In the previous section, you learned about the Document directories. Now, in this section we will explore this in more detail. You will learn about saving RAW files in our application's document directory.
We will use the preceding project for this section as well. So, open the project and follow the next section.
Perform the following steps to write data into your Documents directory:
Now, we will create a
.txtfile in our folder (which we created in the document directory). Customize the code inviewDidLoad:as follows:dataPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:@"myfile.txt"]; NSLog(@"%@", dataPath);
The preceding code will create a
.txtfile of namemyfile.txt.To write something into the file, add the following code:
NSError *error; NSString *stringToWrite = @"1\n2\n3\n4"; dataPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:@"myfile.txt"]; [stringToWrite writeToFile:dataPath atomically:YES encoding:NSUTF8StringEncoding error:&error];
The
writeToFilemethod is used to write data in our file.Now, to read the data from the file, there's the
stringWithContentsOfFilemethod. So add the following method inside the code:NSString *str = [NSString stringWithContentsOfFile:dataPath encoding:NSUTF8StringEncoding error:&error]; NSLog(@"%@", str);
To see the
mayflies.txtfile in theDocumentsdirectory, go to theGoToFolderfinder and pastedataPathfrom the console. It will take you tomayflies.txt. The final file should look something like the following screenshot:
In the screenshot, you can see the two files have been created. As per our code, we have created
myfile.txtandmyfile.pdf. We have also createdMyFolderin the sameDocumentsfolder of the app.