Question

在我的iPhone应用程序中，有一个文本字段用于输入用户的电话号码。我已尝试过数字键盘，手机键盘，小数点等。但没有一个是合适的。

如何设置包含“ - ”键的数字键盘？

Answer 1

您可以添加 - 您想要添加的内容，如下面的代码会在文本字段中输入数字时添加brackets (和dash -。

#pragma mark - Phone Number Field Formatting

// Adopted from: http://stackoverflow.com/questions/6052966/phone-number-formatting
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if (textField == self.mobileNumberField) {
        int length = [self getLength:textField.text];
        if(length == 10) {
            if(range.length == 0)
                return NO;
        }
        if(length == 3) {
            NSString *num = [self formatNumber:textField.text];
            textField.text = [NSString stringWithFormat:@"(%@) ",num];
            if(range.length > 0)
                textField.text = [NSString stringWithFormat:@"%@",[num substringToIndex:3]];
        }
        else if(length == 6) {
            NSString *num = [self formatNumber:textField.text];
            textField.text = [NSString stringWithFormat:@"(%@) %@-",[num substringToIndex:3],[num substringFromIndex:3]];
            if(range.length > 0)
                textField.text = [NSString stringWithFormat:@"(%@) %@",[num substringToIndex:3],[num substringFromIndex:3]];
        }
    }
    return YES;
}

-(NSString*)formatNumber:(NSString*)mobileNumber
{
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"+" withString:@""];
    int length = [mobileNumber length];
    if(length > 10) {
        mobileNumber = [mobileNumber substringFromIndex: length-10];
    }
    return mobileNumber;
}


-(int)getLength:(NSString*)mobileNumber
{
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"+" withString:@""];
    int length = [mobileNumber length];
    return length;
}

Taken from here

Answer 2

我认为您可以使用UIKeyboardTypePhonePad并使用inputAccessoryView UITextField属性作为-按钮。

代码：

UIToolbar *punctuationbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
numberToolbar.barStyle = UIBarStyleBlackTranslucent;
numberToolbar.items = [NSArray arrayWithObjects:
                       [[UIBarButtonItem alloc]initWithTitle:@"-" style:UIBarButtonItemStyleBordered target:self action:@selector(addHyphen)],
                       nil];
[numberToolbar sizeToFit];
_yourTextField.inputAccessoryView = punctuationbar;

并添加addHyphen方法，如：

- (void)addHyphen
{
  _yourTextField.text = [_yourTextField.text stringByAppendingString:@"-"];
}

注意：此方法会在文本末尾附加-。您需要修改上述方法。

参考：

<强> inputAccessoryView

文本字段成为时显示的自定义附件视图   第一响应者@property (readwrite, retain) UIView *inputAccessoryView;

<强>讨论

此属性的默认值为nil。为此分配视图   属性使该视图显示在标准系统上方   键盘（或自定义输入视图上方，如果提供一个）时   文本字段成为第一个响应者。例如，你可以使用   此属性用于将自定义工具栏附加到键盘。可用性
Available in iOS 3.2 and later.
在UITextField.h中声明

参考UITextField Class

为电话号码文本字段设置适当的键盘

2 个答案:

代码：

参考：