> For the complete documentation index, see [llms.txt](https://docs.verygoodsecurity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verygoodsecurity.com/vault/developer-tools/vgs-show/ios-sdk/samples.md).

# Samples

### VGS Show iOS SDK Samples

Check samples and code examples how to use VGS Show SDK features.

### Text Formatting in VGSLabel

You have an option to transform the revealed text with specified pattern in `addTransformationRegex(_:)` function.

#### Code example

```swift
/// Option 1. Card Number formatting
// Create regex object, split card number to XXXX XXXX XXXX XXXX format.
let cardNumberPattern = "(\\d{4})(\\d{4})(\\d{4})(\\d{4})"
let template = "$1 $2 $3 $4"

// Use force try! here for sample.
let regex = try! NSRegularExpression(pattern: cardNumberPattern, options: [])

// Add transformation regex and template to your label.
cardNumberLabel.addTransformationRegex(regex, template: template)

/// Option 2. Social Security Number formatting
// Create regex object, split SSN to XXX-XX-XXXX format.
let ssnPattern = "(\\d{3})(\\d{2})(\\d{4})"
let template = "$1 $2 $3"

// Use force try! here for sample.
let regex = try! NSRegularExpression(pattern: ssnPattern, options: [])

// Add transformation regex and template to your label.
ssnLabel.addTransformationRegex(regex, template: template)
```

### Secure text in VGSLabel

You can hide revealed text with `secureTextSymbol` fully or partially. Check the code examples how to add an option for your users to show/hide revealed data.

#### Code example

```swift
// Revealed Data
4111111111111111

// Displayed string in VGSLabel after modification with transformation regex
4111-1111-1111-1111

// Option 1. Secure all text in VGSLabel
label.isSecureText = true // => "*******************"

// Option 2. Change secure symbol
label.secureTextSymbol = "x" // => "xxxxxxxxxxxxxxxxxxx"

// Option 3. Secure text from 4th character
label.setSecureText(start: 4) // => "4111xxxxxxxxxxxxxxx"

// Option 4. Secure text till 15th character
label.setSecureText(end: 14) // => "xxxxxxxxxxxxxxx1111"

// Option 5. Secure text from 4th till 14th characters
label.setSecureText(start: 4, end: 14) // => "4111xxxxxxxxxxx1111"

// Option 6. Secure text in ranges [5,8] & [10, 13]
let range1 = VGSTextRange(start: 5, end: 8)
let range2 = VGSTextRange(start: 10, end: 13)
label.setSecureText(ranges: [range1, range2]) // => "4111-xxxx-xxxx-1111"
```


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