writeFileTest.m

#import <Foundation/Foundation.h>

void checkIfFileExist(NSString *path)
{
    NSFileManager *fileManager = [NSFileManager defaultManager];

    if ( [fileManager fileExistsAtPath:path] )
        NSLog(@"File exists!");
    else
        NSLog(@"File is missing!!!!");
}

int main(void) 
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];


    // init dummy data
    NSArray *array = [[NSArray alloc]
        initWithObjects:@"test1", @"test2", @"test3", nil];


    // Find the filename and path of the test file.
    NSArray *paths =
        NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                            NSUserDomainMask, YES);

    NSString *documentsPath = [paths objectAtIndex:0];

    NSString *testDataPath = [documentsPath
        stringByAppendingPathComponent:@"testData.plist"];


    // Check if file exists
    checkIfFileExist(testDataPath);

    // Write out the file
    [array writeToFile:testDataPath atomically:YES];

    // Check if file exists again
    checkIfFileExist(testDataPath);


    // Clean up and exit
    [array release];
    [pool release];

    return 0;
}