以下でお試しください
Objective-C
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
int groupingSize = 2;
if([string length] == 0) {
groupingSize = 4;
}
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init] ;
NSString *separator = @"-";
[formatter setGroupingSeparator:separator];
[formatter setGroupingSize:groupingSize];
[formatter setUsesGroupingSeparator:YES];
[formatter setSecondaryGroupingSize:2];
if (![string isEqual: @""] && (textField.text != nil && textField.text.length > 0)) {
NSString *num = textField.text;
num = [num stringByReplacingOccurrencesOfString:separator withString:@""];
NSString *str = [formatter stringFromNumber:[NSNumber numberWithDouble:[num doubleValue]]];
textField.text = str;
}
return YES;
}
Swift-
extension ViewController: UITextFieldDelegate {
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
var groupSize = 2
let separator = "-"
if string.characters.count == 0 {
groupSize = 4
}
let formatter = NumberFormatter()
formatter.groupingSeparator = separator
formatter.groupingSize = groupSize
formatter.usesGroupingSeparator = true
formatter.secondaryGroupingSize = 2
if var number = textField.text, string != "" {
number = number.replacingOccurrences(of: separator, with: "")
if let doubleVal = Double(number) {
let requiredString = formatter.string(from: NSNumber.init(value: doubleVal))
textField.text = requiredString
}
}
return true
}
}
可変フォーマットの電話番号に対してこれをうまく行う必要があったので、私が書いたものは次のとおりです。自由に再利用してください-最初に、フォーマットされた文字列をフィルタリングするメソッドを用意しました。＃は数字で、その他の文字は、ユーザーが必要な場所に到達した後に挿入する必要がある何らかの「フィラー」です。 。
NSMutableString *filteredPhoneStringFromStringWithFilter(NSString *string, 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 >= string.length ? '\0' : [string 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];
}
フィラーから削除できるように、範囲内の文字を変更するように変更しました。
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString *filter = @"(###) ### - ####";
if(!filter) return YES; // No filter provided, allow anything
NSString *changedString = [textField.text stringByReplacingCharactersInRange:range withString:string];
if(range.length == 1 && // Only do for single deletes
string.length < range.length &&
[[textField.text substringWithRange:range] rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"0123456789"]].location == NSNotFound)
{
// Something was deleted. Delete past the previous number
NSInteger location = changedString.length-1;
if(location > 0)
{
for(; location > 0; location--)
{
if(isdigit([changedString characterAtIndex:location]))
{
break;
}
}
changedString = [changedString substringToIndex:location];
}
}
textField.text = filteredPhoneStringFromStringWithFilter(changedString, filter);
return NO;
}
これにより、ユーザーに特定の形式で数値を入力させる非常にクリーンな方法が提供されます。
デリゲートメソッドであるtextField:shouldChangeCharactersInRange:replacementString:内にロジックを実装します。
みんなの答えを見た後の私の見解は次のとおりです。
Swift 4
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let separator = "-"
let filler = "X"
if var number = textField.text, string != "" {
number = number.replacingOccurrences(of: separator, with: "")
number = number.replacingOccurrences(of: filler, with: "")
if number.count == 10 { return false }
number += string
while number.count < 10 { number += "X" }
number.insert("-", at: number.index(number.startIndex,
offsetBy: 6))
number.insert("-", at: number.index(number.startIndex,
offsetBy: 3))
textField.text = number
}
return false
}
Swiftの長いメソッドの一種ですが、正常に動作します：iOS 8
ViewController //プログラミングマーク----- ----- ---- ----- ----- ---- ----- ----- ----
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
self.tfCardNumber.addTarget(self, action: "creditCardNumberFormatter:", forControlEvents: .EditingChanged)
self.tfExpiryValue.addTarget(self, action: "creditCardExpiryFormatter:", forControlEvents: .EditingChanged)
}// end viewDidAppear
func creditCardNumberFormatter(sender: AnyObject!) {
// create object universally access global methods
var objMethodInc = MethodInc(object: self)
var formattedText = objMethodInc.formatCreditCard(self.tfCardNumber.text)
if formattedText != self.tfCardNumber.text {
self.tfCardNumber.text = formattedText
}
if countElements(self.tfCardNumber.text) == 19 {
self.tfCardNumber.resignFirstResponder()
self.tfExpiryValue.becomeFirstResponder()
}
}// end creditCardNumberFormatter
func creditCardExpiryFormatter(sender: AnyObject!) {
// create object universally access global methods
var objMethodInc = MethodInc(object: self)
var formattedText = objMethodInc.formatCreditCardExpiry(self.tfExpiryValue.text)
if formattedText != self.tfExpiryValue.text {
self.tfExpiryValue.text = formattedText
}
}// end creditCardExpiryFormatter
// prgmマーク--- ---- --- ----
// delegate for textfield
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange
, replacementString string: String) -> Bool {
if string == "" {
return true
}
if textField == self.tfCardNumber {
if countElements(self.tfCardNumber.text) > 18 {
return false
} else if textField == self.tfExpiryValue {
if countElements(self.tfExpiryValue.text) > 4 {
return false
}
}
}
return true
}// end textField
-----------コマンドメソッドまたはファイルの内部--------
// prgmマーク----
func formatCreditCard(input: NSString) -> String {
var input = self.trimSpecialCharacters(input);
println("formatCreditCard input \(input)")
var output : NSString?
switch (input.length) {
case 1: output = input
case 2: output = input
case 3: output = input
case 4:
var vs = input.substringToIndex(input.length)
output = NSString(string: "\(vs)")
break
case 5: output = input
case 6: output = input
case 7: output = input
case 8:
var vs1 = input.substringToIndex(4)
var vs2 = input.substringFromIndex(4)
output = NSString(string: "\(vs1)-\(vs2)")
break
case 9: output = input
case 10: output = input
case 11: output = input
case 12:
var vs1 = input.substringToIndex(4)
var vs2 = input.substringWithRange(NSMakeRange(4, 4))
var vs3 = input.substringFromIndex(8)
output = NSString(string: "\(vs1)-\(vs2)-\(vs3)")
break
case 13: output = input
case 14: output = input
case 15: output = input
case 16:
var vs1 = input.substringToIndex(4)
var vs2 = input.substringWithRange(NSMakeRange(4, 4))
var vs3 = input.substringWithRange(NSMakeRange(8, 4))
var vs4 = input.substringFromIndex(12)
output = NSString(string: "\(vs1)-\(vs2)-\(vs3)-\(vs4)")
break
default:
output = input
break
}// end switch
println("formatCreditCard out \(output!)")
return output!
}// end formatCreditCard
// prgm mark ----
func formatCreditCardExpiry(input: NSString) -> String {
var output : NSString?
var input = self.trimSpecialCharacters(input);
switch (input.length) {
case 1: output = input
case 2:
var vs = input.substringToIndex(input.length)
output = NSString(string: "\(vs)")
break
case 3: output = input
case 4:
var vs1 = input.substringToIndex(2)
var vs2 = input.substringFromIndex(2)
output = NSString(string: "\(vs1)/\(vs2)")
break
default:
output = input
break
}
return output!
}// end formatCreditCardExpiry
func trimSpecialCharacters(input: NSString) -> NSString {
var special = NSCharacterSet(charactersInString: "/+-() ")
var comp = input.componentsSeparatedByCharactersInSet(special) as NSArray
return comp.componentsJoinedByString("")
}//end trimSpecialCharacters
私の解決策はそのように機能します：
テキストフィールドのデリゲートに実装します。
func textFieldDidBeginEditing(_ textField: UITextField) {
// When you start editing check if there is nothing, in that case add the entire mask
if let text = textField.text, text == "" || text == "DD/MM/YYYY" {
textField.text = "DD/MM/YYYY"
textField.textColor = .lightGray
textField.setCursor(position: text.count)
}
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
guard var number = textField.text else {
return true
}
// If user try to delete, remove the char manually
if string == "" {
number.remove(at: number.index(number.startIndex, offsetBy: range.location))
}
// Remove all mask characters
number = number.replacingOccurrences(of: "/", with: "")
number = number.replacingOccurrences(of: "D", with: "")
number = number.replacingOccurrences(of: "M", with: "")
number = number.replacingOccurrences(of: "Y", with: "")
// Set the position of the cursor
var cursorPosition = number.count+1
if string == "" {
//if it's delete, just take the position given by the delegate
cursorPosition = range.location
} else {
// If not, take into account the slash
if cursorPosition > 2 && cursorPosition < 5 {
cursorPosition += 1
} else if cursorPosition > 4 {
cursorPosition += 2
}
}
// Stop editing if we have rich the max numbers
if number.count == 8 { return false }
// Readd all mask char
number += string
while number.count < 8 {
if number.count < 2 {
number += "D"
} else if number.count < 4 {
number += "M"
} else {
number += "Y"
}
}
number.insert("/", at: number.index(number.startIndex, offsetBy: 4))
number.insert("/", at: number.index(number.startIndex, offsetBy: 2))
// Some styling
let enteredTextAttribute = [NSForegroundColorAttributeName: UIColor.black, NSFontAttributeName: UIFont.systemFont(ofSize: 15)]
let maskTextAttribute = [NSForegroundColorAttributeName: UIColor.lightGray, NSFontAttributeName: UIFont.systemFont(ofSize: 15)]
let partOne = NSMutableAttributedString(string: String(number.prefix(cursorPosition)), attributes: enteredTextAttribute)
let partTwo = NSMutableAttributedString(string: String(number.suffix(number.count-cursorPosition)), attributes: maskTextAttribute)
let combination = NSMutableAttributedString()
combination.append(partOne)
combination.append(partTwo)
textField.attributedText = combination
textField.setCursor(position: cursorPosition)
return false
}
func textFieldDidEndEditing(_ textField: UITextField) {
if let text = textField.text, text != "" && text != "DD/MM/YYYY" {
// Do something with your value
} else {
textField.text = ""
}
}
そして、拡張としての小さなヘルパー：
extension UITextField {
func setCursor(position: Int) {
let position = self.position(from: beginningOfDocument, offset: position)!
selectedTextRange = textRange(from: position, to: position)
}
}
PS：編集中にカーソルを移動しようとすると、その実装にはまだバグがあります
このメソッドへのパスは、textFieldに必要な任意のパターンで呼び出すことができます。
extension String {
func applyPatternOnNumbers(pattern: String, replacmentCharacter: Character) -> String {
var pureNumber = self.replacingOccurrences( of: "[^0-9]", with: "", options: .regularExpression)
for index in 0 ..< pattern.count {
guard index < pureNumber.count else { return pureNumber }
let stringIndex = String.Index(encodedOffset: index)
let patternCharacter = pattern[stringIndex]
guard patternCharacter != replacmentCharacter else { continue }
pureNumber.insert(patternCharacter, at: stringIndex)
}
return pureNumber
}
}
例：
guard let text = textField.text else { return }
textField.text = text.applyPatternOnNumbers(pattern: "##-##-###", replacmentCharacter: "#")
私のグーグル検索はあなたが実装するべきだと私に言っています
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
UITextFieldDelegateプロトコルから。
詳しくは this をご覧ください。
日付のようなものにしたい場合は、次のように独自の日付フォーマッタを作成できます。
NSDateFormatter *formatter;
NSString *dateString;
formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"dd-MM-yyyy HH:mm"]; //or something in your own style
dateString = [formatter stringFromDate:[NSDate date]];
[formatter release]; // maybe; you might want to keep the formatter
// if you're doing this a lot.