iOS中计算缓存文件的大小判断

//获取缓存文件路径

-(NSString *)getCachesPath{

    // 获取Caches目录路径

    NSArray *paths
= NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask,YES);

    NSString *cachesDir = [paths objectAtIndex:0];

    

    NSString *filePath = [cachesDir stringByAppendingPathComponent:@"com.nickcheng.NCMusicEngine"];

    

    return filePath;

}

///计算缓存文件的大小的M

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

    NSFileManager* manager = [NSFileManager defaultManager];

    if ([manager fileExistsAtPath:filePath]){

        

//        //取得一个目录下得所有文件名

//        NSArray *files = [manager subpathsAtPath:filePath];

//        NSLog(@"files1111111%@ == %ld",files,files.count);

//        

//        // 从路径中获得完整的文件名（带后缀）

//        NSString *exe = [filePath lastPathComponent];

//        NSLog(@"exeexe ====%@",exe);

//        

//        // 获得文件名（不带后缀）

//        exe = [exe stringByDeletingPathExtension];

//        

//        // 获得文件名（不带后缀）

//        NSString *exestr = [[files objectAtIndex:1] stringByDeletingPathExtension];

//        NSLog(@"files2222222%@  ==== %@",[files objectAtIndex:1],exestr);

        

        

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

    }

    

    return 0;

}

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

    NSFileManager* manager = [NSFileManager defaultManager];

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

    NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];//从前向后枚举器／／／／//

    NSString* fileName;

    long long folderSize = 0;

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

        NSLog(@"fileName ==== %@",fileName);

        NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];

        NSLog(@"fileAbsolutePath ==== %@",fileAbsolutePath);

        folderSize += [self fileSizeAtPath:fileAbsolutePath];

    }

    NSLog(@"folderSize
==== %lld",folderSize);

    return folderSize/(1024.0*1024.0);

}

////////////

-(void)ss{

    // 获取Caches目录路径

    NSArray *paths
= NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask,YES);

    NSString *cachesDir = [paths objectAtIndex:0];

    

    NSLog(@"cachesDircachesDir
== %@",cachesDir);

    //读取缓存里面的具体单个文件/或全部文件//

    NSString *filePath = [cachesDir stringByAppendingPathComponent:@"com.nickcheng.NCMusicEngine"];

    NSArray *array = [[NSArray alloc]initWithContentsOfFile:filePath];

    NSLog(@"filePathfilePath%@
==array==== %@",filePath, array);

    

    

    NSFileManager* fm=[NSFileManager defaultManager];

    if([fm fileExistsAtPath:filePath]){

        //取得一个目录下得所有文件名

        NSArray *files = [fm subpathsAtPath:filePath];

        NSLog(@"files1111111%@ == %ld",files,files.count);

        

        // 获得文件名（不带后缀）

        NSString *
exestr = [[files objectAtIndex:1] stringByDeletingPathExtension];

        NSLog(@"files2222222%@  ==== %@",[files objectAtIndex:1],exestr);

    }

}