iOS: How to access PList File

ios_plist_file_access.m

Check first if PLIST exist

NSArray *myPath = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [myPath objectAtIndex:0]; 
NSString *myPlistPath = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat: @"%@.plist", plistName] ]; 
[myPlistPath retain];

// If it's not there, copy it from the bundle 
NSFileManager *fileManger = [NSFileManager defaultManager]; 
if ( ![fileManger fileExistsAtPath:myPlistPath] ) { 
    NSString *pathToSettingsInBundle = [[NSBundle mainBundle] pathForResource:plistName ofType:@"plist"]; 
}

Read PLIST

NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectoryPath = [paths objectAtIndex:0]; 
NSString *path = [documentsDirectoryPath stringByAppendingPathComponent:@"myApp.plist"]; 
NSMutableDictionary *plist = [NSDictionary dictionaryWithContentsOfFile: path];

Read and set

NSString *value1 = (NSString *)[plist valueForKey:@"key1"]; 
NSString *value2 = (NSString *)[plist valueForKey:@"key2"];

[plist setValue:@"zaldzbugz" forKey:@"key1"]; 
[plist writeToFile:path atomically:YES];