Swift提供了11种键盘类型:

     在开发中，我们可以根据不同的需求，选择不同的键盘样式，例如，当我们只需要输入手机号码时，可以选择纯数字类型的键盘（.NumbersAndPunctuation），当我们需要输入网址时，可以选择URL样式的键盘（.URL），其中，默认的键盘样式（.Default）就是（.NamePhonePad）样式。

我们可以通过输入框的 UIKeyboardType 来设置键盘样式

 UITextField().keyboardType = .NamePhonePad

//

// UIKeyboardType

//

// Requests that a particular keyboard type be displayed when a text widget

// becomes first responder. 

// Note: Some keyboard/input methods types may not support every variant. 

// In such cases, the input method will make a best effort to find a close 

// match to the requested type (e.g. displaying UIKeyboardTypeNumbersAndPunctuation 

// type if UIKeyboardTypeNumberPad is not supported).

//

public enum UIKeyboardType : Int {

    case Default // Default type for the current input method.

    case ASCIICapable // Displays a keyboard which can enter ASCII characters, non-ASCII keyboards remain active

    case NumbersAndPunctuation // Numbers and assorted punctuation.

    case URL // A type optimized for URL entry (shows . / .com prominently).

    case NumberPad // A number pad (0-9). Suitable for PIN entry.

    case PhonePad // A phone pad (1-9, *, 0, #, with letters under the numbers).

    case NamePhonePad // A type optimized for entering a person's name or phone number.

    case EmailAddress // A type optimized for multiple email address entry (shows space @ . prominently).

    @available(iOS 4.1, *)

    case DecimalPad // A number pad with a decimal point.

    @available(iOS 5.0, *)

    case Twitter // A type optimized for twitter text entry (easy access to @ #)

    @available(iOS 7.0, *)

    case WebSearch // A default keyboard type with URL-oriented addition (shows space . prominently).

    public static var Alphabet: UIKeyboardType { get } // Deprecated

}

下面一图像展示区别

Default

NumbersAndPunctuation

URL

NumberPad

PhonePad

EmailAddress

DecimalPad

Twitter

WebSearch