Swift - Split string over multiple lines

Question

How could I split a string over multiple lines such as below   var text String    This is some text                    over multiple lines

User · Answer

I tried several ways but found an even better solution  Just use a  Text View  element  It s text shows up multiple lines automatically  Found here  UITextField multiple lines

User · Answer

As pointed out by litso  repeated use of the  -Operator in one expression can lead to XCode Beta hanging  just checked with XCode 6 Beta 5   Xcode 6 Beta not compiling  An alternative for multiline strings for now is to use an array of strings and reduce it with     var text     This is some text                 over multiple lines   reduce          Or  arguably simpler  using join   var text      join   This is some text                         over multiple lines

User · Answer

Multi-line strings are possible as of Swift 4 0  but there are some rules    You need to start and end your strings with three double quotes       Your string content should start on its own line  The terminating     should also start on its own line    Other than that  you re good to go  Here s an example   let longString       When you write a string that spans multiple lines make sure you start its content on a line all of its own  and end it with three quotes also on a line of their own  Multi-line strings also let you write  quote marks  freely inside your strings  which is great        See what s new in Swift 4 for more information

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You can using unicode equals for enter or  n and implement them inside you string  For example   u 0085

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Swift 4 has addressed this issue by giving Multi line string literal support To begin string literal add three double quotes marks             and press return key  After pressing return key start writing strings with any variables   line breaks and double quotes just like you would write in notepad or any text editor  To end multi line string literal again write             in new line   See Below Example       let multiLineStringLiteral           This is one of the best feature add in Swift 4     It let   s you write    Double Quotes    without any escaping     and new lines without need of     n             print multiLineStringLiteral

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One approach is to set the label text to attributedText and update the string variable to include the HTML for line break   lt br   gt     For example   var text String    This is some text lt br   gt over multiple lines  label attributedText   text   Output   This is some text over multiple lines   Hope this helps

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Sample  var yourString    first line  n second line  n third line    In case  you don t find the   operator suitable

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Swift 4 includes support for multi-line string literals  In addition to newlines they can also contain unescaped quotes   var text           This is some text     over multiple lines           Older versions of Swift don t allow you to have a single literal over multiple lines but you can add literals together over multiple lines   var text    This is some text n              over multiple lines n

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I used an extension on String to achieve multiline strings while avoiding the compiler hanging bug  It also allows you to specify a separator so you can use it a bit like Python s join function  extension String       init sep String    lines String              self              for  idx  item  in lines enumerated                 self       item               if idx  lt  lines count-1                   self    sep                                    init   lines String              self              for  idx  item  in lines enumerated                 self       item               if idx  lt  lines count-1                   self      n                                     print      String           Hello            World            Hello World    print      String sep                Hello            World            Hello  World

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Another way if you want to use a string variable with some predefined text   var textFieldData String    John  myTextField text   NSString format   Hello User   n     textFieldData  as String myTextField numberOfLines   0

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Here s a code snippet to split a string by n characters separated over lines       A UIKit based Playground for presenting user interface  import UIKit import PlaygroundSupport  class MyViewController   UIViewController       override func loadView              let str   String charsPerLine  5   Hello World            print str      Hello n Worl nd  n            extension String        init charsPerLine Int    str String            self              var idx   0         for char in str               self       char               idx   idx   1             if idx    charsPerLine                   self      n                  idx   0

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The following example depicts a multi-line continuation  using parenthesis as a simple workaround for the Swift bug as of Xcode 6 2 Beta  where it complains the expression is too complex to resolve in a reasonable amount time  and to consider breaking it down into smaller pieces                         return String format   n                              part1      d n                                 part2      d n                                 part3          n                               part4          n                               part5          n                               part6          n                               part7          n                               part8          n                               part9          n                               part10         n                               part12         n                               part13    f n                                  part14    f n n                       part1  part2  part3  part4  part5  part6  part7  part8                       part9  part10  part11  part12  part13  part14

User · Answer

Adding to  Connor answer  there needs to be  n also  Here is revised code   var text String    This is some text  n                       over multiple lines

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Swift    connor is the right answer  but if you want to add lines in a print statement what you are looking for is  n and or  r  these are called Escape Sequences or Escaped Characters  this is a link to Apple documentation on the topic    Example   print  First line nSecond Line rThirdLine

User · Answer

This was the first disappointing thing about Swift which I noticed  Almost all scripting languages allow for multi-line strings   C  11 added raw string literals which allow you to define your own terminator  C  has its  literals for multi-line strings   Even plain C and thus old-fashioned C   and Objective-C allow for concatentation simply by putting multiple literals adjacent  so quotes are collapsed  Whitespace doesn t count when you do that so you can put them on different lines  but need to add your own newlines    const char  text    This is some text n                      over multiple lines     As swift doesn t know you have put your text over multiple lines  I have to fix connor s sample  similarly to my C sample  explictly stating the newline   var text String    This is some text  n                       over multiple lines

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