在按下 UIButton 之前预加载动画图像

Question

我在视图控制器上有 5 个动画。这已经是非常内存密集型的，因为它们是视网膜质量。

这是我的密码

//Panel 1 Animation
    NSArray *panel1Frames = [NSArray array];
    panel1Frames = [[NSArray alloc] initWithObjects:
                 [UIImage imageNamed:@"origami_panel010001.png"],
                 [UIImage imageNamed:@"origami_panel010002.png"],
                 [UIImage imageNamed:@"origami_panel010004.png"],
                 [UIImage imageNamed:@"origami_panel010005.png"],
                 [UIImage imageNamed:@"origami_panel010006.png"],
                 [UIImage imageNamed:@"origami_panel010007.png"],
                 [UIImage imageNamed:@"origami_panel010008.png"],
                 [UIImage imageNamed:@"origami_panel010009.png"],
                 [UIImage imageNamed:@"origami_panel010010.png"],
                 [UIImage imageNamed:@"origami_panel010011.png"],
                 [UIImage imageNamed:@"origami_panel010012.png"],
                 [UIImage imageNamed:@"origami_panel010013.png"],
                 [UIImage imageNamed:@"origami_panel010014.png"],
                 [UIImage imageNamed:@"origami_panel010015.png"],
                 [UIImage imageNamed:@"origami_panel010016.png"],
                 [UIImage imageNamed:@"origami_panel010017.png"],
                 [UIImage imageNamed:@"origami_panel010018.png"],
                 [UIImage imageNamed:@"origami_panel010019.png"],
                 [UIImage imageNamed:@"origami_panel010020.png"],
                 [UIImage imageNamed:@"origami_panel010021.png"],
                 [UIImage imageNamed:@"origami_panel010022.png"],
                 [UIImage imageNamed:@"origami_panel010023.png"],
                 [UIImage imageNamed:@"origami_panel010024.png"],
                 [UIImage imageNamed:@"origami_panel010025.png"],
                 [UIImage imageNamed:@"origami_panel010026.png"],
                 [UIImage imageNamed:@"origami_panel010027.png"],
                 [UIImage imageNamed:@"origami_panel010028.png"],
                 [UIImage imageNamed:@"origami_panel010029.png"],
                 [UIImage imageNamed:@"origami_panel010030.png"],
                 [UIImage imageNamed:@"origami_panel010031.png"],
                 [UIImage imageNamed:@"origami_panel010032.png"],
                 [UIImage imageNamed:@"origami_panel010033.png"],
                 [UIImage imageNamed:@"origami_panel010034.png"],
                 [UIImage imageNamed:@"origami_panel010035.png"],
                 [UIImage imageNamed:@"origami_panel010036.png"],
                 [UIImage imageNamed:@"origami_panel010037.png"],
                 [UIImage imageNamed:@"origami_panel010038.png"],
                 [UIImage imageNamed:@"origami_panel010039.png"],
                 [UIImage imageNamed:@"origami_panel010040.png"],
                 [UIImage imageNamed:@"origami_panel010041.png"],
                 [UIImage imageNamed:@"origami_panel010042.png"],
                 [UIImage imageNamed:@"origami_panel010043.png"],
                 [UIImage imageNamed:@"origami_panel010044.png"],
                 [UIImage imageNamed:@"origami_panel010045.png"],
                 [UIImage imageNamed:@"origami_panel010046.png"],
                 [UIImage imageNamed:@"origami_panel010047.png"],
                 [UIImage imageNamed:@"origami_panel010048.png"],
                 [UIImage imageNamed:@"origami_panel010049.png"],
                 [UIImage imageNamed:@"origami_panel010050.png"],
                 [UIImage imageNamed:@"origami_panel010051.png"],
                 [UIImage imageNamed:@"origami_panel010052.png"],
                 [UIImage imageNamed:@"origami_panel010053.png"],
                 [UIImage imageNamed:@"origami_panel010054.png"],
                 [UIImage imageNamed:@"origami_panel010055.png"],
                 [UIImage imageNamed:@"origami_panel010056.png"],
                 [UIImage imageNamed:@"origami_panel010057.png"],
                 [UIImage imageNamed:@"origami_panel010058.png"],
                 [UIImage imageNamed:@"origami_panel010059.png"],
                 [UIImage imageNamed:@"origami_panel010060.png"],
                 [UIImage imageNamed:@"origami_panel010061.png"],
                 [UIImage imageNamed:@"origami_panel010062.png"],
                 [UIImage imageNamed:@"origami_panel010063.png"],
                 [UIImage imageNamed:@"origami_panel010064.png"],
                 [UIImage imageNamed:@"origami_panel010065.png"],
                 nil];
    panel1Image.animationImages = panel1Frames;
    panel1Image.animationDuration = 3.0;
    panel1Image.animationRepeatCount = 1;

这是在按下 UIButton 时加载的，是否可以事先加载图像？

此外，有没有办法让它一次只能播放一个动画？这会减少使用的内存量吗？

谢谢！

Answer 1

您的问题是 ios 将图像的实际加载推迟到需要渲染它们。而不是你所拥有的，创建一个名称数组，遍历它们，像现在一样创建一个图像，向它询问它的 CGImage，然后使用它来创建另一个你保存在可变数组中的 uiimage。如果这对您有用，请添加评论，那么规模会很微妙。

如果您担心总内存，可以将 uiimages 放在 NSCache 中。

如果您只想播放一个动画，则在播放一个动画时将其他按钮上的启用设置为关闭。

编辑：如果您真的无法克服记忆的问题，请创建一个演示项目，每个按钮按下一个动画并将其发布到公共站点，然后使用对该项目的引用更新您的原始问题。