iOS 怎样通过图片网址判断是不是空白图片

Question

 NSDictionary *dic = [self.dataArray objectAtIndex:[indexPath row]];
    //头像
    NSString *headPath = [dic objectForKey:@"ownerimgurl"];
    UIWebView *ownerHeadView = [[UIWebView alloc]initWithFrame:CGRectMake(10,10,60,60)];
    ownerHeadView.scalesPageToFit=YES;
    NSURL *headViewUrl = [NSURL URLWithString:headPath];
    NSData *headData = [NSData dataWithContentsOfURL:headViewUrl];
    UIImage *image = [UIImage imageWithData:headData];
    if (image == nil) {
        UIImageView *headView = [[UIImageView alloc]initWithFrame:CGRectMake(10,10,60,60)];
        headView.image = [UIImage imageNamed:@"user_head_img"];
        [cell.contentView addSubview:headView];
        [headView release];
    }
    else {
        NSURLRequest *requestHead = [NSURLRequest requestWithURL:headViewUrl];
        [ownerHeadView loadRequest:requestHead];
        [cell.contentView addSubview:ownerHeadView];
    }
    [ownerHeadView release];
    ownerHeadView = nil;
为什么只走image == nil这一步

Answer 1

image不能这样判断吧？直接if（image），或者拿headData这个来判断试试

Answer 2

我的代码里有判断好不好，直接从svn下载最新的不就好了……
肯定是有人把我的demo泄漏了