网络图片太大后，会自动剪切，导致图片显示不完整

我在源码基础上，进行了优化在- (UICollectionViewCell )collectionView:(UICollectionView )collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath方法中加入缓存机制。

(UICollectionViewCell )collectionView:(UICollectionView )collectionView cellForItemAtIndexPath:(NSIndexPath )indexPath { SDCollectionViewCell cell = [collectionView dequeueReusableCellWithReuseIdentifier:ID forIndexPath:indexPath]; long itemIndex = indexPath.item % self.imagePathsGroup.count;

NSString *imagePath = self.imagePathsGroup[itemIndex];

if (!self.onlyDisplayText && [imagePath isKindOfClass:[NSString class]]) { if ([imagePath hasPrefix:@"http"]) {

    NSURL *url = [NSURL URLWithString:imagePath];
    SDWebImageManager *manager = [SDWebImageManager sharedManager];
    BOOL existBool = [manager diskImageExistsForURL:url];//判断是否有缓存
    UIImage * image;
    if (existBool) {
        image = [[manager imageCache] imageFromDiskCacheForKey:url.absoluteString];
    }else{
        NSData *data = [NSData dataWithContentsOfURL:url];
        image = [UIImage imageWithData:data];
    }

    image = [self imageCompressWithSimple:image scaledToSize:CGSizeMake([UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.width/2)];
    cell.imageView.image = image;

} else {
    UIImage *image = [UIImage imageNamed:imagePath];
    if (!image) {
        [UIImage imageWithContentsOfFile:imagePath];
    }
    cell.imageView.image =   [self imageCompressWithSimple:image scaledToSize:CGSizeMake([UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.width/2)];;
}

} else if (!self.onlyDisplayText && [imagePath isKindOfClass:[UIImage class]]) {

cell.imageView.image = [self imageCompressWithSimple:(UIImage*)imagePath scaledToSize:CGSizeMake([UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.width/2)];

}

if (_titlesGroup.count && itemIndex < _titlesGroup.count) { cell.title = _titlesGroup[itemIndex]; }

if (!cell.hasConfigured) { cell.titleLabelBackgroundColor = self.titleLabelBackgroundColor; cell.titleLabelHeight = self.titleLabelHeight; cell.titleLabelTextColor = self.titleLabelTextColor; cell.titleLabelTextFont = self.titleLabelTextFont; cell.hasConfigured = YES; cell.imageView.contentMode = self.bannerImageViewContentMode; cell.clipsToBounds = YES; cell.onlyDisplayText = self.onlyDisplayText; }

return cell; }

(UIImage)imageCompressWithSimple:(UIImage)image scaledToSize:(CGSize)size { UIGraphicsBeginImageContext(size); [image drawInRect:CGRectMake(0,0,size.width,size.height)]; UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return newImage; } 问题得到了解决！

gsdios / SDAutoLayout

网络图片太大后，会自动剪切，导致图片显示不完整 #227