小编Mr.*_*ian的帖子

我在我的iOS应用程序中使用了hpple解析库.https://github.com/topfunky/hpple

我有一个问题,解析器没有正确解析我在iOS 7上的HTML页面.它在iOS 6上正确解析,我得到返回的对象.在iOS 7上,我只返回部分解析和错误解析.该库错误地读取iOS 7上的HTML.我已经尝试调试问题,并得出结论问题在于此方法.

NSArray *PerformXPathQuery(xmlDocPtr doc, NSString *query)
{
  xmlXPathContextPtr xpathCtx;
  xmlXPathObjectPtr xpathObj;

  /* Create xpath evaluation context */
  xpathCtx = xmlXPathNewContext(doc);
  if(xpathCtx == NULL)
    {
      //NSLog(@"Unable to create XPath context.");
      return nil;
    }

  /* Evaluate xpath expression */
  xpathObj = xmlXPathEvalExpression((xmlChar *)[query cStringUsingEncoding:NSUTF8StringEncoding], xpathCtx);
  if(xpathObj == NULL) {
    //NSLog(@"Unable to evaluate XPath.");
    xmlXPathFreeContext(xpathCtx);
    return nil;
  }

  xmlNodeSetPtr nodes = xpathObj->nodesetval;
  if (!nodes)
    {
      //NSLog(@"Nodes was nil.");
      xmlXPathFreeObject(xpathObj);
      xmlXPathFreeContext(xpathCtx);
      return nil;
    }

  NSMutableArray *resultNodes = [NSMutableArray …

是否可以像iOS 7中的通知中心中的箭头一样进行实时混合？我想知道UIImage是否可以在柔和的光线下使用内容(UIView或CALayer),因此背景图像可以移动,混合图像可以保留在一个位置.

我想让它成为你可以拥有UIImage的地方,你可以将blendMode属性设置为你需要的任何混合模式,例如, imageView.blendMode = kCGBlendModeSoftLight;

我尝试使用GPUImage,但我无法弄清楚如何做我需要的东西.任何帮助,将不胜感激.

到目前为止,我用来设置UIImage的混合模式的代码是这样的; 但是,如果移动背景视图,则不会更新UIImage上的混合.

    //blur the background
    GPUImageGaussianBlurFilter *blurFilter = [[GPUImageGaussianBlurFilter alloc] init];
    blurFilter.blurRadiusInPixels = 50.0f;
    blurFilter.blurPasses = 4;
    UIImage *blurredBackground = [blurFilter imageByFilteringImage:[UIImage imageNamed:@"Background.png"]];

    //make the blended images
    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 2.0f);
    CGContextSetInterpolationQuality(UIGraphicsGetCurrentContext(), kCGInterpolationHigh);
    [blurredBackground drawInRect:self.view.bounds blendMode:kCGBlendModeNormal alpha:1.0];

    [[UIImage imageNamed:@"BarLineImage.png"] drawInRect:CGRectMake(0, self.view.bounds.size.height - 31, self.view.bounds.size.width, 1) blendMode:kCGBlendModeSoftLight alpha:1.0];

    [[UIImage imageNamed:@"Equalizer-th.png"] drawInRect:CGRectMake(65, self.view.bounds.size.height - 30, 30, 30) blendMode:kCGBlendModeSoftLight alpha:1.0];
    [[UIImage imageNamed:@"Player-th.png"] drawInRect:CGRectMake(145, self.view.bounds.size.height - 30, 30, 30) blendMode:kCGBlendModeSoftLight alpha:1.0];
    [[UIImage imageNamed:@"Container-th.png"] drawInRect:CGRectMake(225, self.view.bounds.size.height - …