Question

I have a text field In that user can enter values from 1-10

at the bottom of the text field i have button.

i need to add the values in text filed to array when user clicks done button

for this i wrote code like this.

- (void)viewDidLoad
{
    [super viewDidLoad];
    PainlevelsArray = [[NSMutableArray alloc] init]; //PainlevelsArray declared in .h

}


-(IBAction)doneClick:(id)sender
{
    [PainlevelsArray addObject:txtField.text ];

    // [PainlevelsArray insertObject:rateLabel.text atIndex:0 ];
    NSLog(@"PainlevelsArray *** %@",PainlevelsArray);

   [self.navigationController popToRootViewControllerAnimated:YES];

}

But every time array displays only the recently added one value only in log when button clicks, like this

Output on Console

========================

2012-05-07 10:11:15.689 ESPT[796:10d03] PainlevelsArray *** (
    2
)
2012-05-07 10:11:27.984 ESPT[796:10d03] PainlevelsArray *** (
    4
)

My array gets empty every time view loads, and adde a fresh entry when button clicks
But i need like this

2012-05-07 10:11:27.984 ESPT[796:10d03] PainlevelsArray *** (
        4,
        5,
        2,
        6,
        8,
    )

All the velues enters are adde/inserted to the existing array.

Thanks in advance

in ExerciseStartViewController

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 ExerciseResult *result = [[ExerciseResult alloc] init];
            [self.navigationController pushViewController:result animated:YES];
            [result release];
    }

in current/ ExerciseResult viewcontroller

- (void)viewDidLoad
{
    [super viewDidLoad];
    PainlevelsArray = [[NSMutableArray alloc] init]; //PainlevelsArray declared in .h

}


-(IBAction)doneClick:(id)sender
{
    [PainlevelsArray addObject:txtField.text ];

    // [PainlevelsArray insertObject:rateLabel.text atIndex:0 ];
    NSLog(@"PainlevelsArray *** %@",PainlevelsArray);

   [self.navigationController popToRootViewControllerAnimated:YES];

}

Answer 1

You need to use a global array.

Best possible solution is declare an array in AppDelegate.h file and alloc-init this array in applicationdidfinishlaunch method.

AppDelegate *app =  (AppDelegate*)[[UIApplication sharedApplication] delegate];
[app.arrMutable addObject:textField.text ]; 

Use UserDefaults: These are used to save your application data in key-value format. The values/objects stored as userdefaults always remain in application, until you have not removed it from sandbox. You can use following code to store an array in userdefaults.

[[NSUserDefaults standardUserDefaults] setObject:app.arrMutable forKey:@"Global_Array_Key"];

In AppDelegae applicationDidFinishLuanch method you can retrieve this array from userdefaults using:

self.arrMutable = [[NSMutableArray alloc]initWithArray:[[NSUserDefaults standardUserDefaults]objectForKey:@"Global_Array_Key"]];