iOS App开发中扩展RCLabel组件进行基于HTML的文本布局

                        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
                            if (tempURL) {
                                NSData * data = [YHBaseData getDataWithUrl:tempURL];
                                if (data) {
                                //获取完成后村缓存
                                    //做缓存
                                    [[YHBaseCecheCenter sharedTheSingletion]writeCecheFile:data withFileID:tempURL toPath:YHBaseCecheImage];
                                    //赋值 回调代理
                                    UIImage * tempImg = [UIImage imageWithData:data];
                                    component.img=tempImg;
                                    //这里代理是我添加的，当图片下载完成后 通知视图重新排版
                                    if ([[rcLabel imageDelegate]respondsToSelector:@selector(YHRTLabelImageSuccess:)]) {
                                        //在主线程中执行回调