Objective c 如何在其他应用程序（如ibooks）上打开pdf

我使用UIDocumentinteractioncontroller在其他应用程序（如ibook）上打开pdf

但是很难找到关于它的医生

现在我可以介绍开放的部分。但是当我点击ibooks的图标时。没有发生什么事

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我是否需要在委托中执行某些操作，例如documentInteractionController:willbegindingToApplication:？？？

首先，必须在.h文件中添加UIDocumentInteractionControllerDelegate

i、 e:

当然，您必须将UIDocumentInteractionController的委托设置为此模块。我是这样解决的：

-(BOOL)canOpenDocumentWithURL:(NSURL*)url inView:(UIView*)view {
    BOOL canOpen = NO;
    UIDocumentInteractionController* tmpDocController = [UIDocumentInteractionController 
                                                      interactionControllerWithURL:url];
    if (tmpDocController)
    {
        tmpDocController.delegate = self;
        canOpen = [tmpDocController presentOpenInMenuFromRect:CGRectZero
                                                    inView:self.view animated:NO];                   
        [tmpDocController dismissMenuAnimated:NO];
    }
    return canOpen;
}

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答案在下面的帖子里

- (void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(NSString *)application{
    NSLog(@"Send to App %@  ...", application);   
}

- (void)documentInteractionController:(UIDocumentInteractionController *)controller didEndSendingToApplication:(NSString *)application{
    NSLog(@"Finished sending to app %@  ...", application);   

}

- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller{
    NSLog(@"Bye");   

}

-(BOOL)canOpenDocumentWithURL:(NSURL*)url inView:(UIView*)view {
    BOOL canOpen = NO;
    UIDocumentInteractionController* tmpDocController = [UIDocumentInteractionController 
                                                      interactionControllerWithURL:url];
    if (tmpDocController)
    {
        tmpDocController.delegate = self;
        canOpen = [tmpDocController presentOpenInMenuFromRect:CGRectZero
                                                    inView:self.view animated:NO];                   
        [tmpDocController dismissMenuAnimated:NO];
    }
    return canOpen;
}