iOS-常用工具库代码

//一.对文件和文件夹处理

//功能：获取文件夹大小,判断缓存是否过期，超出预设容量，

//备注：文件夹的名字是url通过MD5,Hash得到的字符串。

#pragma mark - Cache Helper- (NSString *)filePathFromRequest:(NSURLRequest *)request isInfo:(BOOL)info{    NSString *url = request.URL.absoluteString;    NSString *fileName = [self cacheRequestFileName:url];    NSString *otherInfoFileName = [self cacheRequestOtherInfoFileName:url];    NSString *filePath = [self cacheFilePath:fileName];    NSString *fileInfoPath = [self cacheFilePath:otherInfoFileName];    if (info) {        return fileInfoPath;    }    return filePath;}- (NSString *)cacheRequestFileName:(NSString *)requestUrl {    return [self md5Hash:[NSString stringWithFormat:@"%@",requestUrl]];}- (NSString *)cacheRequestOtherInfoFileName:(NSString *)requestUrl {    return [self md5Hash:[NSString stringWithFormat:@"%@-otherInfo",requestUrl]];}- (NSString *)cacheFilePath:(NSString *)file {    NSString *path = [NSString stringWithFormat:@"%@/%@",self.diskPath,self.cacheFolder];    NSFileManager *fm = [NSFileManager defaultManager];    BOOL isDir;    if ([fm fileExistsAtPath:path isDirectory:&isDir] && isDir) {        //    } else {        [fm createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];    }    NSString *subDirPath = [NSString stringWithFormat:@"%@/%@/%@",self.diskPath,self.cacheFolder,self.subDirectory];    if ([fm fileExistsAtPath:subDirPath isDirectory:&isDir] && isDir) {        //    } else {        [fm createDirectoryAtPath:subDirPath withIntermediateDirectories:YES attributes:nil error:nil];    }    NSString *cFilePath = [NSString stringWithFormat:@"%@/%@",subDirPath,file];//    NSLog(@"%@",cFilePath);    return cFilePath;}//清除自建的缓存目录- (void)checkCapacity {    if ([self folderSize] > self.diskCapacity) {        [self deleteCacheFolder];    }}- (void)deleteCacheFolder {    [[NSFileManager defaultManager] removeItemAtPath:[self cacheFolderPath] error:nil];}- (NSUInteger)folderSize {    NSArray *filesArray = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:[self cacheFolderPath] error:nil];    NSEnumerator *filesEnumerator = [filesArray objectEnumerator];    NSString *fileName;    unsigned long long int fileSize = 0;    while (fileName = [filesEnumerator nextObject]) {        NSDictionary *fileDic = [[NSFileManager defaultManager] attributesOfItemAtPath:[[self cacheFolderPath] stringByAppendingPathComponent:fileName] error:nil];        fileSize += [fileDic fileSize];    }        return (NSUInteger)fileSize;}#pragma mark - Function Helper- (NSString *)md5Hash:(NSString *)str {    const char *cStr = [str UTF8String];    unsigned char result[16];    CC_MD5( cStr, (CC_LONG)strlen(cStr), result );    NSString *md5Result = [NSString stringWithFormat:                           @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",                           result[0], result[1], result[2], result[3],                           result[4], result[5], result[6], result[7],                           result[8], result[9], result[10], result[11],                           result[12], result[13], result[14], result[15]                           ];    return md5Result;}- (NSString *)cacheFolderPath {    return [NSString stringWithFormat:@"%@/%@/%@",self.diskPath,self.cacheFolder,self.subDirectory];}#pragma mark - Getter- (NSString *)diskPath {    if (!_diskPath) {        _diskPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];    }    return _diskPath;}- (NSMutableDictionary *)responseDic {    if (!_responseDic) {        _responseDic = [NSMutableDictionary dictionaryWithCapacity:0];    }    return _responseDic;}- (NSString *)cacheFolder {    if (!_cacheFolder) {        _cacheFolder = @"Url";    }    return _cacheFolder;}- (NSString *)subDirectory {    if (!_subDirectory) {        _subDirectory = @"UrlCacheDownload";    }    return _subDirectory;}- (NSUInteger)memoryCapacity {    if (!_memoryCapacity) {        _memoryCapacity = 20 * 1024 * 1024;    }    return _memoryCapacity;}- (NSUInteger)diskCapacity {    if (!_diskCapacity) {        _diskCapacity = 200 * 1024 * 1024;    }    return _diskCapacity;}- (NSUInteger)cacheTime {    if (!_cacheTime) {        _cacheTime = 0;    }    return _cacheTime;}