Formateo del número de teléfono

Tengo un campo de texto donde el usuario ingresa datos. Es un campo de número de teléfono. Si el usuario ingresa 1234567890 , quiero que se muestre como (123)-(456)-7890 medida que el usuario escribe. ¿Cómo es esto posible?

Esto te ayudara

Formato (xxx) xxx-xxxx

 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { int length = (int)[self getLength:textField.text]; //NSLog(@"Length = %d ",length); 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]; //NSLog(@"%@",[num substringToIndex:3]); //NSLog(@"%@",[num substringFromIndex:3]); 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:@""]; NSLog(@"%@", mobileNumber); int length = (int)[mobileNumber length]; if(length > 10) { mobileNumber = [mobileNumber substringFromIndex: length-10]; NSLog(@"%@", mobileNumber); } 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 = (int)[mobileNumber length]; return length; } 

Esto se sintió más claro y maneja la eliminación de los caracteres no deseados mucho más agradable. Formatea correctamente para 1 (###) ### – #### o (###) ### – ####

 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string]; NSArray *components = [newString componentsSeparatedByCharactersInSet:[[NSCharacterSet decimalDigitCharacterSet] invertedSet]]; NSString *decimalString = [components componentsJoinedByString:@""]; NSUInteger length = decimalString.length; BOOL hasLeadingOne = length > 0 && [decimalString characterAtIndex:0] == '1'; if (length == 0 || (length > 10 && !hasLeadingOne) || (length > 11)) { textField.text = decimalString; return NO; } NSUInteger index = 0; NSMutableString *formattedString = [NSMutableString string]; if (hasLeadingOne) { [formattedString appendString:@"1 "]; index += 1; } if (length - index > 3) { NSString *areaCode = [decimalString substringWithRange:NSMakeRange(index, 3)]; [formattedString appendFormat:@"(%@) ",areaCode]; index += 3; } if (length - index > 3) { NSString *prefix = [decimalString substringWithRange:NSMakeRange(index, 3)]; [formattedString appendFormat:@"%@-",prefix]; index += 3; } NSString *remainder = [decimalString substringFromIndex:index]; [formattedString appendString:remainder]; textField.text = formattedString; return NO; } 

El código de abajo es lo que uso habitualmente. El formato es diferente pero obtienes la imagen. Esto manejará entradas como ‘123df # $ @ $ gdfg45- + 678dfg901’ y salida ‘1 (234) 567-8901’

 #import "NSString+phoneNumber.h" @implementation NSString (phoneNumber) -(NSString*) phoneNumber{ static NSCharacterSet* set = nil; if (set == nil){ set = [[NSCharacterSet decimalDigitCharacterSet] invertedSet]; } NSString* phoneString = [[self componentsSeparatedByCharactersInSet:set] componentsJoinedByString:@""]; switch (phoneString.length) { case 7: return [NSString stringWithFormat:@"%@-%@", [phoneString substringToIndex:3], [phoneString substringFromIndex:3]]; case 10: return [NSString stringWithFormat:@"(%@) %@-%@", [phoneString substringToIndex:3], [phoneString substringWithRange:NSMakeRange(3, 3)],[phoneString substringFromIndex:6]]; case 11: return [NSString stringWithFormat:@"%@ (%@) %@-%@", [phoneString substringToIndex:1], [phoneString substringWithRange:NSMakeRange(1, 3)], [phoneString substringWithRange:NSMakeRange(4, 3)], [phoneString substringFromIndex:7]]; case 12: return [NSString stringWithFormat:@"+%@ (%@) %@-%@", [phoneString substringToIndex:2], [phoneString substringWithRange:NSMakeRange(2, 3)], [phoneString substringWithRange:NSMakeRange(5, 3)], [phoneString substringFromIndex:8]]; default: return nil; } } @end 

Escribimos una subclase de NSFormatter personalizada para los números de teléfono aquí: https://github.com/edgecase/PhoneNumberFormatter

Puede usarlo como cualquier otra subclase NSFormatter.

Muchas gracias por la primera respuesta pero, creo, ese método -(int)getLength:(NSString*)mobileNumber es inútil. Puedes probar algo como a continuación:

 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{ int length = [[self formatNumber:[textField text]] length]; 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 setText:[NSString stringWithFormat:@"%@",[num substringToIndex:3]]]; } } else if (length == 6) { NSString *num = [self formatNumber:[textField text]]; [textField setText:[NSString stringWithFormat:@"(%@) %@-",[num substringToIndex:3],[num substringFromIndex:3]]]; if (range.length > 0) { [textField setText:[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; } 

Para aquellos de ustedes que requieren un formato de número internacional: https://code.google.com/p/libphonenumber/

Viene con implementaciones de C ++, Java y JavaScript. Debería ser fácil ajustar las implementaciones de C ++ en un archivo .mm y escribir un pequeño contenedor Objective-C alrededor de él.

Una opción válida es https://github.com/iziz/libPhoneNumber-iOS. Toda la otra respuesta cubre solo una pequeña parte de las posibilidades y combinaciones, esta biblioteca realmente analiza y valida CADA número de teléfono e identifica:

  • Nacionalidad
  • tipo de número de teléfono
  • Transportista nacional

Relevante para los números de teléfono de los EE. UU .:

Al agregar a la publicación de @ wan, agregué una statement condicional si el usuario comienza con el código de país (1). De esta manera, formateará para ser: 1 (XXX) XXX-XXXX en lugar de (1XX) XXX-XXXX.

  - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{ textField = self.phoneNumberTextField; NSInteger length = [self getLength:textField.text]; //NSLog(@"Length = %d ",length); if ([textField.text hasPrefix:@"1"]) { if(length == 11) { if(range.length == 0) return NO; } if(length == 4) { NSString *num = [self formatNumber:textField.text]; textField.text = [NSString stringWithFormat:@"%@ (%@) ",[num substringToIndex:1],[num substringFromIndex:1]]; if(range.length > 0) textField.text = [NSString stringWithFormat:@"%@",[num substringToIndex:4]]; } else if(length == 7) { NSString *num = [self formatNumber:textField.text]; NSRange numRange = NSMakeRange(1, 3); textField.text = [NSString stringWithFormat:@"%@ (%@) %@-",[num substringToIndex:1] ,[num substringWithRange:numRange],[num substringFromIndex:4]]; if(range.length > 0) textField.text = [NSString stringWithFormat:@"(%@) %@",[num substringToIndex:3],[num substringFromIndex:3]]; } } else { 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:@""]; NSLog(@"%@", mobileNumber); NSInteger length = [mobileNumber length]; if(length > 10) { mobileNumber = [mobileNumber substringFromIndex: length-10]; NSLog(@"%@", mobileNumber); } return mobileNumber; } -(NSInteger)getLength:(NSString*)mobileNumber { mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"(" withString:@""]; mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@")" withString:@""]; mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@" " withString:@""]; mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"-" withString:@""]; mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"+" withString:@""]; NSInteger length = [mobileNumber length]; return length; } 

Tal vez podrías usar este método simple:

 + (NSString*) formatPhoneNumber:(NSString *)phoneNumber codeLength:(int) code segmentLength:(int) segment { NSString* result = @""; int length = [phoneNumber length]; NSString* firstSegment = @""; NSString* restSegment = @""; for (int i=0; i 0) && !(threshold > length)) restSegment = [restSegment stringByAppendingFormat:@"%c", '-']; } } result = [result stringByAppendingFormat:@"%@-%@", firstSegment, restSegment]; return result; } 

Suponiendo que el método anterior está en clase de Contact , simplemente use el método de esta manera:

 NSString* phoneNumber = @"085755023455"; NSString* formattedNumber = [Contact formatPhoneNumber:phoneNumber codeLength:3 segmentLength:4]; 

Eso resultaría algo así como:

 085-7550-2345-5 

Puede usar la biblioteca AKNumericFormatter para ello. Tiene un formateador y una conveniente categoría UITextField, está disponible como un cocoapod.

La versión de C # Xamarin.iOS de la respuesta más completa sobre cómo hacer el formateo del teléfono en iOS está debajo

  public override void ViewDidLoad() { base.ViewDidLoad(); PhoneNumberTextField.ShouldChangeCharacters = ChangeCharacters; } private bool ChangeCharacters(UITextField textField, NSRange range, string replacementString) { var text = textField.Text; var newString = text.Substring(0, range.Location) + replacementString + text.Substring(range.Location + range.Length); var decimalString = Regex.Replace(newString, @"[^\d]", string.Empty); var length = decimalString.Length; var hasLeadingOne = length > 0 && decimalString[0] == '1'; if ((length == 0) || (length > 10 && !hasLeadingOne) || (length > 11)) { textField.Text = decimalString; return false; } var index = 0; var formattedString = ""; if (hasLeadingOne) { formattedString += "1"; index += 1; } if (length - index > 3) { var areaCode = decimalString.Substring(index, 3); formattedString += "(" + areaCode + ")"; index += 3; } if (length - index > 3) { var prefix = decimalString.Substring(index, 3); formattedString += " " + prefix + "-"; index += 3; } var remainder = decimalString.Substring(index); formattedString += remainder; textField.Text = formattedString; return false; } 

RÁPIDO

 func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { let length = self.getTextLength(textField.text) if length == 10{ if range.length == 0{ return false } } if length == 3{ var num : String = self.formatNumber(textField.text) textField.text = num + "-" if(range.length > 0){ textField.text = (num as NSString).substringToIndex(3) } } else if length == 6{ var num : String = self.formatNumber(textField.text) let prefix = (num as NSString).substringToIndex(3) let postfix = (num as NSString).substringFromIndex(3) textField.text = prefix + "-" + postfix + "-" if range.length > 0{ textField.text = prefix + postfix } } return true } func getTextLength(mobileNo: String) -> NSInteger{ var str : NSString = mobileNo as NSString str = str.stringByReplacingOccurrencesOfString("(", withString: "") str = str.stringByReplacingOccurrencesOfString(")", withString: "") str = str.stringByReplacingOccurrencesOfString(" ", withString: "") str = str.stringByReplacingOccurrencesOfString("-", withString: "") str = str.stringByReplacingOccurrencesOfString("+", withString: "") return str.length } func formatNumber(mobileNo: String) -> String{ var str : NSString = mobileNo as NSString str = str.stringByReplacingOccurrencesOfString("(", withString: "") str = str.stringByReplacingOccurrencesOfString(")", withString: "") str = str.stringByReplacingOccurrencesOfString(" ", withString: "") str = str.stringByReplacingOccurrencesOfString("-", withString: "") str = str.stringByReplacingOccurrencesOfString("+", withString: "") if str.length > 10{ str = str.substringFromIndex(str.length - 10) } return str as String } 

Número de teléfono con formato Swift

Mejora la respuesta de oppon @ datinc, la entrada como 1123df#$@$gdfg45-+678dfg901 saldrá como +11(234)567-8901

 func formattedPhone(phone: String) -> String? { let notPhoneNumbers = NSCharacterSet.decimalDigitCharacterSet().invertedSet let str = phone.componentsSeparatedByCharactersInSet(notPhoneNumbers).joinWithSeparator("") let startIdx = str.startIndex let endIdx = str.endIndex let count = str.characters.count if count == 7 { return "\(str[startIdx.. 10{ let extra = str.characters.count - 10 return "+\(str[startIdx.. 

Esto te ayudara

Formato (xxx) xxx-xxxx para SWIFT 3.0

 func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { let length = Int(getLength(mobileNumber: textField.text!)) if length == 15 { if range.length == 0 { return false } } if length == 3 { let num = self.formatNumber(mobileNumber: textField.text!) textField.text = NSString(format:"(%@)",num) as String if range.length > 0{ let index: String.Index = num.index(num.startIndex, offsetBy: 3) textField.text = NSString(format:"%@",num.substring(to: index)) as String } }else if length == 6 { let num = self.formatNumber(mobileNumber: textField.text!) let index: String.Index = num.index(num.startIndex, offsetBy: 3) textField.text = NSString(format:"(%@) %@-",num.substring(to: index), num.substring(from: index)) as String if range.length > 0{ textField.text = NSString(format:"(%@) %@",num.substring(to: index), num.substring(from: index)) as String } } return true } func formatNumber(mobileNumber: String) -> String { var number = mobileNumber number = number.replacingOccurrences(of: "(", with: "") number = number.replacingOccurrences(of: ")", with: "") number = number.replacingOccurrences(of: " ", with: "") number = number.replacingOccurrences(of: "-", with: "") number = number.replacingOccurrences(of: "+", with: "") let length = Int(number.characters.count) if length > 15 { let index = number.index(number.startIndex, offsetBy: 15) number = number.substring(to: index) } return number } func getLength(mobileNumber: String) -> Int { var number = mobileNumber number = number.replacingOccurrences(of: "(", with: "") number = number.replacingOccurrences(of: ")", with: "") number = number.replacingOccurrences(of: " ", with: "") number = number.replacingOccurrences(of: "-", with: "") number = number.replacingOccurrences(of: "+", with: "") let length = Int(number.characters.count) return length } 
 NSString *str=@"[+]+91[0-9]{10}"; NSPredicate *no=[NSPredicate predicateWithFormat:@"SELF MATCHES %@",str]; if([no evaluateWithObject:txtMobileno.text]==NO { UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Warning" message:@"Please Enter correct contact no." delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil]; [alert show]; [alert release]; } 

Entonces este método formateará para (xxx) xxx – xxxx ….
es una modificación de la respuesta superior actual y maneja los espacios de retroceso

 - (IBAction)autoFormat:(UITextField *)sender { NSString *mobileNumber = [NSString stringWithFormat:@"%@",sender.text]; 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 > 0 && [sender.text length] > self.oldLength){ if(length >= 7 && length <= 10){ sender.text = [NSString stringWithFormat:@"(%@) %@ - %@",[mobileNumber substringToIndex:3], [mobileNumber substringWithRange:NSMakeRange(3,3)],[mobileNumber substringWithRange:NSMakeRange(6,[mobileNumber length]-6)]]; } else if(length >= 4 && length <= 6) { sender.text = [NSString stringWithFormat:@"(%@) %@",[mobileNumber substringToIndex:3], [mobileNumber substringWithRange:NSMakeRange(3,[mobileNumber length]-3)]]; } if(length >= 11 && length % 4 == 3){ NSString *lastChar = [sender.text substringFromIndex:[sender.text length] - 1]; sender.text = [NSString stringWithFormat:@"%@ %@",[sender.text substringToIndex:[sender.text length] - 1],lastChar]; } self.oldLength = [sender.text length]; } else if([sender.text length] < self.oldLength) { NSLog(@"deleted - "); self.oldLength = 0; sender.text = @""; for (int i = 0; i < [mobileNumber length]; i = i + 1) { sender.text = [NSString stringWithFormat:@"%@%@",sender.text,[mobileNumber substringWithRange:NSMakeRange(i, 1)]]; [self autoFormat:sender]; } }} 

Espero eso ayude

REFormattedNumberField es probablemente el mejor. Solo proporcione el formato que desee.

También para formato + x (xxx) xxx-xx-xx puede usar algo como esta solución simple:

 + (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string]; NSArray *components = [newString componentsSeparatedByCharactersInSet:[[NSCharacterSet decimalDigitCharacterSet] invertedSet]]; NSString *decimalString = [components componentsJoinedByString:@""]; if (decimalString.length > 11) { return NO; } NSMutableString *formattedString = [NSMutableString stringWithString:decimalString]; [formattedString insertString:@"+" atIndex:0]; if (formattedString.length > 2) [formattedString insertString:@" (" atIndex:2]; if (formattedString.length > 7) [formattedString insertString:@") " atIndex:7]; if (formattedString.length > 12) [formattedString insertString:@"-" atIndex:12]; if (formattedString.length > 15) [formattedString insertString:@"-" atIndex:15]; textField.text = formattedString; return NO;} 
 +(NSString *) phoneNumberFormatterTextField:(NSString *)number forRange:(NSRange)range { int length = (int)[[self getPhoneNumber:number] length]; if(length == 3) { NSString *num = [MPosBaseScreenController getPhoneNumber:number]; number = [num stringByReplacingOccurrencesOfString:@"(\\d{3})" withString:@"($1) " options:NSRegularExpressionSearch range:NSMakeRange(0, num.length)]; } else if(length == 6 || length > 6 ) { NSString *num = [MPosBaseScreenController getPhoneNumber:number]; number = [num stringByReplacingOccurrencesOfString:@"(\\d{3})(\\d{3})" withString:@"($1) $2 - " options:NSRegularExpressionSearch range:NSMakeRange(0, num.length)]; } return number; } 

Aquí hay una categoría simple que imitará el formato de la entrada

 @interface NSString (formatDecimalsAs) - (NSString *)formatDecimalsAs:(NSString *)formattedDecimals; @end @implementation NSString (formatDecimalsAs) - (NSString *)formatDecimalsAs:(NSString *)formattedDecimals { // insert non-digit characters from source string NSMutableString *formattedNumber = [self mutableCopy]; for (int i = 0; i < formattedDecimals.length; i++) { if (i > formattedNumber.length) { break; } unichar character = [formattedDecimals characterAtIndex:i]; if ([[NSCharacterSet decimalDigitCharacterSet].invertedSet characterIsMember:character]) { [formattedNumber insertString:[NSString stringWithFormat:@"%c", character] atIndex:(NSUInteger) i]; } } return formattedNumber; } @end 

ejemplo de uso

 [@"87654321" formatDecimalsAs:@"1111 1111"] // returns @"8765 4321" 
  1. Elimina todos los caracteres que no sean dígitos
  2. Si quedan 7 dígitos, 123-4567
  3. por 10 dígitos, (123) 456-7890
  4. De lo contrario, grupos de tres. Para ajustar el tamaño de los grupos, cambie el valor asignado a substrsize

     -(NSString*)formatPhone:(NSString*)phone { NSString *formattedNumber = [[phone componentsSeparatedByCharactersInSet: [[NSCharacterSet decimalDigitCharacterSet] invertedSet]] componentsJoinedByString:@""]; int substrSize = 3; NSMutableArray *t = [[NSMutableArray alloc] initWithCapacity:formattedNumber.length / substrSize + 1]; switch (formattedNumber.length) { case 7: formattedNumber = [NSString stringWithFormat:@"%@-%@", [formattedNumber substringToIndex:3], [formattedNumber substringFromIndex:3]]; break; case 10: formattedNumber = [NSString stringWithFormat:@"(%@) %@-%@", [formattedNumber substringToIndex:3], [formattedNumber substringWithRange:NSMakeRange(3, 3)], [formattedNumber substringFromIndex:6]]; break; default: for (int i = 0; i < formattedNumber.length / substrSize; i++) { [t addObject:[formattedNumber substringWithRange:NSMakeRange(i * substrSize, substrSize)]]; } if (formattedNumber.length % substrSize) { [t addObject:[formattedNumber substringFromIndex:(substrSize * t.count)]]; } formattedNumber = [t componentsJoinedByString:@" "]; break; } return formattedNumber; } 

En SWIFT 3

 func formattedPhone(phone: String) -> String? { let notPhoneNumbers = CharacterSet.decimalDigits.inverted let str = phone.components(separatedBy: notPhoneNumbers).joined(separator: "") let startIdx = str.startIndex let endIdx = str.endIndex let count = str.characters.count if count == 7 { return "\(str[startIdx.. 10{ let extra = str.characters.count - 10 return "+\(str[startIdx.. 

Swift 3 string.index.advancedBy (3) alternativo:

 extension String.Index{ func advance(_ offset:Int, `for` string:String)->String.Index{ return string.index(self, offsetBy: offset) } } 

Primero, agregue UITextFieldDelegate a su archivo .h y Delegue su UITextField en el archivo de nib .

Segundo, agregue este código a su archivo .m :

  - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { NSString *filter = @"(###)-(###)-####"; if(!filter) return YES; NSString *changedString = [textField.text stringByReplacingCharactersInRange:range withString:string]; if(range.length == 1 && string.length < range.length && [[textField.text substringWithRange:range] rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"0123456789"]].location == NSNotFound) { NSInteger location = changedString.length-1; if(location > 0) { for(; location > 0; location--) { if(isdigit([changedString characterAtIndex:location])) { break; } } changedString = [changedString substringToIndex:location]; } } textField.text = [self filteredPhoneStringFromStringWithFilter:changedString :filter]; return NO; } -(NSString*) filteredPhoneStringFromStringWithFilter:(NSString*)number : (NSString*)filter{ NSUInteger onOriginal = 0, onFilter = 0, onOutput = 0; char outputString[([filter length])]; BOOL done = NO; while(onFilter < [filter length] && !done) { char filterChar = [filter characterAtIndex:onFilter]; char originalChar = onOriginal >= number.length ? '\0' : [number characterAtIndex:onOriginal]; switch (filterChar) { case '#': if(originalChar=='\0') { // We have no more input numbers for the filter. We're done. done = YES; break; } if(isdigit(originalChar)) { outputString[onOutput] = originalChar; onOriginal++; onFilter++; onOutput++; } else { onOriginal++; } break; default: // Any other character will automatically be inserted for the user as they type (spaces, - etc..) or deleted as they delete if there are more numbers to come. outputString[onOutput] = filterChar; onOutput++; onFilter++; if(originalChar == filterChar) onOriginal++; break; } } outputString[onOutput] = '\0'; // Cap the output string return [NSString stringWithUTF8String:outputString]; }