我有的
对于我的游戏,我正在使用 view.animationImages = imagesArray; 创建几个动画。[查看开始动画];
在我的动画助手类中,我使用它
- (UIImage *)loadRetinaImageIfAvailable:(NSString *)path
{
NSString *retinaPath = [[path stringByDeletingLastPathComponent] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@@2x.%@", [[path lastPathComponent] stringByDeletingPathExtension], [path pathExtension]]];
if ([UIScreen mainScreen].scale == 2.0 && [[NSFileManager defaultManager] fileExistsAtPath:retinaPath] == YES)
return [[UIImage alloc] initWithCGImage:[[UIImage imageWithData:[NSData dataWithContentsOfFile:retinaPath]] CGImage] scale:2.0 orientation:UIImageOrientationUp];
else
return [UIImage imageWithContentsOfFile:path];
}
- (NSMutableArray *)generateCachedImageArrayWithFilename:(NSString *)filename extension:(NSString *)extension andImageCount:(int)count
{
_imagesArray = [[NSMutableArray alloc] init];
_fileExtension = extension;
_imageName = filename;
_imageCount = count;
for (int i = 0; i < count; i++)
{
NSString *tempImageNames = [NSString stringWithFormat:@"%@%i", filename, i];
NSString *imagePath = [[NSBundle mainBundle] pathForResource:tempImageNames ofType:extension];
UIImage *frameImage = [self loadRetinaImageIfAvailable:imagePath];
UIGraphicsBeginImageContext(frameImage.size);
CGRect rect = CGRectMake(0, 0, frameImage.size.width, frameImage.size.height);
[frameImage drawInRect:rect];
UIImage *renderedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[_imagesArray addObject:renderedImage];
if (_isDoublingFrames)
{
[_imagesArray addObject:renderedImage];
}
else if (_isTriplingFrames)
{
[_imagesArray addObject:renderedImage];
[_imagesArray addObject:renderedImage];
}
NSLog(@"filename = %@", filename);
}
return _imagesArray;
}
问题和事实
- 如果没有缓存图像,我会得到视网膜版本的图像,因为我的动画不流畅
- 如果我以这种方式缓存图像,动画还可以,但使用非视网膜版本的图像
请问还有其他方法可以缓存和获取视网膜版本吗?