iOS 共享扩展未显示我的自定义 ShareViewController

Question

我似乎无法展示我的自定义 ShareViewController。我继承了 UIViewController，而不是 SLComposeViewController，将它添加到 Storyboard，但是当我选择要共享的图像时，ShareViewController 不显示。这是我的完整代码：

头文件：

#import <UIKit/UIKit.h>
#import <Social/Social.h>

@interface ShareViewController : UIViewController

@end

实现文件：

@implementation ShareViewController

- (void)viewDidLoad{
    [super viewDidLoad];
    self.view.alpha = 0;

}

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

    self.view.transform = CGAffineTransformMakeTranslation(0, self.view.frame.size.height);
    [UIView animateWithDuration:0.25 animations:^
     {
         self.view.transform = CGAffineTransformIdentity;
     }];
}

- (void)dismiss
{
    [UIView animateWithDuration:0.20 animations:^
     {
         self.view.transform = CGAffineTransformMakeTranslation(0, self.view.frame.size.height);
     }
                     completion:^(BOOL finished)
     {
         [self.extensionContext completeRequestReturningItems:nil completionHandler:nil];
     }];
}

-(void)viewDidAppear:(BOOL)animated {

    [super viewDidAppear:YES];

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

@end

Breakpoint 表示运行时确实执行代码，甚至抓取图像，但由于某种原因没有呈现自定义视图控制器。有什么帮助吗？

Answer 1

这太愚蠢了，我花了一段时间才弄明白，但由于某种原因，默认情况下，自定义 ShareViewController 视图的背景颜色设置为 [UIColor clearColor]。非常愚蠢的苹果:)，但我解决了这个案子