為什麼使用不同的輸入類型？

鍵盤輸入的類型幫助我們從用戶獲取必需的輸入。

它移除不需要的鍵，並包括所需的部分。用戶可以通過使用 UITextField 的鍵盤屬性設置輸入的類型。

  • 如：文本字段（ textField）。  keyboardType = UIKeyboardTypeDefault

鍵盤輸入類型

輸入的類型 描述
UIKeyboardTypeASCIICapable 鍵盤包括所有標準的 ASCII 字元。
UIKeyboardTypeNumbersAndPunctuation 鍵盤顯示數字和標點。
UIKeyboardTypeURL 鍵盤的 URL 項優化。
UIKeyboardTypeNumberPad 鍵盤用於 PIN 輸入和顯示一個數字鍵盤。
UIKeyboardTypePhonePad 鍵盤對輸入電話號碼進行了優化。
UIKeyboardTypeNamePhonePad 鍵盤用於輸入姓名或電話號碼。
UIKeyboardTypeEmailAddress 鍵盤對輸入電子郵件地址的優化。
UIKeyboardTypeDecimalPad 鍵盤用來輸入十進位數字。
UIKeyboardTypeTwitter 鍵盤對 twitter @ 和 # 符號進行了優化。

添加自定義方法 addTextFieldWithDifferentKeyboard

-(void) addTextFieldWithDifferentKeyboard{

   UITextField *textField1= [[UITextField alloc]initWithFrame:
   CGRectMake(20, 50, 280, 30)];
   textField1.delegate = self;
   textField1.borderStyle = UITextBorderStyleRoundedRect;
   textField1.placeholder = @"Default Keyboard";
   [self.view addSubview:textField1];

   UITextField *textField2 = [[UITextField alloc]initWithFrame:
   CGRectMake(20, 100, 280, 30)];
   textField2.delegate = self;
   textField2.borderStyle = UITextBorderStyleRoundedRect;
   textField2.keyboardType = UIKeyboardTypeASCIICapable;
   textField2.placeholder = @"ASCII keyboard";
   [self.view addSubview:textField2];

   UITextField *textField3 = [[UITextField alloc]initWithFrame:
   CGRectMake(20, 150, 280, 30)];
   textField3.delegate = self;
   textField3.borderStyle = UITextBorderStyleRoundedRect;
   textField3.keyboardType = UIKeyboardTypePhonePad;
   textField3.placeholder = @"Phone pad keyboard";
   [self.view addSubview:textField3];

   UITextField *textField4 = [[UITextField alloc]initWithFrame:
   CGRectMake(20, 200, 280, 30)];
   textField4.delegate = self;
   textField4.borderStyle = UITextBorderStyleRoundedRect;
   textField4.keyboardType = UIKeyboardTypeDecimalPad;
   textField4.placeholder = @"Decimal pad keyboard";
   [self.view addSubview:textField4];

   UITextField *textField5= [[UITextField alloc]initWithFrame:
   CGRectMake(20, 250, 280, 30)];
   textField5.delegate = self;
   textField5.borderStyle = UITextBorderStyleRoundedRect;
   textField5.keyboardType = UIKeyboardTypeEmailAddress;
   textField5.placeholder = @"Email keyboard";
   [self.view addSubview:textField5];

   UITextField *textField6= [[UITextField alloc]initWithFrame:
   CGRectMake(20, 300, 280, 30)];
   textField6.delegate = self;
   textField6.borderStyle = UITextBorderStyleRoundedRect;
   textField6.keyboardType = UIKeyboardTypeURL;
   textField6.placeholder = @"URL keyboard";
   [self.view addSubview:textField6];
}

在 ViewController.m 中更新 viewDidLoad，如下所示

(void)viewDidLoad
{
   [super viewDidLoad];
   //The custom method to create textfield with different keyboard input
   [self addTextFieldWithDifferentKeyboard];
   //Do any additional setup after loading the view, typically from a nib
}

輸出

現在當我們運行應用程式時我們就會得到下麵的輸出:

input_types_text_fields

選擇不同的文本區域我們將看到不同的鍵盤。