iOS UIDocumentInteractionController

NSURL *urlPath = [kDocumentURL URLByAppendingPathComponent:@"qr.jpg"];

     self.documentController = [UIDocumentInteractionController interactionControllerWithURL:urlPath];

    [self.documentController presentOpenInMenuFromRect:self.view.bounds inView:self.view animated:YES];

相关链接：https://www.cnblogs.com/hero11223/p/7306104.html