UITextField 输入金额
UITextField to Input Money Amount
我正在开发一个销售点应用程序。
所以我想
假设用户输入 100000
但我希望它自动显示 100,000
。 1000000
变成 1,000,000
第二个问题是,我不希望用户能够自己输入 .
。
第三个问题,既然是钱,我们不能让用户一开始就输入0。
有什么想法吗?
到目前为止,我已经设法将输入限制为十进制数字
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
let numberSet: NSCharacterSet = NSCharacterSet.decimalDigitCharacterSet().invertedSet;
return string.stringByTrimmingCharactersInSet(numberSet).length > 0 || string == "";
}
非常感谢
P.S.: 我不需要任何小数位,我们还需要考虑用户在按下退格键时更改光标位置
Simple thing i came up with fully tested on Swift 2.0
您可以使用任何一个 textField 委托来查看哪一个套件适合您
let price = Int(textField.text!)
let _curFormatter : NSNumberFormatter = NSNumberFormatter()
_curFormatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
_curFormatter.currencyCode = "INR"
_curFormatter.maximumFractionDigits = 0
let total = _curFormatter.stringFromNumber(price!)
textField.text = total
Xcode 9 • Swift 4
import UIKit
class IntegerField: UITextField {
var lastValue = 0
let maxValue = 1_000_000_000
var amount: Int {
if let newValue = Int(string.digits), newValue < maxValue {
lastValue = newValue
} else if !hasText {
lastValue = 0
}
return lastValue
}
override func didMoveToSuperview() {
textAlignment = .right
keyboardType = .numberPad
text = Formatter.decimal.string(for: amount)
addTarget(self, action: #selector(editingChanged), for: .editingChanged)
}
@objc func editingChanged(_ textField: UITextField) {
text = Formatter.decimal.string(for: amount)
}
}
extension NumberFormatter {
convenience init(numberStyle: Style) {
self.init()
self.numberStyle = numberStyle
}
}
struct Formatter {
static let decimal = NumberFormatter(numberStyle: .decimal)
}
extension UITextField {
var string: String { return text ?? "" }
}
extension String {
private static var digitsPattern = UnicodeScalar("0")..."9"
var digits: String {
return unicodeScalars.filter { String.digitsPattern ~= [=11=] }.string
}
}
extension Sequence where Iterator.Element == UnicodeScalar {
var string: String { return String(String.UnicodeScalarView(self)) }
}
我正在开发一个销售点应用程序。
所以我想
假设用户输入
100000
但我希望它自动显示100,000
。1000000
变成1,000,000
第二个问题是,我不希望用户能够自己输入
.
。第三个问题,既然是钱,我们不能让用户一开始就输入0。
有什么想法吗?
到目前为止,我已经设法将输入限制为十进制数字
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
let numberSet: NSCharacterSet = NSCharacterSet.decimalDigitCharacterSet().invertedSet;
return string.stringByTrimmingCharactersInSet(numberSet).length > 0 || string == "";
}
非常感谢
P.S.: 我不需要任何小数位,我们还需要考虑用户在按下退格键时更改光标位置
Simple thing i came up with fully tested on Swift 2.0
您可以使用任何一个 textField 委托来查看哪一个套件适合您
let price = Int(textField.text!)
let _curFormatter : NSNumberFormatter = NSNumberFormatter()
_curFormatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
_curFormatter.currencyCode = "INR"
_curFormatter.maximumFractionDigits = 0
let total = _curFormatter.stringFromNumber(price!)
textField.text = total
Xcode 9 • Swift 4
import UIKit
class IntegerField: UITextField {
var lastValue = 0
let maxValue = 1_000_000_000
var amount: Int {
if let newValue = Int(string.digits), newValue < maxValue {
lastValue = newValue
} else if !hasText {
lastValue = 0
}
return lastValue
}
override func didMoveToSuperview() {
textAlignment = .right
keyboardType = .numberPad
text = Formatter.decimal.string(for: amount)
addTarget(self, action: #selector(editingChanged), for: .editingChanged)
}
@objc func editingChanged(_ textField: UITextField) {
text = Formatter.decimal.string(for: amount)
}
}
extension NumberFormatter {
convenience init(numberStyle: Style) {
self.init()
self.numberStyle = numberStyle
}
}
struct Formatter {
static let decimal = NumberFormatter(numberStyle: .decimal)
}
extension UITextField {
var string: String { return text ?? "" }
}
extension String {
private static var digitsPattern = UnicodeScalar("0")..."9"
var digits: String {
return unicodeScalars.filter { String.digitsPattern ~= [=11=] }.string
}
}
extension Sequence where Iterator.Element == UnicodeScalar {
var string: String { return String(String.UnicodeScalarView(self)) }
}