从标签视图访问文本

Question

我的应用有一个搜索标签视图。它允许用户添加搜索标签以使搜索更容易。搜索标签视图全部完成。但是我在从标签访问文本并将它们编译在一起以制作一个大字符串时遇到问题。有人能帮我吗。这是代码。我从 github 获取了 repo 项目 rrtagcontroller 并对其进行了定制。我要做的就是从所有标签中获取文本并将它们放在一个大字符串中，以便我可以将数据传递给下一个视图控制器。

override func viewDidAppear(_ animated: Bool) {
    let tag = ["Macbookpro13inch"]

    RRTagController.displayTagControllerAsAChild(self, frame: CGRect(x: 0.0, y: 161.0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height - 161), tagsString: tag, blockFinish: { (selectedTags, unSelectedTags) -> () in
    }) { () -> () in
    }

}

  override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let vc = segue.destination
    vc.transitioningDelegate = transition
    vc.modalPresentationStyle = .custom

    if (segue.identifier == "ToHomeRoomDetailsViewController"){
        var destinationVC:HomeRoomDetailsViewController = segue.destination as! HomeRoomDetailsViewController


        destinationVC.HomeDescriptiontext = tagString

    }
}

Answer 1

根据 RRTagController 的 github 页面，这两个回调块将提供选定和未选定标签的列表，或者如果用户取消，则不提供任何内容。所以根据你的代码，你可以访问块中的标签如下：

RRTagController.displayTagControllerAsAChild(self, frame: CGRect(x: 0.0, y: 161.0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height - 161), tagsString: tag, blockFinish: { (selectedTags, unSelectedTags) -> () in

    //map the selectedTags into an array of strings
    let selectedTagsAsStrings = selectedTags.map { $0.textContent }

    //join the strings into one comma-separated string
    let tagString = selectedTagsAsStrings.joinWithSeparator(",")

    //do everything else with tagString
    //for e.g., store it locally
    self.tagString = tagString

}) { () -> () in
    //user did not select any tag, remember to handle this as well
}