Objective C delete last NSString in NSMutableArray - ios

Question

I am trying to get the last NSString from a NSMutableArray, and delete it if it's empty.
Here is the code I am using:
- (void)viewWillAppear:(BOOL)animated {
if ([notes.data length]==0){
[storedText removeLastObject];
}
[self.tableView reloadData];
}
data is the NSString and storedText is the NSMutableArray. This code deletes the NSString even if it's not empty. I want it to keep the string if it contains text.

Answer 1

You should try something like this:
- (void)viewWillAppear:(BOOL)animated {
if ([[[storedText lastObject] data] length]==0){
[storedText removeLastObject];
}
[self.tableView reloadData];
}
BTW, it seems that your hypothesis that notes.data is the same string as the last object in storedText is not correct. This leads me to suspect that you have other kinds of errors in your code that you should also investigate. In other words, what you can expect is that your notes.data is not correct -- indeed, you should at least "update" it after you remove the last object from the array:
- (void)viewWillAppear:(BOOL)animated {
if ([[[storedText lastObject] data] length]==0){
[storedText removeLastObject];
notes = [storedText lastObject]; //-- this will be the *new* last object after removal
}
[self.tableView reloadData];
}
but I have no clue what you do with notes.data, so I do not know if this by itself is enough to bring it back to being consistent with your hypothesis.

Answer 2

Ideally before you add any item to storedText you would check that it wasn't nil or an empty string, then you wouldn't have the problem.
Otherwise, get the last item from storedText and check it (using isEqualToString: or a length check) and then remove it if it matches.

Answer 3

Follow what Wain said. Do this.
//total array size
int count = [storedText count];
int lastItemIndexInt = count - 1;
//get last object in array which is a string
NSString *str1 = [storedText objectAtIndex:lastItemIndexInt];
if ([str1 isEqualToString:#""] || [str1 length] < 1)
{
//string is null / blank, remove it
[storedText removeObjectAtIndex:lastItemIndexInt];
}