sdwebimage에서 그림을 캐시하지 않고 매번 URL을 다시 불러옵니다
1791 단어 프로젝트 실용성
SDWebImageDownloader *imgDownloader = SDWebImageManager.sharedManager.imageDownloader;
imgDownloader.headersFilter = ^NSDictionary *(NSURL *url, NSDictionary *headers) {
NSFileManager *fm = [[NSFileManager alloc] init];
NSString *imgKey = [SDWebImageManager.sharedManager cacheKeyForURL:url];
NSString *imgPath = [SDWebImageManager.sharedManager.imageCache defaultCachePathForKey:imgKey];
NSDictionary *fileAttr = [fm attributesOfItemAtPath:imgPath error:nil];
NSMutableDictionary *mutableHeaders = [headers mutableCopy];
NSDate *lastModifiedDate = nil;
if (fileAttr.count > 0) {
if (fileAttr.count > 0) {
lastModifiedDate = (NSDate *)fileAttr[NSFileModificationDate];
}
}
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
formatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
formatter.dateFormat = @"EEE, dd MMM yyyy HH:mm:ss z";
NSString *lastModifiedStr = [formatter stringFromDate:lastModifiedDate];
lastModifiedStr = lastModifiedStr.length > 0 ? lastModifiedStr : @"";
[mutableHeaders setValue:lastModifiedStr forKey:@"If-Modified-Since"];
return mutableHeaders;
};
SDWebImageRefreshCached 사용
[myCell.iconView3 sd_setImageWithURL:iconArray[2]
placeholderImage:[UIImage imageNamed:@"icon"]
options:SDWebImageRefreshCached];