NSString replace repeated newlines with single newline

Question

I have an `NSString` which can have multiple 
 in between the string. I need to replace the multiple occurrence of 
's with a single 
. I tried this code: ``` newString = [string stringByReplacingOccurrencesOfString:@"

" withString:@"
"]; ``` But this does not give the desired result if a series of "

" is encountered in the string. In this case, they will be replaced with "

". What should I do so that all more than one "
"s be replaced with single "
"? Thanks to all! Update: Adding a screenshot for `UITextView` to which the filtered string is set as text. The new lines seem to be more than one after writing code as suggested by Attila H in answer.

Accepted Answer

You might use NSRegularExpression. This is the most simple and elegant way:

```
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"
+" options:0 error:NULL];
NSString *newString = [regex stringByReplacingMatchesInString:string options:0 range:NSMakeRange(0, [string length]) withTemplate:@"
"];
```

NSString replace repeated newlines with single newline

Solution

Problem