[英]How to get access to variable from another class in swift?
我的UserSearchController中有一个searchBar :
class UserSearchController: UICollectionViewController, UICollectionViewDelegateFlowLayout,UISearchBarDelegate, UISearchDisplayDelegate {
lazy var searchBar: UISearchBar = {
let sb = UISearchBar()
sb.placeholder = "Search"
sb.barTintColor = UIColor.gray
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).backgroundColor = UIColor.rgb(red: 230, green: 230, blue: 230, alpha: 1)
sb.keyboardAppearance = .dark
sb.delegate = self
return sb
}()
我想从UserSearchCv中访问并隐藏该搜索栏:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let user = filteredUsers[indexPath.item]
print(user.username)
let userProfileController = UserProfileController(collectionViewLayout: UICollectionViewFlowLayout())
(superview?.next as? UIViewController)?.navigationController?.pushViewController(userProfileController, animated: true)
UserSearchController.searchBar.isHidden = true //Something like this but it compiles an error
}
您需要通过对象引用而不是类名称来访问该变量。 尝试这个-
userProfileController.searchBar.isHidden = true
你可以这样做,我在这里传递数组。 但是您可以根据需要传递任何变量类型。
ShareViewController
是您要推送的控制器,而arr_sticker
是您要传递的任何变量。 请记住,传递变量和分配变量类型都是相同的。
let SV = self.storyboard?.instantiateViewController(withIdentifier: "ShareViewController") as! ShareViewController
SV.arr_sticker = arrm_symbols
self.navigationController?.pushViewController(SV, animated: true)
在另一个控制器中,我像
var arr_sticker = NSArray()
在此控制器中,当您print
arr_sticker
值时,您可以获得从VC实际传递到此VC的值。
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