ios - 过滤 UIDocumentInteractionController 建议打开方式的应用程序

Question

是否可以管理 UIDocumentInteractionController 将显示用于打开我的文件的应用程序列表？实际上，我需要创建应用程序的黑名单和白名单。 我看了一下 UIDocumentInteractionControllerDelegate 但它不包含所需的方法..只有
- (void) documentInteractionController: (UIDocumentInteractionController *) Controller willBeginSendingToApplication: (NSString *) application

我需要类似的东西

-(BOOL)shouldPresentForOpenInApplication: (NSString *)

Answer 1

其实我想出了怎么做。这有点像把戏，但它确实有效。您需要做的就是实现委托(delegate)的方法，就像这样

- (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];
    }
}

以及我们通过替换错误 url 来欺骗文档 Controller 的实际方法。

-(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];
}