Combined x numbers of attributed strings

Question

I want to ask how to combine x number of attributed string and make a single string.

    NSMutableArray *array = [NSKeyedUnarchiver unarchiveObjectWithData:health.storeArry];
            NSLog(@"%lu",(unsigned long)array.count);
            for (NSDate * str in array) {
                NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
                dateFormatter.timeZone = [NSTimeZone localTimeZone];
                dateFormatter.timeStyle = NSDateFormatterShortStyle;
                NSString * dateTimeString = [dateFormatter stringFromDate:str];

                NSString* str=dateTimeString;
                NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:str];

                [attrString addAttribute: NSFontAttributeName value:  [UIFont fontWithName:@"Helvetica" size:15] range: NSMakeRange(str.length-2,2)];
                NSLog(@"%@",attrString);

                [attrString appendAttributedString:attrString];

}

This is my code. I found ans of two or three attibutedstring cancatenated but I have an array in which x number nsdate objects. I want to concatenate all of them in one string. How can I achieve that? Thanks

Answer 1

Your issue is that you were creating each time a new NSMutableAttributedString. You need to put it outside the for loop.

NSMutableArray *array = [NSKeyedUnarchiver unarchiveObjectWithData:health.storeArry];
NSLog(@"%lu",(unsigned long)array.count);

NSMutableAttributedString *finalAttributedString = [NSMutableAttributedString alloc] init];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.timeZone = [NSTimeZone localTimeZone];
dateFormatter.timeStyle = NSDateFormatterShortStyle;

for (NSDate *str in array) {

    NSString *dateTimeString = [dateFormatter stringFromDate:str];

    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:dateTimeString];

    [attrString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Helvetica" size:15] range:NSMakeRange(str.length-2,2)];
     NSLog(@"%@",attrString);

    [finalAttributedString appendAttributedString:attrString];

}
//Here, you can read the finalAttributedString

Not related tip: You should alloc/init the NSDateFormatter outside the for loop. It's always the same one, and plus alloc/init of NSDateFormatter is consuming.