计算并清除缓存/获取文件路径

两个可以放一起

/**

 *  获取文件地址

 */

- (NSString* )getFilePath:(NSString* )filePath

{

    NSArray* array = [filePath componentsSeparatedByString:@"/"];

    NSString* fileName = [array lastObject];

    NSRange range = [filePath rangeOfString:fileName];

    filePath = [filePath stringByReplacingCharactersInRange:range withString:@""];

    if (![[NSFileManager defaultManager] fileExistsAtPath:filePath]) {

        if ([[NSFileManager defaultManager] createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil]) {

            NSLog(@"成功");

        }

    }

    filePath = [filePath stringByAppendingString:fileName];

    return filePath;

}

 

 

 

然后就是计算缓存

/**

 *  计算单个文件大小

 */

- (long long) fileSizeAtPath:(NSString*) filePath

{

    NSFileManager* manager = [NSFileManager defaultManager];

    if ([manager fileExistsAtPath:filePath])

    {

        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];

    }

    return 0;

}

/**

 *  计算缓存大小

 */

- (float ) folderSizeAtPath:(NSString*) folderPath

{

    NSFileManager* manager = [NSFileManager defaultManager];

    if (![manager fileExistsAtPath:folderPath]) return 0;

    NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];

    NSString* fileName;

    long long folderSize = 0;

    while ((fileName = [childFilesEnumerator nextObject]) != nil){

        

        NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];

        

        folderSize += [self fileSizeAtPath:fileAbsolutePath];

    }

    return folderSize/(1000.0*1000.0);

}

 

 直接调用就OK

 

    NSString *cacheAddress = [self getFilePath:[NSHomeDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"Library/Caches"]]];

    NSLog(@"文件地址%@",cacheAddress);

    float cacheSize = [self folderSizeAtPath:cacheAddress];这个地方我只是试一试获取地址能不能用。。可以直接键入Cache文件的Path

    NSLog(@"缓存大小%f",cacheSize);

清除缓存直接用SDWebimage内置方法就OK

[[SDImageCache sharedImageCache]clearDisk];

 

自己对于这方面还很迷惑，仅仅只是能copy一下解决一下需求而已，如果看官有好的讲解博客可以推荐一哈 蟹蟹