UIKeyboardTypeNumberPad-在iPad上只显示数字?

我相信目前iphoneos3.2在iPad上并不支持这一点

引用uitraits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).
//

添加 UITextFieldDelegate 在头文件(.h文件)中

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;
}

我知道这个问题已经有很长一段时间没用了,但这可能会对其他人有所帮助。

你可以尝试实现这个 https://github.com/azu/NumericKeypad