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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