UIKeyboardTypeNumberPad - 僅顯示iPad上的麻煩？

Question

UIKeyboardTypeNumberPad在iPad上不顯示數字鍵盤。相反，它顯示了UIKeyboardTypeNumbersAndPunctuation鍵盤。

有什麼我很想念，或者這是從iPad操作系統中刪除？

感謝您的指導！

Answer 1

我認爲，這是當前不支持的iPhoneOS 3.2在iPad上

引述UITextInputTraits頭文件：

// 
// 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). 
// 

Answer 2

我知道這個問題已經不活躍了相當長一段時間，但是這可能會幫助那裏的人。

您可以嘗試執行這一個https://github.com/azu/NumericKeypad。編碼器實現了自己的數字鍵盤買子類的UITextField

Answer 3

在頭文件中添加UITextFieldDelegate（h文件）

txtfield_name.keyboardType=UIKeyboardTypeNumbersAndPunctuation; 
txtfield_name.delegate=self; 

再加入此方法

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{ 

NSString *validRegEx =@"^[0-9]*$"; //change this regular expression as your requirement 
NSPredicate *regExPredicate =[NSPredicate predicateWithFormat:@"SELF MATCHES %@", validRegEx]; 
BOOL myStringMatchesRegEx = [regExPredicate evaluateWithObject:string]; 
if (myStringMatchesRegEx) 
     return YES; 
else 
     return NO; 
}