componentsSeparatedByString return 1 object when string is empty

Question

I convert string into array by componentsSeparatedByString. It return array perfect. but when string is empty return 1 object.

why this happen ?

NSMutableArray *imagesList=[[[productDetail objectForKey:@"productImage"] componentsSeparatedByString:@","]mutableCopy];

Answer 1

It is because, you are passing empty string("") and componentsSeparatedByString is trying to separate your string by comma(,) but their is no comma(,) in your string so it is returning 1 array item(that is "").

NSMutableArray *imagesList = [[NSMutableArray alloc]init];    
if(![productDetail isEqualToString:@""]) {   
    imagesList=[[[productDetail objectForKey:@"productImage"] componentsSeparatedByString:@","]mutableCopy];
}

Answer 2

If the delimiter is not found in string, the original string is returned in the array.