iPhone SDK - 从 RSS feed 解析 XML 时出现问题

Question

我制作了一个 RSS 阅读器，可以从 blogspot 获取提要。故事、标题等文字效果很好。但提要中发布的图像显示为链接而不是图像。如何显示图像？

Answer 1

这是我用来动态下载图像到列表中的一些代码:

//starts the downloading of the image
- (void) downloadImage
{
    [NSThread detachNewThreadSelector:@selector(imageDownloadWorker:) 
                             toTarget:self 
                           withObject:[self getAvatarUrl]/*here goes your url*/];
}

//does something with the image once loaded
- (void)imageLoaded:(UIImage *)image
{   
    //do something
}

//downloads the image
- (void)imageDownloadWorker:(NSString *)urlString
{
    NSAutoreleasePool *pool  = [[NSAutoreleasePool alloc] init];
    NSURL             *url   = [NSURL URLWithString:urlString];
    NSData            *data  = [NSData dataWithContentsOfURL:url];
    UIImage           *image = [[UIImage alloc] initWithData:data];

    [self performSelectorOnMainThread:@selector(imageLoaded:) 
                           withObject:[image autorelease]
                        waitUntilDone:YES];
    [pool drain];
}

希望对你有帮助，祝你好运!