Summary of UIKeyboard keyboard View usage in iOS

1. Keyboard style
The UIKit framework supports eight keyboard styles.

typedef enum {  

    UIKeyboardTypeDefault,                //  Default keyboard: Supports all characters   

    UIKeyboardTypeASCIICapable,           //  support ASCII Default keyboard   

    UIKeyboardTypeNumbersAndPunctuation,  //  Standard phone keyboard, support +*# Such symbols   

    UIKeyboardTypeURL,                    // URL The keyboard, .com Button; Only support URL character   

    UIKeyboardTypeNumberPad,              // The keypad   

    UIKeyboardTypePhonePad,               //  The phone keyboard   

    UIKeyboardTypeNamePhonePad,           //  The phone keyboard also supports the input of a person's name   

    UIKeyboardTypeEmailAddress,           //  A keyboard for entering E-mail addresses   

} UIKeyboardType;  

Usage cases:

textView.keyboardtype = UIKeyboardTypeNumberPad;

2. Keyboard appearance

typedef enum {  

    UIKeyboardAppearanceDefault,    //  Default appearance: light gray   

    UIKeyboardAppearanceAlert,      // Dark grey / Graphite color   

} UIKeyboardAppearance; 

Usage cases:

textView.keyboardAppearance=UIKeyboardAppearanceDefault;

3. The enter key

typedef enum {  

    UIReturnKeyDefault,  // Default: Grey button, marked Return

    UIReturnKeyGo,  // marked Go Blue button 

    UIReturnKeyGoogle,  // marked Google Blue button for search 

    UIReturnKeyJoin,  // marked Join Blue button 

    UIReturnKeyNext,  // marked Next Blue button 

    UIReturnKeyRoute,  // marked Route Blue button 

    UIReturnKeySearch,  // marked Search Blue button 

    UIReturnKeySend,  // marked Send Blue button 

    UIReturnKeyYahoo,  // marked Yahoo! Blue button for search 

    UIReturnKeyDone,  // marked Done Blue button 

    UIReturnKeyEmergencyCall,  // Emergency call button 

} UIReturnKeyType;  

Usage cases:

textView.returnKeyType=UIReturnKeyGo;

4. Automatic capitalization

typedef enum {  

    UITextAutocapitalizationTypeNone, // Not automatically capitalized   

    UITextAutocapitalizationTypeWords, // Capitalize words   

    UITextAutocapitalizationTypeSentences, // The sentence begins with a capital letter   

    UITextAutocapitalizationTypeAllCharacters, // All caps   

} UITextAutocapitalizationType;  

Usage cases:

textField.autocapitalizationType = UITextAutocapitalizationTypeWords;

autocorrect

typedef enum {  

    UITextAutocorrectionTypeDefault,// The default   

    UITextAutocorrectionTypeNo,// Non-Autocorrect   

    UITextAutocorrectionTypeYes,// Automatic correction   

} UITextAutocorrectionType; 

Usage cases:

textField.autocorrectionType = UITextAutocorrectionTypeYes;

6. Secure text input

textView.secureTextEntry=YES;

Turn on secure input for passwords or private data. Autocorrect and cache are disabled.
7. Turn on the keyboard to cover the View
By default, opening the keyboard will obscure view below, causing 1 bit of trouble, but it's not a big problem, we can fix it with a little help.
The first thing to realize is that the keyboard height is fixed, but since IOS 5.0, it doesn't seem to be 216 keyboard height anymore, but never mind, let's just adjust it:
Our approach is to move self.view up 216px as soon as textField(possibly other controls) receives a pop-up keyboard event (let's take iPhone portrait for example).
First we need to set the textField agent, which is the current controller.

textField,delegate=self;

Then we implement the following three delegate methods in the current controller:

- (void)textFieldDidBeginEditing:(UITextField *)textField  

{ // When the touch point textField Internally, this method is called when you start editing. textField Will be first responder   

       NSTimeInterval animationDuration = 0.30f;      

      CGRect frame = self.view.frame;  

      frame.origin.y -=216;  

      frame.size.height +=216;  

      self.view.frame = frame;  

       [UIView beginAnimations:@"ResizeView" context:nil];  

       [UIView setAnimationDuration:animationDuration];  

       self.view.frame = frame;                  

       [UIView commitAnimations];                  

}  

- (BOOL)textFieldShouldReturn:(UITextField *)textField   

{// When the user presses ruturn Focus from textField Remove it and the keyboard will disappear   

        NSTimeInterval animationDuration = 0.30f;  

        CGRect frame = self.view.frame;      

        frame.origin.y +=216;        

        frame.size. height -=216;     

        self.view.frame = frame;  

    //self.view Move back to the original position     

    [UIView beginAnimations:@"ResizeView" context:nil];  

    [UIView setAnimationDuration:animationDuration];  

        self.view.frame = frame;                  

        [UIView commitAnimations];  

        [textField resignFirstResponder];     

}