UIDocumentInteractionController打开菜单取消回调 [英] UIDocumentInteractionController Open Menu Cancelled Callback

问题描述

我目前正在开发一个专门用于iOS7的应用程序，该应用程序使用菜单中打开的UIDocumentInteractionController，并需要一种方法，当用户取消并不选择可用选项时通知我。

UIDocumentInteractionControllerDelegate提供：

   - （void）documentInteractionControllerDidDismissOptionsMenu：（UIDocumentInteractionController *）controller 
  
 
 
 
，但这并不指定用户是否点击了其中一个可用选项或取消。
 
 
 
任何想法？
解决方案
 注意：这不适用于iOS 8 > 
 
 
 
要确定用户是否取消了菜单或选择了某个选项，必须使用以下委派方法：
 
 
 
 
 1- 
   - （void）documentInteractionController：（UIDocumentInteractionController *）controller 
 didEndSendingToApplication：（NSString *）application 
 {
 //仅当用户选择一个选项然后调用委托方法时才调用
 // Set flag here _isOptionSelected = YES; 
 _isOptionSelected = YES; 
} 
  
 2- 
 
   - （void）documentInteractionControllerDidDismissOpenInMenu：（UIDocumentInteractionController *）controller 
 {
 //调用用户是否选择了选项
检查您的标志
 if（_isOptionSelected == NO）{
 //用户已取消菜单
} 
 _isOptionSelected = NO; 
} 
  
  iOS 8  
 
 
 
对于iOS 8及以上版本，使用此方法代替步骤2中的方法：
  （void）documentInteractionController：（UIDocumentInteractionController *）controller 
 didEndSendingToApplication：（NSString *）application 
  
 
I am currently developing an application specifically for iOS7 that utilizes UIDocumentInteractionController open in menu and need a method that notifies me when a user cancels and does not choose an available option.

UIDocumentInteractionControllerDelegate offers:
- (void)documentInteractionControllerDidDismissOptionsMenu:(UIDocumentInteractionController *) controller
but this does not specify whether the user tapped one of the available options or cancel.

Any ideas?
解决方案
 NOTE: This will not work for iOS 8 anymore, only iOS7 and earlier

To determine whether the user has canceled the menu or selected an option, you have to make use of the following delegate methods:
 

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 

For iOS 8 and above, use this method instead of the one in step 2:
- (void)documentInteractionController:(UIDocumentInteractionController *)controller
           didEndSendingToApplication:(NSString *)application


                        
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