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    <p>I took Mike's work and turn it into a category for NSMutableString and NSString</p> <p><strong>Make a Category for NSMutableString with:</strong></p> <pre><code>- (NSMutableString *)xmlSimpleUnescape { [self replaceOccurrencesOfString:@"&amp;amp;" withString:@"&amp;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;quot;" withString:@"\"" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;#x27;" withString:@"'" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;#39;" withString:@"'" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;#x92;" withString:@"'" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;#x96;" withString:@"-" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;gt;" withString:@"&gt;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&amp;lt;" withString:@"&lt;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; return self; } - (NSMutableString *)xmlSimpleEscape { [self replaceOccurrencesOfString:@"&amp;" withString:@"&amp;amp;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"\"" withString:@"&amp;quot;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"'" withString:@"&amp;#x27;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&gt;" withString:@"&amp;gt;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; [self replaceOccurrencesOfString:@"&lt;" withString:@"&amp;lt;" options:NSLiteralSearch range:NSMakeRange(0, [self length])]; return self; } </code></pre> <p><strong>Make a Category for NSString with:</strong></p> <pre><code>- (NSString *)xmlSimpleUnescapeString { NSMutableString *unescapeStr = [NSMutableString stringWithString:self]; return [unescapeStr xmlSimpleUnescape]; } - (NSString *)xmlSimpleEscapeString { NSMutableString *escapeStr = [NSMutableString stringWithString:self]; return [escapeStr xmlSimpleEscape]; } </code></pre> <p><strong>* A Swift 2.0 Version *</strong></p> <p>The Objective-C version is a little more efficient as it does mutable operations on the string. However, this is a swift way to do simple escaping:</p> <pre><code>extension String { typealias SimpleToFromRepalceList = [(fromSubString:String,toSubString:String)] // See http://stackoverflow.com/questions/24200888/any-way-to-replace-characters-on-swift-string // func simpleReplace( mapList:SimpleToFromRepalceList ) -&gt; String { var string = self for (fromStr, toStr) in mapList { let separatedList = string.componentsSeparatedByString(fromStr) if separatedList.count &gt; 1 { string = separatedList.joinWithSeparator(toStr) } } return string } func xmlSimpleUnescape() -&gt; String { let mapList : SimpleToFromRepalceList = [ ("&amp;amp;", "&amp;"), ("&amp;quot;", "\""), ("&amp;#x27;", "'"), ("&amp;#39;", "'"), ("&amp;#x92;", "'"), ("&amp;#x96;", "-"), ("&amp;gt;", "&gt;"), ("&amp;lt;", "&lt;")] return self.simpleReplace(mapList) } func xmlSimpleEscape() -&gt; String { let mapList : SimpleToFromRepalceList = [ ("&amp;", "&amp;amp;"), ("\"", "&amp;quot;"), ("'", "&amp;#x27;"), ("&gt;", "&amp;gt;"), ("&lt;", "&amp;lt;")] return self.simpleReplace(mapList) } } </code></pre> <p>I could have used the NSString bridging capabilities to write something very similar to the NSString version, but I decided to do it more swifty.</p>
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