未调用ios 8完成块

Question

在我的应用程序中,我使用TTOpenInAppActivity在UIActivityController中插入"Open in"动作.里面它的工作原理如下:

一些视图控制器呈现UIActivityController,内置TTOpenInActivity.

-(void)openWithAction
{
    NSURL *fileURL = SOME_URL;
    CGRect rect = SOME_RECT;
    TTOpenInAppActivity *openInAppActivity = [[TTOpenInAppActivity alloc] initWithView:self.view andRect:rect];
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[fileURL] applicationActivities:@[openInAppActivity]];

    if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone){
        // Store reference to superview (UIActionSheet) to allow dismissal
        openInAppActivity.superViewController = activityViewController;
        // Show UIActivityViewController
        [self presentViewController:activityViewController animated:YES completion:NULL];
    } else {
        // code for iPad, irrelevant
    }
}

当用户点击"打开"按钮时,将触发以下方法:

- (void)performActivity
{
    if(!self.superViewController){
        [self activityDidFinish:YES];
        return;
    }

    // Dismiss activity view
    if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone){
        // iPhone dismiss UIActivityViewController
        [self.superViewController dismissViewControllerAnimated:YES completion:^(void){

            if (self.fileURLs.count > 1) {
                [self openSelectFileActionSheet];
            }
            else {
                // Open UIDocumentInteractionController
                [self openDocumentInteractionControllerWithFileURL:self.fileURLs.lastObject];
            }
        }];
    } else {
        // code for iPad, irrelevant
        }
    }
}

由于该应用仅适用于iPhone,因此应执行以下代码:

[self.superViewController dismissViewControllerAnimated:YES completion:^(void){

                if (self.fileURLs.count > 1) {
                    [self openSelectFileActionSheet];
                }
                else {
                    // Open UIDocumentInteractionController
                    [self openDocumentInteractionControllerWithFileURL:self.fileURLs.lastObject];
                }
}];

在iOS7中一切正常.在iOS8中,UIActivityController被解雇,然后没有任何反应.在调试时我确实设法检测到iOS8中的完成处理程序从未被调用过.

请帮助我找出这种行为的原因并使其正常工作.

先感谢您.

Answer 1

在iOS 8中,当您点击"打开"时,UIActivityViewController会自动被解除.因此,当您调用时self.superViewController dismissViewControllerAnimated:completion:,viewController已被解除,方法不执行任何操作(因此未完成调用).