图文混排的数据处理

最近项目需要做内容的评论,其中有要求做图文混排的处理,找了许多资料结合实际做了一些总结，这里贴出部分实现代码，希望可以帮助有需要的小伙伴。

#define BEGIN_FLAG @"["

#define END_FLAG @"]"
-(void)getImageRange:(NSString*)message : (NSMutableArray*)array {
    NSRange range=[message rangeOfString: BEGIN_FLAG];
    NSRange range1=[message rangeOfString: END_FLAG];
    //判断当前字符串是否还有表情的标志。
    if (range.length && range1.length) {
        if (range.location>0) {
            [array addObject:[message substringToIndex:range.location]];
            [array addObject:[message substringWithRange:NSMakeRange(range.location, range1.location+1-range.location)]];
            NSString *str=[message substringFromIndex:range1.location+1];
            [self getImageRange:str :array];
        }else {
            NSString *nextstr=[message substringWithRange:NSMakeRange(range.location, range1.location+1-range.location)];
            //排除文字是“”的
            if (![nextstr isEqualToString:@""]) {
                [array addObject:nextstr];
                NSString *str=[message substringFromIndex:range1.location+1];
                [self getImageRange:str :array];
            }else {
                return;
            }
        }
        
    }else {
        if (message != nil) {
            [array addObject:message];
        }
        
    }
}

#define KFacialSizeWidth  24
#define KFacialSizeHeight 24
#define MAX_WIDTH 240
-(UIView *)assembleMessageAtIndex : (NSString *) message
{
    NSMutableArray *array = [[NSMutableArray alloc] init];
    [self getImageRange:message :array];
    UIView *returnView = [[UIView alloc] initWithFrame:CGRectZero];
    NSArray *data = array;
    UIFont *fon = [UIFont systemFontOfSize:14.0f];
    CGFloat upX = 0;
    CGFloat upY = 0;
    if (data) {
        for (int i=0;i<[data count];i++) {
            NSString *str=[data objectAtIndex:i];
            if ([str hasPrefix: BEGIN_FLAG]&&[str hasSuffix: END_FLAG])
            {
                if (upX > MAX_WIDTH)
                {
                    upY = upY + KFacialSizeHeight;
                    upX = 0;
                }
                NSString *imageName=[str substringWithRange:NSMakeRange(1, str.length - 2)];
                UIImageView *img=[[UIImageView alloc]initWithImage:[UIImage imageNamed:imageName]];
                img.frame = CGRectMake(upX, upY, KFacialSizeWidth, KFacialSizeHeight);
                [returnView addSubview:img];
                upX=KFacialSizeWidth+upX;
                
            } else {
                for (int j = 0; j < [str length]; j++) {
                    NSString *temp = [str substringWithRange:NSMakeRange(j, 1)];
                    if (upX > MAX_WIDTH)
                    {
                        upY = upY + KFacialSizeHeight;
                        upX = 0;
                    }
                    CGSize size=[temp sizeWithFont:fon constrainedToSize:CGSizeMake(320, 40)];
                    UILabel *la = [[UILabel alloc] initWithFrame:CGRectMake(upX,upY,size.width,size.height)];
                    la.font = fon;
                    la.text = temp;
                    [returnView addSubview:la];
                    upX=upX+size.width;
                }
            }
        }
    }
    returnView.frame = CGRectMake(0, 400, upX, upY); //@ 需要将该view的尺寸记下，方便以后使用
    return returnView;
}