UIDocumentInteractionController打开菜单取消回调

Question

我目前正在开发一个专门针对iOS7的应用程序，它在菜单中打开了UIDocumentInteractionController，需要一个方法，当用户取消并且不选择可用选项时通知我。

UIDocumentInteractionControllerDelegate提供：

- (void)documentInteractionControllerDidDismissOptionsMenu:(UIDocumentInteractionController *) controller

但这并未指定用户是否点按了其中一个可用选项或取消。

有什么想法吗？

Answer 1

注意：这不再适用于iOS 8，仅适用于iOS7及更早版本

要确定用户是否已取消菜单或选择了某个选项，您必须使用以下委托方法：

1-

- (void)documentInteractionController:(UIDocumentInteractionController *)controller
           didEndSendingToApplication:(NSString *)application
{
    //get called only when the user selected an option and then the delegate method bellow get called
    // Set flag here _isOptionSelected = YES;
    _isOptionSelected = YES;
}

2-

- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller
{
    //called whether the user has selected option or not
    // check your flag here 
    if(_isOptionSelected == NO) {
        //the user has canceled the menu
     }
    _isOptionSelected = NO;
}

iOS 8

对于iOS 8及更高版本，请使用此方法代替步骤2中的方法：

- (void)documentInteractionController:(UIDocumentInteractionController *)controller
           didEndSendingToApplication:(NSString *)application

Answer 2

这适用于iOS7＆amp;＆amp; iOS8上

BOOL didSelectOptionFromDocumentController = NO;//**set this to "NO" every time you present your documentInteractionController too

-(void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(NSString *)application {
    didSelectOptionFromDocumentController = YES;
}


-(void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller {
    if (didSelectOptionFromDocumentController == NO) {//user cancelled.

    }
}

Answer 3

这适用于iOS8＆amp;适用于第三方应用和系统应用的iOS9！

它不漂亮但它有效。

有谁能告诉我这是否会通过App Review？不确定，因为我指的是不可公开访问的类名（_UIDocumentActivityViewController）。 这是Swift 2.2！

NSObject Extension获取类名的字符串：

./configure --prefix=/usr/local/imagemagick/ -with-java-home=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.38.x86_64/

您从以下位置调用UIDocumentInteractionController的Viewcontroller：

extension NSObject {
    var theClassName: String {
        return NSStringFromClass(self.dynamicType)
    }
}

Answer 4

对于Swift 4，请使用：

 func documentInteractionControllerDidDismissOpenInMenu(_ controller: UIDocumentInteractionController) {

        // this function get called when users finish their work, 
        // either for sharing thing within the same app or exit to other app will do
 }

我在用户将图像分享到Facebook和Instagram后使用它。