iOS UITextView和UITextField的键盘处理

本文主要是介绍iOS UITextView和UITextField的键盘处理，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1、设置键盘类型：

self.phoneField.keyboardType = UIKeyboardTypeNumberPad;

typedef NS_ENUM(NSInteger, UIKeyboardType) {UIKeyboardTypeDefault,                // Default type for the current input method.UIKeyboardTypeASCIICapable,           // Displays a keyboard which can enter ASCII characters, non-ASCII keyboards remain activeUIKeyboardTypeNumbersAndPunctuation,  // Numbers and assorted punctuation.UIKeyboardTypeURL,                    // A type optimized for URL entry (shows . / .com prominently).UIKeyboardTypeNumberPad,              // A number pad (0-9). Suitable for PIN entry.UIKeyboardTypePhonePad,               // A phone pad (1-9, *, 0, #, with letters under the numbers).UIKeyboardTypeNamePhonePad,           // A type optimized for entering a person's name or phone number.UIKeyboardTypeEmailAddress,           // A type optimized for multiple email address entry (shows space @ . prominently).UIKeyboardTypeDecimalPad NS_ENUM_AVAILABLE_IOS(4_1),   // A number pad with a decimal point.UIKeyboardTypeTwitter NS_ENUM_AVAILABLE_IOS(5_0),      // A type optimized for twitter text entry (easy access to @ #)UIKeyboardTypeWebSearch NS_ENUM_AVAILABLE_IOS(7_0),    // A default keyboard type with URL-oriented addition (shows space . prominently).UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated};

2.设置键盘返回键类型

self.phoneField.returnKeyType = UIReturnKeyDone;

textField的返回键通常配合使用它的键盘代理方法

-(BOOL)textFieldShouldReturn:(UITextField *)textField

{

    [self.view endEditing:YES];

    return YES;

}

而textView则没有这个代理方法，此时可以在这里处理

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

{

    

    if ([text isEqualToString:@"\n"]){ //判断输入的字是否是回车，即按下return

        //在这里做你响应return键的代码

        [self.view endEditing:YES];

        return NO; //这里返回NO，就代表return键值失效，即页面上按下return，不会出现换行，如果为yes，则输入页面会换行

    }

    return YES;

}

typedef NS_ENUM(NSInteger, UIReturnKeyType) {UIReturnKeyDefault,UIReturnKeyGo,UIReturnKeyGoogle,UIReturnKeyJoin,UIReturnKeyNext,UIReturnKeyRoute,UIReturnKeySearch,UIReturnKeySend,UIReturnKeyYahoo,UIReturnKeyDone,UIReturnKeyEmergencyCall,UIReturnKeyContinue NS_ENUM_AVAILABLE_IOS(9_0),
};

3.键盘尺寸改变的通知

有时候需要根据键盘的高度动态调整view的frame，此时可以用通知

 //订阅通知

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];

UIKIT_EXTERN NSString *const UIKeyboardWillChangeFrameNotification  NS_AVAILABLE_IOS(5_0) __TVOS_PROHIBITED;
UIKIT_EXTERN NSString *const UIKeyboardDidChangeFrameNotification   NS_AVAILABLE_IOS(5_0) __TVOS_PROHIBITED;

//键盘的位置或大小发生改变

- (void)keyboardWillChangeFrame:(NSNotification *)noti

{

    CGFloat duration = [noti.userInfo[@"UIKeyboardAnimationDurationUserInfoKey"] floatValue];

    CGRect frame = [noti.userInfo[@"UIKeyboardFrameEndUserInfoKey"] CGRectValue];

    CGFloat offsetY = frame.origin.y - self.view.frame.size.height;

    

    [UIView animateWithDuration:duration animations:^{

        self.view.transform = CGAffineTransformMakeTranslation(0, offsetY);

    }];

    

    

}

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