Converting NSNumbers saved in a plist to integers

Question

Saving data:

- (NSString *)dataFilePath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return [documentsDirectory stringByAppendingPathComponent:kFilename];
}
- (void)applicationWillTerminate:(NSNotification *)notification
{
NSMutableArray *array = [[NSMutableArray alloc] init];

NSNumber *number = [NSNumber numberWithInt:points];
  [array addObject:number];

  [array writeToFile:[self dataFilePath] atomically:YES];
  [array release];
}

Reading data: BestLabel.text will display the high score. I get a warning: "assignment makes integer from pointer without a cast"

-(void)LoadData{
BestLabel.center = CGPointMake(150,300);

NSString *filePath = [self dataFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
 NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
 loadint = [array objectAtIndex:0];
 NSString *myString35 = [NSString stringWithFormat:@"%d", loadint]; 
 BestLabel.text = myString35;
 [array release];
}
}

The sample code I got this from was saving and loading text fields with no problem.. I suppose I could do a string to int conversion, but that seems unnecessary. Thanks for your help!

EDIT:

- (void)applicationWillTerminate:(NSNotification *)notification

{ NSMutableArray *array = [[NSMutableArray alloc] init];

if (points > highscore){

 NSString *myString35 = [NSString stringWithFormat:@"%d", points];
 [array addObject:myString35];
}else {
 NSString *myString35 = [NSString stringWithFormat:@"%d", highscore];
 [array addObject:myString35];
}


NSNumber *number = [NSNumber numberWithInt:GreenBlot.center.x];
[array addObject:number];
NSNumber *number2 = [NSNumber numberWithInt:GreenBlot.center.y];
[array addObject:number2];

And now loading with:

NSString *filePath = [self dataFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
 NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
 BestLabel.text = [array objectAtIndex:0];
 highscore = [[array objectAtIndex:0] intValue];


 lx = [[array objectAtIndex:1] intValue];
 ly = [[array objectAtIndex:2] intValue];
 GreenBlot.center = CGPointMake( lx,ly);


 [array release];
}

lx and ly are integers. I tried CGPointMake( [[array objectAtIndex:1] intValue], [[array objectAtIndex:2] intValue] ) first. Same results, GreenBlot is getting centered at 0,0. Any idea why?

Answer 1

The easiest thing to do is use NSNumber's intValue method:

loadint = [[array objectAtIndex:0] intValue];

Answer 2

You need the second line below:

loadint = [array objectAtIndex:0];
int score = [loadint intValue];
NSString *myString35 = [NSString stringWithFormat:@"%d", loadint];

If you are only saving one value, then use a NSDictionary with a key that makes it easier for you to label the value you are saving.

Answer 3

CGPointMake is defined:

CGPoint CGPointMake(
    float x,
    float y
)

You are taking GreenBlot.center.x which is presumably a float and feeding it to NSNumber as an int.... Go back and look at the types of your variables and change to [NSNumber numberWithFloat:...] and lx = [[array objectAtIndex:1] floatValue]; etc., as appropriate.

Also, you've created a different question in your editing of the original question.

Answer 4

OP here, (other computer's net is down, dont remember the open id used). Mahboudz: Thanks, I was trying to use integers with floats. Another problem has arisen.. if I quit my application with the home button, trying to load the data returns 0.. but if I rapidly tap the home button, the data will save correctly - I know because the next time I run the application, the GreenBlot.center is set appropriately. Any idea on why this is? Tried putting my saving code in the start of the dealloc method, but that never worked.

Answer 5

Please tell me that i am saving only one integer value into Plist.I have a counter in a function that increments when a function calls.so i want to save that value in plist and increment that value again and again in Plist.

so Please Help.