1. + (void)GBSpaceConstraintsLimitString:(id)Textfield
    3.                                 limitMaxWord:(NSInteger)limitMaxWord{
    5.     if ([Textfield isKindOfClass:UITextField.class]) {
    7.         if ([(UITextField *)Textfield text].length > limitMaxWord) {
    9.             UITextRange *markedRange = [Textfield markedTextRange];
    11.             if (markedRange) {
    13.                 return;
    15.             }
    17.             //Emoji占2个字符，如果是超出了半个Emoji，用15位置来截取会出现Emoji截为2半
    19.             //超出最大长度的那个字符序列(Emoji算一个字符序列)的range
    21.             NSString * temText = @"";
    23.             NSString * checker = [NSString stringWithFormat:@"%C", 8198]; // 英文输入时的字符集
    25.             if ([[(UITextField *)Textfield text] rangeOfString:checker].length) {
    27.                 temText = [[(UITextField *)Textfield text] stringByReplacingOccurrencesOfString:checker withString:@""];
    29.             }else{
    31.                 temText = [(UITextField *)Textfield text];
    33.             }
    37.             NSRange range = [temText rangeOfComposedCharacterSequenceAtIndex:limitMaxWord];
    39.             ((UITextField *)Textfield).text = [temText substringToIndex:range.location];
    41.         }
    43.     }else if ([Textfield isKindOfClass:UITextView.class]){
    45.         if ([(UITextView *)Textfield text].length > limitMaxWord) {
    47.             UITextRange *markedRange = [Textfield markedTextRange];
    49.             if (markedRange) {
    51.                 return;
    53.             }
    55.             //Emoji占2个字符，如果是超出了半个Emoji，用15位置来截取会出现Emoji截为2半
    57.             //超出最大长度的那个字符序列(Emoji算一个字符序列)的range
    59.             NSString * temText = @"";
    61.             NSString * checker = [NSString stringWithFormat:@"%C", 8198]; // 英文输入时的字符集
    63.             if ([[(UITextView *)Textfield text] rangeOfString:checker].length) {
    65.                 temText = [[(UITextView *)Textfield text] stringByReplacingOccurrencesOfString:checker withString:@""];
    67.             }else{
    69.                 temText = [(UITextView *)Textfield text];
    71.             }
    75.             NSRange range = [temText rangeOfComposedCharacterSequenceAtIndex:limitMaxWord];
    77.             ((UITextView *)Textfield).text = [temText substringToIndex:range.location];
    79.         }
    81.     }
    83. }