8共享扩展名显示共享图像问题

8共享扩展名显示共享图像问题

本文介绍了iOS 8共享扩展名显示共享图像问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在UIImageView中显示图像时遇到问题.

I have a problem with displaying image in my UIImageView.

这就是我在ShareViewController中获取图像的方式:

So this is how I get images in ShareViewController:

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    for (NSItemProvider* itemProvider in ((NSExtensionItem*)self.extensionContext.inputItems[0]).attachments )
    {
        if([itemProvider hasItemConformingToTypeIdentifier:@"public.image"])
        {
            ++counter;

            [itemProvider loadItemForTypeIdentifier:@"public.image" options:nil completionHandler:
             ^(id<NSSecureCoding> item, NSError *error)
             {
                 UIImage *sharedImage = nil;

                 if([(NSObject*)item isKindOfClass:[NSURL class]])
                 {
                     sharedImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:(NSURL*)item]];
                 }
                 if([(NSObject*)item isKindOfClass:[UIImage class]])
                 {
                     sharedImage = (UIImage*)item;
                 }
                 if ([(NSObject *)item isKindOfClass:[NSData class]])
                 {
                     sharedImage = [UIImage imageWithData:(NSData *)item];
                 }

                 [[NSNotificationCenter defaultCenter] postNotificationName:@"kNotificationDidLoadItem" object:sharedImage];
             }];
        }
    }
}

这是我在DetailsViewController中接收通知的方式:

this is how I receive notification in DetailsViewController:

- (void)didLoadSharedImage:(NSNotification *)notification {

    UIImage *sharedImage = [notification object];
    [self.sharedImages addObject:sharedImage];

    if (!self.theImageView.image) {

        self.theImageView.image = sharedImage;
    }
}

因此,此方法后没有可见的图像.我调试了它,然后看到了那个图像,但是奇怪的是,当我从DetailsViewController推送新的视图控制器然后又弹出时看到了它.只有这样,UIImageView才好像刷新了自己.

So there is no visible image after this method. I debugged it and I saw that image is there, but it's strange that I see it when I push new view controller form DetailsViewController and then pop back. Only then UIImageView seems like refresh its self.

推荐答案

您是否尝试将didLoadSharedImage执行到UIThread中.像

Did you try to execute didLoadSharedImage into UIThread. like

dispatch_async(dispatch_get_main_queue(), ^{
          if (!self.theImageView.image) {
          self.theImageView.image = sharedImage;
          }
})

祝你好运

这篇关于iOS 8共享扩展名显示共享图像问题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-25 14:15