IOS - File write content to file

write_to_file.m

// Define directory and file path
NSString *documentDir = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *filePath = [documentDir stringByAppendingPathComponent:@"file1.txt"];

// Write NSArray to file
NSArray *numbers = @[@12, @124, @214214];
[numbers writeToFile: filePath atomically:YES];

NSError *error;

// List all Files in the directory
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *contents = [fileManager contentsOfDirectoryAtPath:documentDir error: &error];

// Remove Item
[fileManager removeItemAtPath:filePath error: &error];