UITextField shouldChangeCharactersInRange不检测第一个字符
问题描述:
我有一个UITextField,我试图将其格式化为电话号码,但是我挣扎得到UITextField的第一个字母出于某种原因。UITextField shouldChangeCharactersInRange不检测第一个字符
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
{
if textField == myTextField {
var updatedTextString : NSString = PartialFormatter().formatPartial(textField.text!)
self.formattedPhoneNumber(updatedTextString, textField: textField)
}
return true
}
func formattedPhoneNumber(updatedTextString: NSString, textField: UITextField) {
textField.text = updatedTextString as String
print(updatedTextString)
}
我在做什么错?
请注意,我为了使用PhoneNumberKit格式化电话号码(与使用PartialFormatter().formatPartial
)
编辑:我试着在文本框的文本的开头添加一个默认+
符号(如数字+44 ..)
var updatedTextString : NSString = PartialFormatter().formatPartial("+\(textField.text!)")
但它完全错了。它首先保持打印++++,然后修复4个或更多字符。
如此这般像...
I press 1 - `+1` on UITextField - `+` on console
then press 5 - `++15` on UITextField - `++1` on console
then press 6 - `+++156` on UITextField - `+++15` on console
then press 8 - `+1568` on UITextField - `+1 56` on console
// so it magically fixed itself after 4 chars.
Also removing everything leaves `+++` on UITextField and `++++` on console
and doesn't delete more
我在做什么错?
编辑2:
我尝试使用下面张贴的答案。但现在,它只是简单的数字。他们不与PartialFormatter().formatPartial()
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
{
if textField == myTextField {
let textString : NSString = textField.text!
let candidateString : NSString = textString.stringByReplacingCharactersInRange(range, withString: string)
let updatedTextString : NSString = PartialFormatter().formatPartial(candidateString as String)
self.formattedPhoneNumber(updatedTextString, textField: textField)
}
return true
}
答
分组的shouldChangeCharactersInRange()函数是要求改变是否应适用,但尚未允许您的文本字段进行修改。
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
{
if textField == myTextField {
let textString : NSString = textField.text!
let candidateString : NSString = textString.stringByReplacingCharactersInRange(range, withString: string)
let updatedTextString : NSString = PartialFormatter().formatPartial(candidateString as String)
print(updatedTextString)
textField.text = updatedTextString
}
return true
}
我让你的例子工作并编辑你的答案。但是,它现在不会将数字分组为'PartialFormatter()。formatPartial'预计会做;它只显示简单的数字。但是,现在检测字符工作正常 – senty