如何在文档目录中加载带有保存文件列表的UITableView？

Question

How can I load my UITableView with a list of saved files in my documents directory? I just need a small example or a simple online tutorial as I've been pulling my hair out. All the files are saved to the iOS document directory and all I need to do is list them in my UITableView.

Answer 1

NSArray *filePathsArray;

- (void)setUpTheFileNamesToBeListed
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    filePathsArray = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:documentsDirectory  error:nil];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [filePathsArray count];   
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {


    //Insert this line to add the file name to the list
    cell.textLabel.text = [documentsDirectory stringByAppendingPathComponent:[filePathsArray objectAtIndex:indexPath.row]];
}

Answer 2

You can get the path of the documents directory using

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

You will get the list of files in it using

NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:nil];

This array will contain directories as well as files. Enumerate through dirContents and check if it is a file using

- (BOOL)fileExistsAtPath:(NSString *)path

If the file does not exist, either filter that out from the dirContents or else create a new array with paths of only the files that do exist and use that as a datasource for the table view.

Answer 3

From the above two answers you know how to retrieve the files from the document directory.

and Now you want how to open a file when a user tap on te cell.

you just have to use the UITableView delegate function ie

       -(void)tableView(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
        {
               //do all your file opening logic here.
               //your file data is stored in the NSArray myFileData(refer the previous answer posted above)
              //and suppose you want to fetch the data which is in the file, is of type NSURL, means the file data is just a URL link.
        //just declare a NSURL in your .h(say myURL) (synthesize it etc)


        myURL=[NSURL URLWithString:[myFileData objectAtIndex:indexPath.row]]
         }

now your myURL is having the link which is stored in the file and then you can use that url in your webView.