iOS 计算缓存大小

1.计算Cache文件夹大小,包括了SDWebImage的图片缓存

//根据路径获取大小
-(CGFloat)getCacheNumWithPath:(NSString *)path
{
    NSFileManager *manager = [NSFileManager defaultManager];
    CGFloat size = 0;
    if ([manager fileExistsAtPath:path]) {
        // 目录下的文件计算大小
        NSArray *childrenFile = [manager subpathsAtPath:path];
        for (NSString *fileName in childrenFile) {
            NSString *absolutePath = [path stringByAppendingPathComponent:fileName];
            size += [manager attributesOfItemAtPath:absolutePath error:nil].fileSize;
        }
        //SDWebImage的缓存计算
        size += [[SDImageCache sharedImageCache] getSize]/1024.0/1024.0;
        // 将大小转化为M
        return size / 1024.0 / 1024.0;
    }
    return 0;
}

2.计算数据库的大小

//获取
    NSString *douPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *dbPath = [douPath stringByAppendingPathComponent:@"haha.db"];
    CGFloat dbSize = [[NSFileManager defaultManager] attributesOfItemAtPath:dbPath error:nil].fileSize/ 1024.0 / 1024.0;
    DLog(@"数据库大小--%f",[[NSFileManager defaultManager] attributesOfItemAtPath:dbPath error:nil].fileSize/ 1024.0 / 1024.0);

3.#清除缓存

//清除缓存
-(void)clearAnyeLocalCache
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask,YES);
    NSString *path = [paths lastObject];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:path]) {
        NSArray *childrenFiles = [fileManager subpathsAtPath:path];
        for (NSString *fileName in childrenFiles) {
            // 拼接路径
            NSString *absolutePath = [path stringByAppendingPathComponent:fileName];
            // 将文件删除
            [fileManager removeItemAtPath:absolutePath error:nil];
        }
    }
    //SDWebImage的清除功能
    [[SDImageCache sharedImageCache] clearDisk];
    [[SDImageCache sharedImageCache] clearMemory];
    //删除数据库缓存
    NSString *douPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *dbPath = [douPath stringByAppendingPathComponent:@"haha.db"];
    NSError *error;
    [fileManager removeItemAtPath:dbPath error:&error];
    if (error == nil) {
        [[AnyeDataManager sharedManager] dataBaseDealloc];
        DLog(@"删除数据库成功");
    }else{
        DLog(@"删除数据库失败");
    }
    
}