Swift：writeToFile不保存iOS设备上的文件

Question

I have a string I read from a text file: text = String(contentsOfFile: path!, encoding: NSUTF8StringEncoding, error: nil)! . Using println(text) I get the output "some text".

Now I also have another string otherSting = "other text" . What I want to do is save this text to the text file. I tried using otherText.writeToFile(path!, atomically: true, encoding: NSUTF8StringEncoding, error: nil) and then reading the text file again. When trying on the iOS Simulator I get the output I expected: "other text". But when executing the same app on my iPhone i still get "some text". Does anybody know what I am doing wrong?

Edit:

I also tried using otherText.writeToURL(url!, atomically: true, encoding: NSUTF8StringEncoding, error: nil) with the same results.

Thanks in advance

Answer 1

If you get the old text, you are clearly reading the old file. Make sure you have two different path or url variables.

What happened most likely is that you saved to file1, tried to overwrite that same file1 which failed silently, so that file1 contains the original data.

Also, as Paulw has pointed out, you cannot write to your bundle. Instead you have to copy files to the application documents directory first, or create them there.