how to replace object at particular index in nsmutablearray which contains multiple value at each index

Question

My array contain (firstName,lastName, age) at each index. now I want to change age of a person at index 1. please guide how to do it. Here is my code.

  - (void)viewDidLoad {
[super viewDidLoad];
productArray=[[NSMutableArray alloc]init];

PersonDetail *personObj = [[PersonDetail alloc] init];
personObj.firstName = @"Adeem";
personObj.lastName = @"Basraa";
personObj.age = @"5";

[productArray addObject:personObj];
[personObj release];

PersonDetail *personObj = [[PersonDetail alloc] init];
personObj.firstName = @"Ijaz";
personObj.lastName = @"Ahmed";
personObj.age = @"10";

[productArray addObject:personObj];
[personObj release];

PersonDetail *personObj = [[PersonDetail alloc] init];
personObj.firstName = @"Waqas";
personObj.lastName = @"Ahmad";
personObj.age = @"15";
[productArray addObject:personObj];
[personObj release];

}

By using key value you can replace the content at any index of nsmutable array. — Minkle Garg
– Minkle Garg, Commented Apr 18, 2012 at 6:47

giorashc · Accepted Answer · 2012-04-18 06:51:28Z

5

Person *person = (Person *)[myArray objectAtIndex:1];
person.age = 2;

Assuming Person is your custom object stored in the array

answered Apr 18, 2012 at 6:51

giorashc

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3 Comments

justin Over a year ago

creepy - same type. same name. same age :)

giorashc Over a year ago

well you win .. you posted before me :)

justin Over a year ago

actually, you beat me by 1 minute. i'll delete mine =)

Manish Agrawal · Accepted Answer · 2012-04-18 06:51:18Z

4

use this

[arrname replaceObjectAtIndex:1 withObject:[NSNumber numberWithInt:13]];//13 is the age you want to change

answered Apr 18, 2012 at 6:51

Manish Agrawal

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Comments

Crazy Developer · Accepted Answer · 2012-04-18 13:12:09Z

4

You should use NSMutableDictionary to save name,age,phone,address and add this dictionary to your array.

[[arry objectAtIndex:1] setObject:@"value" forKey:@"key"];

Like this you can change value.

edited Apr 18, 2012 at 13:12

user142162

answered Apr 18, 2012 at 6:56

Crazy Developer

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Comments

freelancer · Accepted Answer · 2012-04-18 06:55:15Z

2

try this

   -insertObject:atIndex: or replaceObjectAtIndex:withObject:

answered Apr 18, 2012 at 6:55

freelancer

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Comments

Khalid Usman · Accepted Answer · 2012-04-18 07:03:16Z

Perhaps this will help you.

- (void)viewDidLoad {
[super viewDidLoad];
productArray=[[NSMutableArray alloc]init];

PersonDetail *personObj = [[PersonDetail alloc] init];
personObj.firstName = @"Adeem";
personObj.lastName = @"Basraa";
personObj.phoneNumber = @"123456789";

[productArray addObject:personObj];
[personObj release];

PersonDetail *personObj = [[PersonDetail alloc] init];
personObj.firstName = @"Ijaz";
personObj.lastName = @"Ahmed";
personObj.phoneNumber = @"987654321";

[productArray addObject:personObj];
[personObj release];

PersonDetail *personObj = [[PersonDetail alloc] init];
personObj.firstName = @"Waqas";
personObj.lastName = @"Ahmad";
personObj.phoneNumber = @"45656789";
[productArray addObject:personObj];
[personObj release];
}

- (void)change {

for (int i=0;i<[productArray count];i++) {
          PersonDetail *personObj = (PersonDetail *)[[productArray objectAtIndex:i] retain];
          personObj.phoneNumber = @"New";
    }
}

Dr.Kameleon · Accepted Answer · 2012-04-18 06:51:16Z

1

Supposing your NSMutableArray consists of NSMutableDictionary objects,

try something like this :

NSMutableDictionary* entry = [entries objectAtIndex:index];

[entry setValue:@"newAge" forKey:@"Age"];

answered Apr 18, 2012 at 6:51

Dr.Kameleon

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