Problem retrieving data from array iphone?

Question

I declared a nsmutablearray and assign some object but when retrieving object it gives memory location.Here is the code.

NSMutableArray *arrCondiNum = [[NSMutableArray alloc] init];
[arrCondiNum addObject:@"2"];
[arrCondiNum addObject:@"4"];
[arrCondiNum addObject:@"6"];
[arrCondiNum addObject:@"8"];
for(int i = 0;i<[arrCondiNum count];i++){
    NSLog(@"Array number %d",[arrCondiNum objectAtIndex:i]);
}

Output it gives
Array number 20820
Array number 20836
Array number 20852
Array number 20868

Benoît · Accepted Answer · 2010-11-16 10:36:48Z

3

You add string in your array, then to display it, you have to use %@:

NSLog(@"Array number %@",[arrCondiNum objectAtIndex:i]);

In your code (%d), you display the address of the object.

%@ will display the description of the ObjC object (return of -descriptionWithLocale: or -description)

edited Nov 16, 2010 at 10:36

answered Nov 16, 2010 at 10:00

Benoît

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Georg Fritzsche · Accepted Answer · 2010-11-16 11:10:09Z

2

Note that in case you want an array of numbers, use NSNumber instead:

[array addObject:[NSNumber numberWithInt:1]];

You still have to use the %@ format specifier though (as NSNumber is a class-type) or retrieve the integer value using -intValue.

answered Nov 16, 2010 at 11:10

Georg Fritzsche

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Toastor · Accepted Answer · 2010-11-16 10:05:27Z

0

Try [[arrCondiNum objectAtIndex:i] floatValue] instead. NSArrays are keeping objects (pointers to objects to be more precise), not values. So the array will return the string object you created earlier. By sending this object the "floatValue" message, it will return its content represented as float value. You could use intValue as well to receive an integer.

answered Nov 16, 2010 at 10:05

Toastor

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1 Comment

Georg Fritzsche Over a year ago

For %d the float value is not useful, it should definitely be -intValue.

success · Accepted Answer · 2012-04-24 13:12:17Z

0

just write like this.. NSLog(@"Array number %@",[arrCondiNum objectAtIndex:i]); u have to print some text..so

answered Apr 24, 2012 at 13:12

success

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