iOS计算缓存内容大小

// 计算目录大小

-(float)folderSizeAtPath:(NSString *)path{

    NSFileManager *fileManager=[NSFileManagerdefaultManager];

    float folderSize;

    if ([fileManager fileExistsAtPath:path]) {

        NSArray *childerFiles=[fileManager subpathsAtPath:path];

        for (NSString *fileNamein childerFiles) {

            NSString *absolutePath=[path stringByAppendingPathComponent:fileName];

            folderSize +=[self fileSizeAtPath:absolutePath];

        }

        //SDWebImage框架自身计算缓存的实现

        folderSize+=[[SDImageCache sharedImageCache] getSize]/1024.0/1024.0;

        return folderSize;

    }

    return 0;

}

//计算缓存内容的大小

-(float)fileSizeAtPath:(NSString *)path{

    NSFileManager *fileManager=[NSFileManagerdefaultManager];

    if([fileManager fileExistsAtPath:path]){

        long long size=[fileManagerattributesOfItemAtPath:path error:nil].fileSize;

        return size/1024.0/1024.0;

    }

    return 0;

}

+(void)clearCacheAtPath:(NSString *)path{ NSFileManager *fileManager=[NSFileManager defaultManager]; if ([fileManager fileExistsAtPath:path]) { NSArray *childerFiles=[fileManager subpathsAtPath:path]; for (NSString *fileName in childerFiles) { //如有需要，加入条件，过滤掉不想删除的文件NSString *absolutePath=[path stringByAppendingPathComponent:fileName]; [fileManager removeItemAtPath:absolutePath error:nil]; } }}