Convert NSString to NSInteger?

Question

I want to convert string data to NSInteger.

If you google it you can easily get the answer in the first hit itself — KingofBliss, Jan 25 '11 at 09:32
At what point do abandoned questions like this get "auctioned" off for the community to buy with reputation points.... hmmm :-) — Norman H, May 15 '12 at 13:50
@StephanCelis Before this, it was some other post. Now this ranked up based on most number of views :) — KingofBliss, Nov 06 '12 at 09:39

score 146 · Answer 1 · answered Jan 25 '11 at 08:56

146

If the string is a human readable representation of a number, you can do this:

NSInteger myInt = [myString intValue];

answered Jan 25 '11 at 08:56

Aurum Aquila

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I believe the right side of the expression should be [myString integerValue], no? – Kyle Clegg Nov 02 '12 at 20:56
`[myString intValue]` is a dark side ahaha – Alexander Perechnev Dec 09 '14 at 14:09
4

intValue returns an int, integerValue return an NSInteger. int is always an int type, but NSInteger changes types for the compiled device. There's more on that, but it's recommended to use NSInteger where ever possible. – Michael Ozeryansky Jan 11 '15 at 23:17
2

I'm disappointed. If you do something like `[@"Test" integerValue]` it will return `0` because `Test` is not a number. This is an unsafe way to do this. – eMdOS Sep 19 '17 at 13:11

score 78 · Answer 2 · edited Oct 30 '12 at 11:57

78

[myString intValue] returns a cType "int"

[myString integerValue] returns a NSInteger.

In most cases I do find these simple functions by looking at apples class references, quickest way to get there is click [option] button and double-click on the class declarations (in this case NSString ).

edited Oct 30 '12 at 11:57

Dilip Rajkumar

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answered Jan 25 '11 at 09:48

EtienneSky

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simple and util tip. :) – Douglas Frari Oct 02 '13 at 17:19

score 25 · Answer 3 · answered Dec 23 '13 at 18:06

25

I've found this to be the proper answer.

NSInteger myInt = [someString integerValue];

answered Dec 23 '13 at 18:06

pixelsize

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score 9 · Answer 4 · answered Nov 26 '15 at 09:48

NSNumber *tempVal2=[[[NSNumberFormatter alloc] init] numberFromString:@"your text here"];

returns NULL if string or returns NSNumber

NSInteger intValue=[tempVal2 integerValue];

returns integer of NSNumber

Enrico Cupellini · Answer 5 · 2016-11-24T14:36:16.960

2

this is safer than integerValue:

-(NSInteger)integerFromString:(NSString *)string
{
    NSNumberFormatter *formatter=[[NSNumberFormatter alloc]init];
    [formatter setNumberStyle:NSNumberFormatterDecimalStyle];
    NSNumber *numberObj = [formatter numberFromString:string];
    return [numberObj integerValue];
}

edited Nov 24 '16 at 14:36

answered Nov 24 '16 at 14:12

Enrico Cupellini

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score 1 · Answer 6 · answered Mar 18 '13 at 08:23

1

int myInt = [myString intValue];
NSLog(@"Display Int Value:%i",myInt);

answered Mar 18 '13 at 08:23

Amit Singh

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score -3 · Answer 7 · edited Mar 25 '15 at 11:34

-3

NSString *string = [NSString stringWithFormat:@"%d", theinteger];

edited Mar 25 '15 at 11:34

nhahtdh

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answered Mar 25 '15 at 11:19

Zverusha

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He asked for the reverse of this. – SikoSoft May 15 '15 at 12:59

Convert NSString to NSInteger?

7 Answers7

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