how to save a file in objective c in xcode with date string concatenated in name?

Question

i want to save an image with new name every time in xcode using objective c. how to do that? i want to add a time string in the name, and i have stored time string in a variable. how to concatenate that variable with the name. code which i am using is as---

    NSDate *currDate = [NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
   [dateFormatter setDateFormat:@"dd.MM.YY HH:mm:ss"];
    NSString *dateString = [dateFormatter stringFromDate:currDate];
    NSLog(@"%@",dateString);`

    NSData *myImageData = UIImageJPEGRepresentation(image, 1.0);
    [fileManager createFileAtPath:@"/Users/name/Desktop/myimage.jpg" contents:myImageData attributes:nil];

Is this really for iPhone? Where would `/Users/name/Desktop/` be on a iPhone? — Peter Segerblom, Sep 23 '15 at 07:10
you'll see a lot of good hints here http://stackoverflow.com/questions/510269/shortcuts-in-objective-c-to-concatenate-nsstrings — Volker, Sep 23 '15 at 08:04
i am working with the simulator , so right now i am saving these images in the mac. — Ravi, Sep 23 '15 at 08:43

score 0 · Answer 1 · answered Sep 23 '15 at 08:11

You already have it 95% complete. You don't want concatenation, as such, as you want to preserve the .jpg file extension, so use [NSString stringWithFormat:] to create the filename:

NSString *filename = [NSString stringWithFormat:@"/Users/name/Desktop/myimage-%@".jpg", dateString];
[fileManager createFileAtPath:filename contents:myImageData attributes:nil];

Hints:

Don't hardcode the path like that; get the user's Documents folder using NSSearchPathForDirectoriesInDomains.
You probably don't want a space in the formatted date string.

please tell about some good pdf to learn the concepts of ios and objective c. — Ravi, Sep 23 '15 at 09:24

how to save a file in objective c in xcode with date string concatenated in name?

1 Answers1