Removing new line characters from NSString

Question

I have a NSString like this:

Hello 
World
of
Twitter
Lets See this
>

I want to transform it to:

Hel

Answer 1

My case also contains \r, including \n, [NSCharacterSet newlineCharacterSet] does not work, instead, by using

htmlContent = [htmlContent stringByReplacingOccurrencesOfString:@"[\r\n]"
                                                     withString:@""
                                                        options:NSRegularExpressionSearch
                                                          range:NSMakeRange(0, htmlContent.length)];

solved my problem.

Btw, \\s will remove all white spaces, which is not expected.

Answer 2

Providing a Swift 3.0 version of @hallski 's answer here:

self.content = self.content.components(separatedBy: CharacterSet.newlines).joined(separator: " ")

Providing a Swift 3.0 version of @Kjuly 's answer here (Note it replaces any number of new lines with just one \n. I would prefer to not use regular express if someone can point me a better way):

self.content = self.content.replacingOccurrences(of: "[\r\\n]+", with: "\n", options: .regularExpression, range: Range(uncheckedBounds: (lower: self.content.startIndex, upper: self.content.endIndex)));

Answer 3

Split the string into components and join them by space:

NSString *newString = [[myString componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]] componentsJoinedByString:@" "];

Answer 4

Splitting the string into components and rejoining them is a very long-winded way to do this. I too use the same method Paul mentioned. You can replace any string occurrences. Further to what Paul said you can replace new line characters with spaces like this:

myString = [myString stringByReplacingOccurrencesOfString:@"\n" withString:@" "];

Answer 5

I'm using

[...]
myString = [myString stringByReplacingOccurrencesOfString:@"\n\n" withString:@"\n"];
[...]

/Paul