Create and save NSString data in to a file

i have 3NSString objects that i want to save to a new file when the app is runnin开发者_开发知识库g.

this will help me for remote debug!

if any one can help me creating the file and save the data to it will be very use full

thanx

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You can save the files to the Documents directory, here is how to get the path to that directory:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:fileName];

And a sample write statement:

NSError *error;
BOOL status = [string writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error];

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In the NSString documentation there is method called writeToFile:atomically:encoding:error:.

NSError *error;
[@"Write me to file" writeToFile:@"<filepath>" atomically:YES encoding: NSUTF8StringEncoding error:&error];

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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents directory

NSError *error; BOOL succeed = [myString writeToFile:[documentsDirectory stringByAppendingPathComponent:@"myfile.txt"]
      atomically:YES encoding:NSUTF8StringEncoding error:&error];
 if (!succeed){
        // Handle error here }

source.

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Here is how to save NSString into Documents folder. Saving other types of data can be also realized that way.

- (void)saveString:(NSString *)stringToSave toDocumentsWithFilename:(NSString *)fileName {

 NSString *documentsFolder = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *path = [documentsFolder stringByAppendingPathComponent:fileName];

 [[NSFileManager defaultManager] createFileAtPath:path contents:[stringToSave dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];

}

Usage:

NSString *stringWeWantToSave = @"This is an elephant";

NSString *fileName = [NSString stringWithString:@"savedString.txt"];

[self saveString:stringWeWantToSave toDocumentsWithFilename:fileName];