Converting NSNumbers saved in a plist to integers - ios

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.