過濾UIDocumentInteractionController建議打開的應用程序

Question

是否有可能管理UIDocumentInteractionController將用於打開我的文件的應用程序列表？其實，我需要創建黑白名單的應用程序。 我看了看UIDocumentInteractionControllerDelegate，但它不包含所需的methods..only
- (void) documentInteractionController: (UIDocumentInteractionController *) controller willBeginSendingToApplication: (NSString *) application

，我需要這樣的東西

-(BOOL)shouldPresentForOpenInApplication: (NSString *)

Answer 1

其實我想通了，如何做到這一點。 這有點像一個技巧，但它的工作原理。 所有你需要做的是落實委託的方法，像這樣

- (void) documentInteractionController: (UIDocumentInteractionController *) controller willBeginSendingToApplication: (NSString *) application { 
    BOOL isAppAllowed = YES; 
    // Make a decision based on app bundle identifier whether to open it or not 
    if (isAppAllowed) { 
     dispatch_async(dispatch_get_main_queue(), ^{ 
      [self showRejectionMessage]; 
     }); 
     [self stopSendingFileUsingDocController:controller toApplication:application]; 
    } 
} 

和我們欺騙代不良網址的文檔控制的實際方法。

-(void)stopSendingFileUsingDocController:(UIDocumentInteractionController *)controller toApplication:(NSString *)application 
{ 
    NSURL *documentURL = controller.URL; 
    NSString *filePath = [documentURL path]; 
    filePath = [filePath stringByDeletingLastPathComponent]; 
    NSString *filename = [filePath lastPathComponent]; 
    NSMutableString *carets = [NSMutableString string]; 
    for (NSUInteger i = 0; i < [filename length]; i++) 
    { 
     [carets appendString:@"^"]; 
    } 

#ifndef __clang_analyzer__ 
    filePath = [filePath stringByAppendingPathComponent:carets]; 
    NSURL *newURL = [[NSURL alloc] initFileURLWithPath:filePath]; 
    controller.URL = newURL; 
#endif 
    [self documentInteractionController:controller didEndSendingToApplication:application]; 
}