Swift输入框过滤表情

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {var isText = trueif text.containsEmoji {if String.isInputRuleNotBlank(str: text) {isText = true} else {isText = false}}return isText}extension String {// 是否包含表情var containsEmoji: Bool {for scalar in unicodeScalars {switch scalar.value {case0x00A0...0x00AF,0x2030...0x204F,0x2120...0x213F,0x2190...0x21AF,0x2310...0x329F,0x1F000...0x1F9CF:return truedefault:continue}}return false}/*** 字母、数字、中文正则判断（不包括空格）*注意: 因为考虑到输入习惯,许多人习惯使用九宫格,这里在正常选择全键盘输入错误的时候,进行九宫格判断,九宫格对应的是下面➋➌➍➎➏➐➑➒的字符*/static func isInputRuleNotBlank(str:String) -> Bool {let pattern = "^[a-zA-Z\\u4E00-\\u9FA5\\d]*$"let pred = NSPredicate(format: "SELF MATCHES %@", pattern)let isMatch = pred.evaluate(with: str)if !isMatch {let other = "➋➌➍➎➏➐➑➒"let len = str.characters.countfor i in 0..<len {let tmpStr = str as NSStringlet tmpOther = other as NSStringlet c = tmpStr.character(at: i)if !((isalpha(Int32(c))) > 0 || (isalnum(Int32(c))) > 0 || ((Int(c) == "_".hashValue)) || (Int(c) == "-".hashValue) || ((c >= 0x4e00 && c <= 0x9fa6)) || (tmpOther.range(of: str).location != NSNotFound)) {return false}return true}}return isMatch}// MARK: 过滤字符串中的特殊字符public func stringReplacingOccurrencesOfString() {let str: NSString = self as NSStringlet charactersInString = "[]{}（#%-*+=_）\\|~(＜＞$%^&*)_+ "let doNotWant = CharacterSet.init(charactersIn: charactersInString)let componentsArrays = str.components(separatedBy: doNotWant)let hmutStr = componentsArrays.joined(separator: "")print("humStr is：\(hmutStr)")}}

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Swift输入框过滤表情

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