How can I create a UILabel with strikethrough text?

SWIFT 5 UPDATE CODE

let attributeString: NSMutableAttributedString = NSMutableAttributedString(string: "Your Text")
    attributeString.addAttribute(NSAttributedString.Key.strikethroughStyle, value: 2, range: NSRange(location: 0, length: attributeString.length))

then:

yourLabel.attributedText = attributeString

To make some part of string to strike then provide range

let somePartStringRange = (yourStringHere as NSString).range(of: "Text")
attributeString.addAttribute(NSStrikethroughStyleAttributeName, value: 2, range: somePartStringRange)

Objective-C

In iOS 6.0 > UILabel supports NSAttributedString

NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:@"Your String here"];
[attributeString addAttribute:NSStrikethroughStyleAttributeName
                        value:@2
                        range:NSMakeRange(0, [attributeString length])];

Swift

let attributeString: NSMutableAttributedString =  NSMutableAttributedString(string: "Your String here")
attributeString.addAttribute(NSStrikethroughStyleAttributeName, value: 2, range: NSMakeRange(0, attributeString.length))

Definition :

- (void)addAttribute:(NSString *)name value:(id)value range:(NSRange)aRange

Parameters List:

name : A string specifying the attribute name. Attribute keys can be supplied by another framework or can be custom ones you define. For information about where to find the system-supplied attribute keys, see the overview section in NSAttributedString Class Reference.

value : The attribute value associated with name.

aRange : The range of characters to which the specified attribute/value pair applies.

Then

yourLabel.attributedText = attributeString;

For lesser than iOS 6.0 versions you need 3-rd party component to do this. One of them is TTTAttributedLabel, another is OHAttributedLabel.

In Swift, using the single strikethrough line style:

let attributedText = NSAttributedString(
    string: "Label Text",
    attributes: [.strikethroughStyle: NSUnderlineStyle.single.rawValue]
)
label.attributedText = attributedText

Additional strikethrough styles (Remember to use the .rawValue):

• .none
• .single
• .thick
• .double

Strikethrough patterns (to be OR-ed with the style):

• .patternDot
• .patternDash
• .patternDashDot
• .patternDashDotDot

Specify that the strikethrough should only be applied across words (not spaces):

• .byWord

I prefer NSAttributedString rather than NSMutableAttributedString for this simple case:

NSAttributedString * title =
    [[NSAttributedString alloc] initWithString:@"$198"
                                    attributes:@{NSStrikethroughStyleAttributeName:@(NSUnderlineStyleSingle)}];
[label setAttributedText:title];

Constants for specifying both the NSUnderlineStyleAttributeName and NSStrikethroughStyleAttributeName attributes of an attributed string:

typedef enum : NSInteger {  
  NSUnderlineStyleNone = 0x00,  
  NSUnderlineStyleSingle = 0x01,  
  NSUnderlineStyleThick = 0x02,  
  NSUnderlineStyleDouble = 0x09,  
  NSUnderlinePatternSolid = 0x0000,  
  NSUnderlinePatternDot = 0x0100,  
  NSUnderlinePatternDash = 0x0200,  
  NSUnderlinePatternDashDot = 0x0300,  
  NSUnderlinePatternDashDotDot = 0x0400,  
  NSUnderlineByWord = 0x8000  
} NSUnderlineStyle;