xcode 在操作时激活 UISearchController 时出现错误“应用程序试图在其自身上显示模态视图控制器”
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Error "Application tried to present modal view controller on itself" while activating UISearchController on action
提问by Bart?omiej Semańczyk
In my code this is how I setup UISearchController:
在我的代码中，这是我设置的方式UISearchController：
searchResultController = storyboard!.instantiateViewControllerWithIdentifier(DBSearchResultControllerIdentifier) as! DBSearchResultController
searchController = UISearchController(searchResultsController: searchResultController)
searchController.searchResultsUpdater = self
searchController.delegate = self
searchResultController.tableView.tableHeaderView = searchController.searchBar
on some action all I do is:
在某些行动中，我所做的就是：
@IBAction func cityButtonTapped(sender: UIButton) {
searchController.active = true
}
But then I have an error:
但后来我有一个错误：
Application tried to present modal view controller on itself. Presenting controller is
UISearchController: 0x7f9a0c04a6a0
应用程序试图在自身上呈现模态视图控制器。呈现控制器是
UISearchController: 0x7f9a0c04a6a0
回答by paresh
The apple documentation for UISearchControllerclearly says the following things:
苹果文档UISearchController清楚地说明了以下几点：
- Setting
activeproperty to YES performs a default presentation of the search controller. - Set the
searchResultsControllerparameter tonilto display the search results in the same view that you are searching.
- 将
active属性设置为 YES 执行搜索控制器的默认呈现。 - 将
searchResultsController参数设置为nil在您正在搜索的同一视图中显示搜索结果。
So it looks like you are using your current view controller itself as your searchResultsControllerand hence when you try to set activeto YES, it tries to modally present the your current view on itself and hence the error.
因此，看起来您正在使用当前视图控制器本身作为您的视图控制器searchResultsController，因此当您尝试设置active为 YES 时，它会尝试以模态方式呈现您当前的视图本身，从而导致错误。
