Question

I am using below code to add strings to NSMutableArray. But the issue I am facing is that whenever I add a new value to the NSMutableArray, previous value gets deleted and new value comes in, so there is always a single value.

I have to save this NSMutableArray to NSUserDefaults so that I would use it on other screens too.

I have searched alot please do help me

code is:

- (IBAction)addChildren:(id)sender {
    inputChildName = nameOfChild.text;
    childArray = [[NSMutableArray alloc] init];
    [self.childArray addObject:inputChildName];
    NSUserDefaults *childrenNamesForLabel = [NSUserDefaults standardUserDefaults];
    [childrenNamesForLabel setObject:childArray forKey:@"children"];
    [childrenNamesForLabel synchronize];
    NSLog(@"CHILDREN ARRAY::: %@", childArray);
}

Answer 1

Because whenever you receive your addChildren action you re-create the childArray which means it will contain 0 objects, then you add one object.

childArray = [[NSMutableArray alloc] init];
[self.childArray addObject:inputChildName];

Move childArray = [[NSMutableArray alloc] init]; to an init or load method and it should work.