- [UIImage imageWithContentsOfFile:photoFilePath]
�通过 imageWithContentsOfFile: 加载的图片系统不会缓存;可以通过GCD�加载提高性能,用字典自己缓存
if(!thumbImage) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
UIImage *image = [UIImage imageWithContentsOfFile:photoFilePath];
UIGraphicsBeginImageContext(CGSizeMake(180.0f, 120.0f));
[image drawInRect:CGRectMake(0, 0, 180.0f, 120.0f)];
thumbImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
dispatch_async(dispatch_get_main_queue(), ^{
[self.photosCache setObject:thumbImage forKey:photoName];
cell.photoView.image = thumbImage;
});
});
}
2.关于UIKit优化
http://www.jianshu.com/p/619cf14640f3
