f;

                     } completion:^(BOOL finished) {
                         [self fadeOut];
                     }];
}
-(void)fadeOut {
    [UIView animateWithDuration:0.5
                          delay:0.0
                        options:0.0
                     animations:^{
                         self.coverAlbumPhoto.alpha = 1.0f;
                         self.shadowView.alpha = 1.0f;
                         self.mountainBorderImageView.alpha = 1.0f;

                     } completion:^(BOOL finished) {
                         if ([self.delegate respondsToSelector:@selector(tapCellButtonAtIndexPath:)]) {
                             [self.delegate tapCellButtonAtIndexPath:self.indexPath];
                         }
                     }];
}

Collection View

(void)tapCellButtonAtIndexPath:(NSIndexPath *)indexPath {
    ArtworkModel *artworkModel = (ArtworkModel *)[listOfArtworks objectAtIndex:indexPath.row];

    FBWorkDetailsViewController *dvc = [[FBWorkDetailsViewController alloc] initWithArtwork:artworkModel];
    FBLeftMenuViewController *left = [[FBLeftMenuViewController alloc] init];
    MFSideMenuContainerViewController *container = [MFSideMenuContainerViewController
                                                    containerWithCenterViewController: dvc
                                                    leftMenuViewController: left
                                                    rightMenuViewController:nil
                                                    withHeader: YES];
    [container.titleLabel setText:@"WORK DETAILS"];
    [self.navigationController pushViewController: container animated: YES];
}

问题是动画太慢了。谁能解释我为什么？谢谢。

Answer 1

您有 2 个动画，每个动画的持续时间为 0.5 秒。这给出了 1 秒的总持续时间。如果您希望它更快，请使用更短的持续时间。 0.2 到 0.3 秒的总动画时间可能是一个不错的起点，因此请尝试将每个步骤的持续时间减少到 0.15 秒(总共 0.3 秒)。