Question

UIKeyboardTypeNumberPad在iPad上不显示数字键盘。相反，它显示UIKeyboardTypeNumbersAndPunctuation键盘。

我是否遗漏了某些东西，或者是否已将其从iPad OS中移除？

感谢您的指导！

Answer 1

我认为iPad上的iPhoneOS 3.2目前不支持此功能

引用UITextInputTraits头文件：

//
// 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

在您的标题文件（.h文件）中添加UITextFieldDelegate

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

然后添加此方法

- (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;
}

Answer 3

我知道这个问题已经暂停了很长一段时间，但这可能会帮助那些人。

您可以尝试实施此https://github.com/azu/NumericKeypad。编码器实现了他自己的数字键盘购买子类化UITextField

UIKeyboardTypeNumberPad - 在iPad上只显示数字？

3 个答案: