CODEWITHSUNDEEP
objective-cnsstring
neel
neel

Reputation: 209

How can I generate a comma-separated string in Objective-C?

I am trying to create comma separated string. e.g. abc,pqr,xyz
I am parsing the xml and want to generate the comma separated string of the values of nodes in xml.

I am doing the following:

if([elementName isEqualToString:@"Column"])
      NSString *strTableColumn = [attributeDict objectForKey:@"value"];

I am getting different nodes value in strTableColumn while parsing and want to generate comma separated of this. Please help.

Upvotes: 2

Views: 13893

Answers (5)

zoom8amit
zoom8amit

Reputation: 332

First thought can be that you parse the data and append commas using the NSString append methods. But that can have extra checks. So better solution is to

Parse data -> Store into array -> Add comma separators -> Finally store in string

// Parse data -> Store into array
NSMutableArray *arrayOfColumns = [[NSMutableArray alloc] init];
if([elementName isEqualToString:@"Column"]){
   [arrayOfColumns addObject:[attributeDict objectForKey:@"value"]];
}
// Add comma separators -> Finally store in string
NSString *strTableColumn = [arrayOfColumns componentsJoinedByString:@","];

Upvotes: 0

D-eptdeveloper
D-eptdeveloper

Reputation: 2430

This method will return you the nsmutablestring with comma separated values from an array

-(NSMutableString *)strMutableFromArray:(NSMutableArray *)arr withSeperater:(NSString *)saperator 
{ 
    NSMutableString *strResult = [NSMutableString string];

    for (int j=0; j<[arr count]; j++)
{
    NSString *strBar = [arr objectAtIndex:j];
    [strResult appendString:[NSString stringWithFormat:@"%@",strBar]];
    if (j != [arr count]-1)
    {
        [strResult appendString:[NSString stringWithFormat:@"%@",seperator]];
    }
}
return strResult;
}

Upvotes: 0

XJones
XJones

Reputation: 21967

I would do to it like this. Before you start your XML processing, create a mutable array to hold each "Column" value (probably want this to be an iVar in your parser class):

NSMutableArray *columns = [[NSMutableArray alloc] init];

Then parse the XML, adding each string to the array:

if([elementName isEqualToString:@"Column"]) {
    [columns addObject:[attributeDict objectForKey:@"value"]];
}

When you're done, create the comma-separated string and release the array:

NSString *strTableColumn = [columns componentsJoinedByString:@","];
[columns release];
columns = nil;

Upvotes: 23

Hiren
Hiren

Reputation: 12780

You can use the following code:

NSString *timeCreated = elementName;  
NSArray *timeArray = [timeCreated componentsSeparatedByString:@","];        
NSString *t = [timeArray objectAtIndex:0];  
NSString *t1 = [timeArray objectAtindex:1];

Then append one by one string.

Upvotes: 4

Xiao
Xiao

Reputation: 883

use NSMutableString

then you can use 

[yourMutableString appendString:@","];//there is a comma
[yourMutableString appendString:someOtherString];

in this way your strings are separated by comma

Upvotes: 1

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