Re: File Extensions Problem

[Andrew Merenbach]

On Aug 22, 2008, at 12:10 AM, Michael Dautermann wrote:

On Aug 22, 2008, at 2:29 AM, Adil Saleem wrote:

Hi,







Thanx in advance

I want to display in a tableview, list of all media files (audio, video files) present in a certain directory. Currently what i am doing is that i am getting the file names in an NSMutableArray using NSFileManager function directoryContentsAtPath I get the list, but the problem is that it get all the files. I want only those files that have a certain extension (for example mp4, mp3). How can i do that.

You can do something like:

NSString * fullFileName;

en = [ myMutableArray objectEnumerator ]

while(( fullFileName = [ en nextObject ) != NULL )
{
        // if the file is not an .mp3 file...

                [ myMutableArray removeObject: fullFileName ]; // .. remove it

}

After fetching the contents and before displaying contents in the table view, why not enumerate through the mutable array and remove any files that *do not have* the extensions you are looking for. if( [[ fullFileName pathExtension ] compare: @".mp3" options: NSCaseInsensitiveSearch ] != NSOrderedSame ) In other words, [ NSString pathExtension ] could be very helpful to you here.

NSMutableArray *myMutableArray = [myOriginalArray copy];

for (NSString *fullFileName in myOriginalArray) {

                [ myMutableArray removeObject: fullFileName ]; // .. remove it
}

// do something with myMutableArray...



Cheers,
        Andrew

Hi! It appears that you're removing an object from a mutable array while enumerating, so that will unfortunately not work. To modify your concept: if( [[ fullFileName pathExtension ] compare: @".mp3" options: NSCaseInsensitiveSearch ] != NSOrderedSame ) Also of note is that the path extension probably shouldn't have the period in it.

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