CoreText实现图文混排和点击事件(3)

        CGFloat lineAscent;
        CGFloat lineDescent;
        CGFloat lineLeading;
        //获取每行的宽度和高度
        CTLineGetTypographicBounds(line, &lineAscent, &lineDescent, &lineLeading);
        NSLog(@"ascent = %f,descent = %f,leading = %f",lineAscent,lineDescent,lineLeading);
        //获取每个CTRun
        CFArrayRef runs = CTLineGetGlyphRuns(line);
        NSLog(@"run count = %ld",CFArrayGetCount(runs));
        for (int j = 0; j < CFArrayGetCount(runs); j++) {
            CGFloat runAscent;
            CGFloat runDescent;
            CGPoint lineOrigin = lineOrigins[i];
            //获取每个CTRun
            CTRunRef run = CFArrayGetValueAtIndex(runs, j);
            NSDictionary* attributes = (NSDictionary*)CTRunGetAttributes(run);
            CGRect runRect;
            //调整CTRun的rect
            runRect.size.width = CTRunGetTypographicBounds(run, CFRangeMake(0,0), &runAscent, &runDescent, NULL);
            NSLog(@"width = %f",runRect.size.width);
           
            runRect=CGRectMake(lineOrigin.x + CTLineGetOffsetForStringIndex(line, CTRunGetStringRange(run).location, NULL), lineOrigin.y - runDescent, runRect.size.width, runAscent + runDescent);
           
            NSString *imageName = [attributes objectForKey:@"imageName"];
            //图片渲染逻辑，把需要被图片替换的字符位置画上图片
            if (imageName) {
                UIImage *image = [UIImage imageNamed:imageName];
                if (image) {