连续表情无法正常显示

[Jerry-Wang-Developer]

[smile][smile][smile][smile][smile][smile][smile][smile][smile][smile]

无法显示正常

[dadpp]

确实发现这个bug了

[huhood]

这个bug的问题，是因为下标计算错了 提供一下我修复好的算法

/**

• 解析字符串中url内容生成Run对象

• @param attributedString 内容

• @return TQRichTextRunURL对象数组
  */
• (NSArray *)runsForAttributedString:(NSMutableAttributedString *)attributedString
  {
  NSString *markL = @"[";
  NSString *markR = @"]";

NSString *string = [NSString stringWithString:attributedString.string];

NSMutableArray *array = [NSMutableArray array];
NSMutableArray *stack = [[NSMutableArray alloc] init];

for (int i = 0, index = 0; i < string.length; i++, index++)
{
NSString *s = [string substringWithRange:NSMakeRange(i, 1)];

if (([s isEqualToString:markL]) || ((stack.count > 0) && [stack[0] isEqualToString:markL]))
{
    if (([s isEqualToString:markL]) && ((stack.count > 0) && [stack[0] isEqualToString:markL]))
    {
        [stack removeAllObjects];
    }

    [stack addObject:s];

    //  检测到表情结束符后，进行提取表情
    if ([s isEqualToString:markR] || (i == string.length - 1))
    {
        NSMutableString *emojiStr = [[NSMutableString alloc] init];
        for (NSString *c in stack)
        {
            [emojiStr appendString:c];
        }

        if ([[TQRichTextRunEmoji emojiStringArray] containsObject:emojiStr])
        {
            NSRange range = NSMakeRange(index + 1 - emojiStr.length, emojiStr.length);

            [attributedString replaceCharactersInRange:range withString:@" "];

            TQRichTextRunEmoji *run = [[TQRichTextRunEmoji alloc] init];
            run.range    = NSMakeRange(index + 1 - emojiStr.length, 1);
            run.text     = emojiStr;
            run.drawSelf = YES;
            [run decorateToAttributedString:attributedString range:run.range];

            [array addObject:run];
        }

        index -= (stack.count - 1); // 此下标是计算表情被替换后的下标
        [stack removeAllObjects];
    }
}

}

return array;
}

[chyo]

刚Checkout下来的代码，发现几个问题：

1. 表情无法连续显示，解决方法：
   在+ (NSArray *)runsForAttributedString:(NSMutableAttributedString *)attributedString方法中修改

           if ([emojiTags containsObject:emojiStr])
           {
               NSRange range = NSMakeRange(i + 1 - emojiStr.length, emojiStr.length);
   
               [attributedString replaceCharactersInRange:range withString:@" "];
   
   
   
               TQRichTextRunEmoji *run = [[TQRichTextRunEmoji alloc] init];
               run.range    = NSMakeRange(i + 1 - emojiStr.length, 1);
               run.text     = emojiImageNames[[emojiTags indexOfObject:emojiStr]];
               run.drawSelf = YES;
               [run decorateToAttributedString:attributedString range:run.range];
   
               [array addObject:run];
   
               // 解决连续表情无法显示的问题
               i = i - emojiStr.length + 1;
           }
   

2. 文字颜色设置无效的问题：在TQRichTextView的- (void)drawRect:(CGRect)rect方法中，添加

           [attString addAttribute:(NSString *)kCTForegroundColorAttributeName value:(id)self.textColor.CGColor range:NSMakeRange(0,attString.length)];
   

3. 如果一行中，只有表情或者只有英文+表情，会导致表情高度不对被压缩的问题（中文文字占用高度比小写英文多，所以表情会正常）：

           if (richTextRun.drawSelf)
           {
               CGFloat runAscent,runDescent;
               CGFloat runWidth  = CTRunGetTypographicBounds(runRef, CFRangeMake(0,0), &runAscent, &runDescent, NULL);
               CGFloat runHeight = (lineAscent + lineDescent );
               CGFloat runPointX = runRect.origin.x + lineOrigin.x;
               CGFloat runPointY = lineOrigin.y ;
   
               // 解决如果只有表情没有文字，表情高度被压缩的问题
               CGRect runRectDraw = CGRectMake(runPointX, runPointY - 5, runWidth, runHeight);
               if (runRectDraw.size.height < runRectDraw.size.width) {
                   runRectDraw.size.height = runRectDraw.size.width;
               }
               [richTextRun drawRunWithRect:runRectDraw];
   
               [self.runRectDictionary setObject:richTextRun forKey:[NSValue valueWithCGRect:runRectDraw]];
       }
       else
       {
           if (richTextRun)
           {
               [self.runRectDictionary setObject:richTextRun forKey:[NSValue valueWithCGRect:runRect]];
           }
       }