CODEWITHSUNDEEP
iphonensstringplist
Jonathan Sterling
Jonathan Sterling

Reputation: 18385

NSString: newline escape in plist

I'm writing a property list to be in the resources bundle of my application. An NSString object in the plist needs to have line-breaks in it. I tried \n, but that doesn't work. What do I do to have newlines in my string in the plist?

Thanks.

Upvotes: 54

Views: 19338

Answers (5)

sakumatto
sakumatto

Reputation: 157

This is how I do loading my plist in Swift 2.0:

plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>STRING_TEXT</key>
    <string>This string contains an emoji and a double underscore😎!__The double undescore is converted when the plist item is read.</string>
</dict>
</plist>

Swift 2.0:

import Foundation

var stringTextRaw = plistValueForString(keyname:"STRING_TEXT")
var stringText = stringTextRaw.stringByReplacingOccurrencesOfString("__", withString: "\r")



func plistValueForString(keyname keyname:String) -> String {

  let filePath = NSBundle.mainBundle().pathForResource("StringsToUse", ofType:"plist")
  let plist = NSDictionary(contentsOfFile:filePath!)

  let value:String = plist?.objectForKey(keyname) as! String
  return value
}

So I first get the stored plist value into the xxRaw variable and then search for __ "double undescore" and replace that with "\r" ie carriage return for a newline and this is placed into the final variable.

Upvotes: 0

Mihai Damian
Mihai Damian

Reputation: 11432

I found a simpler solution:

NSString *newString = [oldString stringByReplacingOccurrencesOfString:@"\\n" withString:@"\n"];

It seems the string reader escapes all characters that need to be escaped such that the text from the plist is rendered verbatim. This code effectively drops the extra escape.

Upvotes: 37

justAfix
justAfix

Reputation: 41

a little late, but i discovered the same issue and i also discovered a fix or workaround. so for anyone who stumbles on this will get an answer :)

so the problem is when you read a string from a file, \n will be 2 characters unlike in xcode the compiler will recognize \n as one.

so i extended the NSString class like this:

"NSString+newLineToString.h":

@interface NSString(newLineToString)    
-(NSString*)newLineToString;   
@end

"NSString+newLineToString.m":

#import "NSString+newLineToString.h"

@implementation NSString(newLineToString)

-(NSString*)newLineToString
{
    NSString *string = @"";
    NSArray *chunks = [self componentsSeparatedByString: @"\\n"];

    for(id str in chunks){
        if([string isEqualToString:@""]){
            string = [NSString stringWithFormat:@"%@",str];
        }else{
            string = [NSString stringWithFormat:@"%@\n%@",string,str];
        }

    }
    return string;
} 
@end

How to use it:

rootDict = [[NSDictionary alloc]initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"yourFile" ofType:@"plist"]];

NSString *string = [[rootDict objectForKey:@"myString"] newLineToString];

its quick and dirty, be aware that \\n in your file will not be recognize as \n so if you need to write \n on text you have to modify the method :)

Upvotes: 4

Dave Addey
Dave Addey

Reputation: 1366

If you're editing the plist in Xcode's inbuild plist editor, you can press option-return to enter a line break within a string value.

Upvotes: 123

Jon Reid
Jon Reid

Reputation: 20980

Edit your plist using a text editor instead of Xcode's plist editor. Then you simply put line breaks in your strings directly:

<string>foo
bar</string>

Upvotes: 24

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