CODEWITHSUNDEEP
iosobjective-cnsmutablearraynsmutabledictionary
TheTravloper
TheTravloper

Reputation: 246

Store data in NSMutable Array on button click

I want to store data in key value pair in NSMutableDictionary and Store that dictionary in NSArray on everytime the button clicks.

Problem - New data replaces the old one in that array

Code - 

- (void)viewDidLoad {
    [super viewDidLoad];

    _filledDict = [[NSMutableDictionary alloc] init];
    _addedArray = [[NSMutableArray alloc] init];

}

- (IBAction)addMoreClicked:(UIButton *)sender {

   NSString *availableTo = [to stringByReplacingOccurrencesOfString:@"" withString:@""];

   NSString *from = [[_tfDateFrom.text stringByAppendingString:@" "] stringByAppendingString:_tfTimeFrom.text];

  [_filledDict setObject:availableFrom forKey:@"fromDate"];
  [_filledDict setObject:availableTo forKey:@"toDate"];

  [_addedArray addObject:_filledDict]; 

  _tfDateFrom.text = @"";
  _tfDateTo.text = @"";
  _tfTimeFrom.text = @"";
  _tfTimeTo.text = @"";

}

Result I am getting -

<__NSArrayM 0x60000045d6d0>(
{
    fromDate = "2018-08-10 11:16:37";
    toDate = "2018-08-10 11:16:39";
},
{
    fromDate = "2018-08-10 11:16:37";
    toDate = "2018-08-10 11:16:39";
}
)

Upvotes: 1

Views: 41

Answers (2)

Rakesh Patel
Rakesh Patel

Reputation: 1701

You are not initializing dicionary every time so it happens. Please find the below code.

  - (IBAction)addMoreClicked:(UIButton *)sender {

   NSString *availableTo = [to stringByReplacingOccurrencesOfString:@"" withString:@""];

   NSString *from = [[_tfDateFrom.text stringByAppendingString:@" "] stringByAppendingString:_tfTimeFrom.text];
  _filledDict = [[NSMutableDictionary alloc] init];
  [_filledDict setObject:availableFrom forKey:@"fromDate"];
  [_filledDict setObject:availableTo forKey:@"toDate"];

  [_addedArray addObject:_filledDict]; 

  _tfDateFrom.text = @"";
  _tfDateTo.text = @"";
  _tfTimeFrom.text = @"";
  _tfTimeTo.text = @"";

}

Upvotes: 0

Quoc Nguyen
Quoc Nguyen

Reputation: 3007

Because of NSMutableDictionary and NSMutableArray is reference type, so when you update the data of _filledDict, it will update in the object, that you added to NSMutableArray too.

You can simple change _filledDict to the function's scope variable to fix it

- (void)viewDidLoad {
    [super viewDidLoad];

    // Remove it
    // _filledDict = [[NSMutableDictionary alloc] init];
    _addedArray = [[NSMutableArray alloc] init];

}

- (IBAction)addMoreClicked:(UIButton *)sender {

  // Change to
  NSMutableDictionary *filledDict = [[NSMutableDictionary alloc] init];
  [filledDict setObject:availableFrom forKey:@"fromDate"];
  [filledDict setObject:availableTo forKey:@"toDate"];

  [_addedArray addObject:filledDict]; 

}

Upvotes: 1

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