我正在使用UITextField,我希望它的格式应该是xx-xx-xxx格式的数字。
任何帮助?
答案 0 :(得分:59)
对于具有可变格式的电话号码,我们需要做得很好,这就是我写的。随意重用 - 首先我有一个方法来过滤格式化的字符串,#是一个数字,任何其他字符是某种“填充”,应该在用户到达需要的地方后方便地插入
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];
}
现在他们可以通过填充删除,我修改了我应该更改范围内的字符。
- (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;
}
这提供了一种非常干净的方式来强制用户输入特定格式的数字。
答案 1 :(得分:18)
尝试下面它会起作用
<强>目标C 强>
- (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;
}
<强>夫特-3 强>
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
}
}
答案 2 :(得分:4)
在textField:shouldChangeCharactersInRange:replacementString:
内实施您的逻辑,这是一种委托方法。
答案 3 :(得分:2)
Swift类型的长方法但工作正常:iOS 8
的ViewController //编程标记----- ----- ---- ----- ----- ---- ----- ----- ----
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 mark --- ---- --- ----
// 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
----------- INSIDE您的命令方法或文件--------
// prgm mark ----
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
答案 4 :(得分:2)
在看了每个人的答案之后,我就采取了这个看法。
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
}
答案 5 :(得分:2)
我的解决方案就是这样:
在您的textfield代理中实施:
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 = ""
}
}
那个小帮手作为扩展名:
extension UITextField {
func setCursor(position: Int) {
let position = self.position(from: beginningOfDocument, offset: position)!
selectedTextRange = textRange(from: position, to: position)
}
}
PS:当您尝试在编辑时移动光标
时,该实现中仍然存在错误答案 6 :(得分:1)
您可以将textField所需的任何模式调用path到此方法中:
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
}
}
示例:
guard let text = textField.text else { return }
textField.text = text.applyPatternOnNumbers(pattern: "##-##-###", replacmentCharacter: "#")
答案 7 :(得分:1)
经过对其中一个答案的一些自定义后,这对我有用。
extension String {
func applyPatternOnNumbers(pattern: String, filler: Character) -> String {
var pureNumber = self.replacingOccurrences( of: "[^0-9]", with: "", options: .regularExpression)
// Insert filler for all occurances of filler in pattern
for index in pattern.indices {
print(pattern[index])
let patternChar = pattern[index]
if patternChar == filler {
if index <= pureNumber.endIndex {
pureNumber.insert(filler, at: index)
}
}
}
return pureNumber
}
}
用法:
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
if(text == "\n") {
textView.resignFirstResponder()
return false
} else if !text.isEmpty {
guard let text = textView.text else { return true }
textView.text = text.applyPatternOnNumbers(pattern: "###-##-####", filler: "-")
}
return true
}
答案 8 :(得分:0)
我的谷歌搜索告诉我你应该实施
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
来自UITextFieldDelegate
协议。
有关详细信息,请查看this。
答案 9 :(得分:0)
如果你希望它像日期一样,你就可以制作你自己的日期格式化程序:
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.
Getting Current Time in string in Custom format in objective c