iOS遍歷程序內某個文件夾下所有文件的屬性

項目中有個文件管理系統，在做本地文件管理操作的時候，遇到了遍歷本地文件的問題

遍歷到的文件有些不需要顯示，而且需要得到文件的相關屬性，在此總結下。

    //查找需要遍歷文件夾的目錄
    NSString *kDocumentsPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
    NSFileManager *fm = [NSFileManager defaultManager];
   [fm createDirectoryAtPath: [kDocumentsPath stringByAppendingPathComponent:@"localFile"] withIntermediateDirectories:YES attributes:nil error:nil];
    NSString *dir = [NSString stringWithFormat:@"%@/localFile",kDocumentsPath];
    NSDirectoryEnumerator *dirEnumerater = [fm enumeratorAtPath:dir];
    NSString *filePath = nil;
    //開始遍歷文件
    while (nil != (filePath = [dirEnumerater nextObject])) {
        NSString *msgdir = [NSString stringWithFormat:@"%@/localFile/%@",kDocumentsPath,filePath];
        BOOL isDir;
        //比對文件類型，刪除不相關類型的文件
        if ([fm fileExistsAtPath:msgdir isDirectory:&isDir]) {
            if (!isDir) {
                if ([[filePath lastPathComponent] isEqualToString:@".DS_Store"]) {
                    continue;
                }
                if ([[filePath lastPathComponent] isEqualToString:@"index.htm"]) {
                    continue;
                }
                if ([[filePath lastPathComponent] isEqualToString:@"index.html"]) {
                    continue;
                }
                
                NSString *fileNameStr = [filePath lastPathComponent];
                NSString *filePath = msgdir;
                //文件修改時間
                NSDictionary *attributes = [fm attributesOfItemAtPath:msgdir error:nil];
                NSDate *theModifiDate;
                if ((theModifiDate = [attributes objectForKey:NSFileModificationDate])) {
                    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
                    [formatter setDateFormat:@"yyyy.MM.dd  HH:mm"];
                    NSString *dateStr = [formatter stringFromDate:theModifiDate];
                    NSFileManager* manager = [NSFileManager defaultManager];
                    long long fileSize;
                    if ([manager fileExistsAtPath:filePath]){
                        fileSize = [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
                    }
                    NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:fileNameStr,@"name",filePath,@"path",dateStr,@"time",@(fileSize),@"size", nil];
                    [localFileArr addObject:dic];
//                     NSLog(@"\n-----文件名%@\n_______文件路徑%@\n======修改時間%@\n-=-=-=-大小  %lld",fileNameStr,filePath,dateStr,fileSize);
                    
                }
            }
        }
    }