-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
if ([text isEqualToString:@""]) {
NSLog(@"刪除%@",textView.text);
return NO;
}else{
NSLog(@"---%@",text);
NSLog(@"%@",textView.text);
}
return YES;
}

/**

• 光標位置輸入
• @param emoji 要輸入的內(nèi)容emoji和字符
  */

• (void)insertStringWithGuangBiaotext:(UITextView *)textView emoji:(NSString )emoji {
  NSRange range = textView.selectedRange;
  NSLog(@"%zd-光標位置輸入-%zd",range.length,range.location);
  NSUInteger location = textView.selectedRange.location;
  NSString * textStr = textView.text;
  NSString resultStr = [NSString stringWithFormat:@"%@%@%@",[textStr substringToIndex:location],emoji,[textStr substringFromIndex:location]];
  textView.text = resultStr;
  range.location = range.location + [emoji length];
  NSLog(@"%zd=%zd+%zd",range.location,range.location,[emoji length]);
  textView.selectedRange = NSMakeRange(range.location,0);
  }
  /

• 光標位置刪除
  */

• (void)deleteString:(UITextView *)textView {
  NSRange range = textView.selectedRange;
  NSLog(@"%zd-表情刪除-%zd",range.length,range.location);
  if (textView.text.length > 0) {
  NSUInteger location = textView.selectedRange.location;
  NSString *head = [textView.text substringToIndex:location];
  if (range.length ==0) {

    }else{
        NSLog(@"文字為全選");
        textView.text =@"";
    }
  
    if (location > 0) {
        //            NSUInteger location  = self.inputView.toolBar.textView.selectedRange.location;
        NSMutableString *str = [NSMutableString stringWithFormat:@"%@",textView.text];
        [self lastRange:head];
        NSLog(@"%zd===%zd",[self lastRange:head].location,[self lastRange:head].length);
        NSLog(@"%@",str);
  
        [str deleteCharactersInRange:[self lastRange:head]];
  
        NSLog(@"%@",str);
        textView.text = str;
        textView.selectedRange = NSMakeRange([self lastRange:head].location,0);
  
    } else {
        textView.selectedRange = NSMakeRange(0,0);
    }
  

  }
  }

/**

• 計算選中的最后一個是字符還是表情所占長度
• @param str 要計算的字符串
• @return 返回一個 NSRange
  */

• (NSRange)lastRange:(NSString *)str {
  NSRange lastRange = [str rangeOfComposedCharacterSequenceAtIndex:str.length-1];
  return lastRange;
  }