Question

请帮助我！

我从Parse.com下载图像：

self.images = [[NSMutableArray alloc] init];
PFImageView *creature = [[PFImageView alloc] init];
PFQuery *query = [PFQuery queryWithClassName:@"SubCatergory"];
[query findObjectsInBackgroundWithBlock:^(NSArray *comments, NSError *error) {

    for (PFObject *comment in comments) {

        PFFile *file = [comment objectForKey:@"imageFile"];
        creature.file = file;
        creature.frame = CGRectMake(0, 0, 100, 100);
        // creature.userInteractionEnabled =YES;
        [creature loadInBackground];

        //[self.images addObject:creature];

           [self.images addObject: creature];

    }


}];

将这些放在iCarousel中：

-(UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{    

        PFImageView* img = [self.images objectAtIndex:index];
        PFImageView* imgView = [[PFImageView alloc] initWithImage:img];
        return img;

}

随着本地图像工作iCarousel罚款。我设置了委托和数据源。我的图像数组的内容是这样的：

＆gt;”中， “

我收到了错误：

[PFImageView length]：无法识别的选择器发送到实例0xf40e9d0

Answer 1

这是一个老问题，我认为您已经发现代码存在问题。简而言之，如果仔细观察：

PFImageView* img = [self.images objectAtIndex:index];
PFImageView* imgView = [[PFImageView alloc] initWithImage:img];

您正在使用img，当您致电UIImageView时，这实际上是UIImage派生类，而不是initWithImage。

这解释了你的崩溃。您可以安全地从[self.images objectAtIndex:index]方法返回carousel:viewForItemAtIndex:：

-(UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view {

  return [self.images objectAtIndex:index];
}

Answer 2

我希望它会帮助你，

self.images = [[NSMutableArray alloc] init];
PFQuery *query = [PFQuery queryWithClassName:@"SubCatergory"];
[query findObjectsInBackgroundWithBlock:^(NSArray *comments, NSError *error) {

    for (PFObject *comment in comments) {
      PFFile *post = [comment objectForKey:@"imageFile"];
      [self.images addObject:post]; } 
    }];


-(UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view {
          AsyncImageView *imageasy=[[AsyncImageView alloc] init];   
               [imageasy setImageURL:[NSURL URLWithString:[post url]]];
  return imageasy.image;
}

从Parse.com下载图像并将其用于iCarousel

2 个答案: