Question

当我点击搜索按钮（如Twitter应用中的搜索按钮）时，如何在导航栏中展开我的搜索栏？现在我的搜索栏刚好落在导航栏的顶部。这是我单击导航栏中的搜索按钮时调用的函数：

func searchbuttonclicked(sender: UIBarButtonItem) {
    var searchresults = storyboard?.instantiateViewControllerWithIdentifier("searchresults") as searchResultsController

    var searchcontroller = UISearchController(searchResultsController: searchresults)
    searchcontroller.hidesNavigationBarDuringPresentation = false
    searchcontroller.searchResultsUpdater = searchresults
    searchcontroller.modalTransitionStyle = .CrossDissolve

    presentViewController(searchcontroller, animated: true, completion: nil)
}

Answer 1

从this answer开始，您可以使用以下内容：

// declare as property
var searchBar: UISearchBar!

// in viewDidLoad
searchBar = UISearchBar(frame: CGRectMake(0.0, -80.0, 320.0, 44.0))
navigationController?.navigationBar.addSubview(searchBar)

// in action to show
searchBar.frame = CGRectMake(0.0, 0, 320, 44)

// in viewWillDisappear
searchBar.removeFromSuperview()

但是，searchBar上的UISearchController属性是只读的，因此您需要子类化UISearchController以使其使用导航控制器中的搜索栏而不是它默认呈现。

搜索栏从iphone上的“搜索”按钮展开

1 个答案: