如何在 iOS 中针对不同的区域代码实时格式化 phone 数字（使用 UITextfield 时）？

Question

我找到了“NBAsYouTypeFormatter”并参考了提供的演示。但是，当用户在 UITextField 中输入 phone 数字时，我希望动态格式化 phone 数字。

请记住，在我的案例中，区域代码并不固定为一个或两个国家，例如仅@"US" 或仅其他。区域代码将由用户从下拉列表中选择，所选代码将由我通过以下行传递：

NBAsYouTypeFormatter *asYouTypeFormatter = [[NBAsYouTypeFormatter alloc] initWithRegionCode:@"US"];  // may be any other than 'US'
NSString *output = [asYouTypeFormatter inputString:@"9999988888"];

现在，当用户在数字文本字段中键入时，我如何能够动态地格式化数字文本字段？

Answer 1

在 UITextField 委托的方法中

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSString *totalString = [NSString stringWithFormat:@"%@%@",textField.text,string];

    if (range.length == 1)
    {
        // Delete button was hit.. so tell the method to delete the last char.
        NSError *error = nil;
        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[\s-\(\)]" options:NSRegularExpressionCaseInsensitive error:&error];
        totalString = [regex stringByReplacingMatchesInString:totalString options:0 range:NSMakeRange(0, [totalString length]) withTemplate:@""];
        totalString = [totalString substringToIndex:[totalString length] - 1];
    }

    textField.text = [Utility formatPhoneNumber:totalString countryCode:@"theCountryCode"];

    return NO;
}

此函数将根据提供的国家/地区代码将您的字符串格式化为 phone 格式数字。

+ (NSString *)formatPhoneNumber:(NSString *)simpleNumber countryCode:(NSString *)countryCode
{
    if (simpleNumber.length == 0)
    {
        return @"";
    }

    NSInteger maxLen = 15;

    // use regex to remove non-digits(including spaces) so we are left with just the numbers
    NSError *error = nil;
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[^[0-9+]]" options:NSRegularExpressionCaseInsensitive error:&error];
    simpleNumber = [regex stringByReplacingMatchesInString:simpleNumber options:0 range:NSMakeRange(0, [simpleNumber length]) withTemplate:@""];

    // check if the number is to long
    if (simpleNumber.length > maxLen)
    {
        // remove last extra chars.
        simpleNumber = [simpleNumber substringToIndex:maxLen];
    }

    NSString *firstChar = @"";
    BOOL countryCodeLen = countryCode.length;

    if (simpleNumber.length > 0)
    {
        firstChar = [simpleNumber substringToIndex:1];
    }

    if ([firstChar isEqualToString:@"+"])
    {
        //+1 (234)
        if (simpleNumber.length < 5 + countryCodeLen)
        {
            NSString *string = [NSString stringWithFormat:@"(\d{%d})(\d+)",countryCodeLen];
            //            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:@"(\d{1})(\d+)"
            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:string
                                                                   withString:@" ()"
                                                                      options:NSRegularExpressionSearch
                                                                        range:NSMakeRange(0, [simpleNumber length])];
        }
        //+1 (234) 567
        else if(simpleNumber.length < 8 + countryCodeLen)
        {
            NSString *string = [NSString stringWithFormat:@"(\d{%d})(\d{3})(\d+)",countryCodeLen];
            //            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:@"(\d{1})(\d{3})(\d+)"
            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:string
                                                                   withString:@" () "
                                                                      options:NSRegularExpressionSearch
                                                                        range:NSMakeRange(0, [simpleNumber length])];
        }
        //+1 (234) 567-
        else   // else do this one..
        {
            NSString *string = [NSString stringWithFormat:@"(\d{%d})(\d{3})(\d{3})(\d+)",countryCodeLen];
            //            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:@"(\d{1})(\d{3})(\d{3})(\d+)"
            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:string
                                                                   withString:@" () -"
                                                                      options:NSRegularExpressionSearch
                                                                        range:NSMakeRange(0, [simpleNumber length])];
        }
    }
    else
    {
        // 123 456 7890
        // format the number.. if it's less then 7 digits.. then use this regex.
        if (simpleNumber.length < 7)
        {
            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:@"(\d{3})(\d+)"
                                                                   withString:@"() "
                                                                      options:NSRegularExpressionSearch
                                                                        range:NSMakeRange(0, [simpleNumber length])];
        }
        else   // else do this one..
        {
            simpleNumber = [simpleNumber stringByReplacingOccurrencesOfString:@"(\d{3})(\d{3})(\d+)"
                                                                   withString:@"() -"
                                                                      options:NSRegularExpressionSearch
                                                                        range:NSMakeRange(0, [simpleNumber length])];
        }
    }

    return simpleNumber;
}

希望对您有所帮助

Answer 2

我是这样实现的。我将从头开始解释。所以，新用户可以从头开始。

从 here 下载 libPhoneNumber-iOS 库。在该 link 页面的底部，您会找到需要添加到项目中的文件。

您的捆绑包应如下所示：

现在，按照以下步骤实施。

(1) 在需要格式化文本字段的视图控制器中导入文件。

#import "NBPhoneMetaDataGenerator.h"
#import "NBPhoneNumberUtil.h"
#import "NBAsYouTypeFormatter.h"

并在头文件中创建 NBAsYouTypeFormatter 类型的实例：

NBAsYouTypeFormatter *asYouTypeFormatter;

(2) 在该视图控制器的 viewDidLoad 方法中，初始化之前获取的对象：

asYouTypeFormatter = [[NBAsYouTypeFormatter alloc] initWithRegionCode:@"IN"];

注意：@"IN" 适用于印度。您可以将其设置为任何您想要的。请参阅将包含在 libPhoneNumber-iOS 库中的 plist 文件以查看区域代码的完整列表。

(3)在UITextField的delegate方法中，动态管理你的textfield的文本。

#pragma mark
#pragma mark - Phone Number textfield formatting

# define LIMIT 18 // Or whatever you want

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    // Just allow 18 digits
    if(!(([string length] + range.location) > LIMIT))
    {
        // Something entered by user
        if(range.length == 0)
        {
            [textNumber setText:[self.asYouTypeFormatter inputDigit:string]];
        }

        // Backspace
        else if(range.length == 1)
        {
            [textNumber setText:[self.asYouTypeFormatter removeLastDigit]];
        }
    }

    return NO;
}

希望对大家有帮助!!!

如何在 iOS 中针对不同的区域代码实时格式化 phone 数字（使用 UITextfield 时）？

How to format phone number realtime (when using UITextfield) in iOS for different region codes?

ios

libphonenumber