触摸ui按钮，打开带有URL参考方案的注释记号

Question

这可能吗？我试过下面的代码，但无法编译：

- (IBAction)KeynoteButton:(id)sender {
    UIDocumentInteractionController *controller = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:@"2bm iPad presentation.key"]];
    self.controller.delegate = self;
    CGRect navRect = self.view.frame;
    [self.controller presentOptionsMenuFromRect:navRect inView:self.view animated:YES];
}
#pragma mark - UIDocumentInteractionControllerDelegate
//===================================================================
- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller
{
    return self;
}
- (UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller
{
    return self.view;
}
- (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller
{
    return self.view.frame;
}

它在self.controller上崩溃，因为它不是属性。

有什么想法吗？

Answer 1

我想你需要去掉"self."。因为控制器是一个局部变量。