Swift 手机号复制粘贴的处理

目录

• 需求：手机号输入在输入的时候可以复制进去：比如：+86 18500652881、18500652881、86 18500652881、18500\n652881
• 思路：复制信息拦截做处理，处理后再进行正则、长度等校验
• 代码实现
  • 复制拦截
  • 具体代码实现

一、复制拦截

1.1、这里以UITextFiled为例

创建继承于UITextField的类，暂且命名为JKPastedTextField，重写paste方法

import UIKit

public class JKPastedTextField: UITextField {
    // 是否正在复制
    public var isPasting = false
    public override func paste(_ sender: Any?) {
        super.paste(sender)
        isPasting = true
    }
}

1.2、监听代理方法：UITextFieldDelegate

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    if infoTextField.isPasting {
        debugPrint("✅复制----：\(string)")
    } else {
        debugPrint("💣不是复制----：\(string)")
    }
    return textField.jk.inputRestrictions(shouldChangeTextIn: range, replacementText: string, maxCharacters: maxCharacters, regex: "^[A-Za-z0-9]+$", lenghType: lenghType, isRemovePasteboardNewlineCharacters: true)
}

提示：inputRestrictions方法是在库JKSwiftExtension中UITextField+Extension.swift的扩展方法，专门用来处理输入长度、输入长度超出截取、正则判断、复制粘贴等逻辑的方法

二、具体代码实现

- 2.1、手机号+86、86、换行\n、空格等处理

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    var content = string
    if phoneNumberTextField.isPasting {
        debugPrint("✅复制----：\(string)")
        if content.jk.isHasPrefix(prefix: "+86") {
            content = content.jk.removeSomeStringUseSomeString(removeString: "+86", replacingString: "")
        }
        if content.jk.isHasPrefix(prefix: "86") {
            content = content.jk.removeSomeStringUseSomeString(removeString: "86", replacingString: "")
        }
        content = content.jk.removeAllLineAndSapcefeed
    } else {
        debugPrint("💣不是复制----：\(string)")
    }
    return textField.jk.inputRestrictions(shouldChangeTextIn: range, replacementText: content, maxCharacters: maxCharacters, regex: "^[A-Za-z0-9]+$", lenghType: lenghType, isRemovePasteboardNewlineCharacters: true)
}

2.2、具体的细节处理，核心的内容还在扩展里面的，下面只是部分代码，具体的请到 JKSwiftExtension里面查看

// MARK: 限制字数的输入(提示在：- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string; 里面调用)
/// 限制字数的输入
/// - Parameters:
///   - range: 范围
///   - text: 输入的文字
///   - maxCharacters: 限制字数
///   - regex: 可输入内容(正则)
///   - isInterceptString: 复制文字进来，在字数限制的情况下，多余的字体是否截取掉，默认true
///   - isRemovePasteboardNewlineCharacters: 复制的内容是否移除前后的换行符
///   - isMarkedTextRangeCanInput: 高亮状态，原始数据如果小于限制字数，默认不可以继续输入
/// - Returns: 返回是否可输入
///
/// 提示：注入想要处理复制的内容：使用的UITextField继承JKPastedTextField，也可以自己按照我的这种方式自己个性化处理
func inputRestrictions(shouldChangeTextIn range: NSRange, replacementText text: String, maxCharacters: Int, regex: String?, isInterceptString: Bool = true, lenghType: StringTypeLength = .count, isRemovePasteboardNewlineCharacters: Bool = false, isMarkedTextRangeCanInput: Bool = false) -> Bool {
    guard !text.isEmpty else {
        return true
    }
    guard let oldContent = self.base.text else {
        return false
    }
    // 输入新的内容
    var inputingContent = text
    if let pastedTextField = self.base as? JKPastedTextField, isRemovePasteboardNewlineCharacters, pastedTextField.isPasting {
        // 复制内容，只处理前后的空格和换行
        inputingContent = inputingContent.jk.removeAllLineAndSapcefeed
        pastedTextField.isPasting = false
        if let weakRegex = regex, !JKRegexHelper.match(inputingContent, pattern: weakRegex) {
            return false
        }
        let remainingLength = maxCharacters - oldContent.jk.typeLengh(lenghType)
        // 可以插入字符串
        let endString = getInputText(inputingContent: inputingContent, remainingLength: remainingLength, lenghType: lenghType)
        let newString = oldContent.jk.insertString(content: endString, locat: range.location)
        self.base.text = newString
        self.base.sendActions(for: .editingChanged)
        // 异步改变
        JKAsyncs.asyncDelay(0.1) {} _: {
            let endPosition = self.base.position(from: elf.base.beginningOfDocument, offset: range.location + endString.count)
            if let endPosition = endPosition {
                self.base.selectedTextRange = self.base.textRange(from: endPosition, to: endPosition)
            }
        }
        return false
    }
}

demo