如何从iOS中的文档目录复制所有文本文件？

Question

I need to Copy all text files (.txt) from document directory into my folder name "Text".

I can copy only one files.

I want to copy like (*.txt) with one touch.

Here codes is my single file copy.

self.fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *cutExtension = [tblGetNameToMove.textLabel.text stringByDeletingPathExtension];

NSString *txtPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.txt",cutExtension]];

NSString *fileName = [NSString stringWithFormat:@"%@/Text/%@.txt",documentsDirectory,cutExtension];

[self.fileManager copyItemAtPath:txtPath toPath:fileName error:&error];

How can i do that?

Answer 1

Get all the contents in the folder

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

NSArray *fileList = [[NSFileManager defaultManager] directoryContentsAtPath:documentsDirectory];

Enumerate over the files list and check if it constains .txt

[fileList enumerateObjectsUsingBlock:^(NSString *string, NSUInteger index, BOOL *stop) {

  if ([string hasSuffix:@".txt"]) {
    [[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error];
  }
}];

Update

Updated my answer according to comments by Martin R

Update 2

As pointed out by Hot Licks use

if ([[string pathExtension] isEqualToString:@"txt"]) {

To check for the file extension.