找比較全面的表情判斷看這里就行了 NEW
extension Character {
var isSimpleEmoji: Bool {
guard let firstScalar = unicodeScalars.first else {
return false
}
return firstScalar.properties.isEmoji && firstScalar.value > 0x238C
}
var isCombinedIntoEmoji: Bool {
unicodeScalars.count > 1 && unicodeScalars.first?.properties.isEmoji ?? false
}
var isEmoji: Bool { isSimpleEmoji || isCombinedIntoEmoji }
}
extension String {
var isSingleEmoji: Bool {
return count == 1 && containsEmoji
}
var containsEmoji: Bool {//是否包含emoji
return contains { $0.isEmoji }
}
var containsOnlyEmoji: Bool {//是否全是emoji
return !isEmpty && !contains { !$0.isEmoji }
}
var emojiString: String {
return emojis.map { String($0) }.reduce("", +)
}
var emojis: [Character] {
return filter { $0.isEmoji }
}
var emojiScalars: [UnicodeScalar] {
return filter { $0.isEmoji }.flatMap { $0.unicodeScalars }
}
func stringByRemovingEmoji() -> String {//刪除字符串中的emoji
return String(self.filter { !($0.isEmoji) })
}
}
textField 禁止輸入表情
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if let text = textField.text,
let textRange = Range(range, in: text) {
let updatedText = text.replacingCharacters(in: textRange, with: string)
if updatedText.containsEmoji {
return false
}
}
return true
}
簡(jiǎn)單袍嬉、實(shí)用
參考
