iphone: copy or move file from document directory folder - iphone

Question

Here is my code.
NSArray *pathSong = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *toPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"Songs"];
NSString *fromPath=[[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"abc"];
NSString *strdestination = [fromPath stringByAppendingPathComponent:#"sg.mp3"];
NSError *Error;
if([[NSFileManager defaultManager]fileExistsAtPath:strdestination]){
if([[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error]==NO){
UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:#"copy" message:[NSString stringWithFormat:#"%#",Error] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[Alert show];
}
else{
UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:#"Not copy" message:[NSString stringWithFormat:#"%#",Error] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[Alert show];
}
}
I am getting the error logo :
Error Domain=NSCocoaErrorDominCode=516 "The operation couldn't be
completed .(Cocoa arrow 516.)" userInfo=0x681abf0
NSUnderlyingError =0x681b920 "The operation couldn't be completed
.File exists"
abc folder there is no song name "sg.mp3" but I'm still getting the file exists error. I don't know where I did mistake?

Answer 1

There is two issues in your code:
You need to remove the file if it is already there
You need to specify a name for the destination file, means if you use like:
NSString *toPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"Songs"];
and
[[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error];
Then if copy occurs, it will copy the Sg.mp3 file as Songs without any type.
So you need to write it like:
NSArray *pathSong = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *tempPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"Songs"];
NSString *toPath = [tempPath stringByAppendingPathComponent:#"yourFileName.mp3"];
NSString *fromPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"abc"];
NSString *strdestination = [fromPath stringByAppendingPathComponent:#"sg.mp3"];
NSError *Error = nil;
if([[NSFileManager defaultManager]fileExistsAtPath:strdestination])
{
if([[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error]==NO)
{
UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:#"copy" message:[NSString stringWithFormat:#"%#",Error] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[Alert show];
}
else
{
[fileManager removeItemAtPath:strdestination error:NULL];
UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:#"Not copy" message:[NSString stringWithFormat:#"%#",Error] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[Alert show];
}
}
This code will remove the file if exist at destination and then copy the sg.mp3 from abc folder to Songs folder with the name yourFileName.mp3

Answer 2

Drawing upon the Midhun MP answer, here's a helper
BOOL moveFile(NSString *srcPath, NSString *dstPath)
{
NSLog(#"moving %# -> %#", srcPath, dstPath);
NSFileManager *fm = [NSFileManager defaultManager];
if ([fm fileExistsAtPath:dstPath])
{
// in my usecase this is a hard error, bolt to prevent overwriting
return NO;
}
if ([fm fileExistsAtPath:srcPath])
{
NSError *error = nil;
NSString *destDir = [dstPath stringByDeletingLastPathComponent];
[fm createDirectoryAtPath:destDir withIntermediateDirectories:YES attributes:nil error:nil];
if ([[NSFileManager defaultManager] copyItemAtPath:srcPath toPath:dstPath error:&error]==NO)
{
NSLog(#"failure declassing %#", srcPath);
return NO;
}
else
{
[fm removeItemAtPath:srcPath error:NULL]; // gr8t success
return YES;
}
}
return NO;
}

Answer 3

I think its because you are trying to overwrite a file with your copy.
Check your permission mask, try using the cache instead of the documents directory.
Do you mean if(!fileExistsAtPath)

Answer 4

You need to delete the file that's already there:
NSArray *pathSong = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *toPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"Songs"];
NSString *fromPath=[[pathSong objectAtIndex:0] stringByAppendingPathComponent:#"abc"];
NSString *strdestination = [fromPath stringByAppendingPathComponent:#"sg.mp3"];
NSError *Error;
//DELETE THE FILE AT THE LOCATION YOU'RE COPYING TO
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager removeItemAtPath:strdestination error:NULL];
if([[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error]==NO){
UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:#"copy" message:[NSString stringWithFormat:#"%#",Error] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[Alert show];
}
else{
UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:#"Not copy" message:[NSString stringWithFormat:#"%#",Error] delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[Alert show];
}