Swift 按“将数据快速传输到第一个视图”;“后退”;按钮
朋友们好。导航控制到第二个屏幕。我得走了 到第二个屏幕上有按钮(SonuclarıListele)的一个屏幕,我必须 将第一个屏幕上的数字设置为“2” 第一视图Swift 按“将数据快速传输到第一个视图”;“后退”;按钮,swift,uinavigationcontroller,Swift,Uinavigationcontroller,朋友们好。导航控制到第二个屏幕。我得走了 到第二个屏幕上有按钮(SonuclarıListele)的一个屏幕,我必须 将第一个屏幕上的数字设置为“2” 第一视图 class KonularViewController: UIViewController { var number : Int? @IBAction func barButtonKonuEkle(_ sender: Any) { let childViewController = storybo
class KonularViewController: UIViewController {
var number : Int?
@IBAction func barButtonKonuEkle(_ sender: Any) {
let childViewController = storyboard?.instantiateViewController(withIdentifier: "KonuEkleViewController") as! KonuEkleViewController
navigationController?.pushViewController(childViewController, animated: true)
}
}
第二视图
class AramaViewController: UIViewController {
@IBOutlet weak var btn1: UIButton!
@IBOutlet weak var btn2: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
btn1.isSelected = true
}
@IBAction func btnListele(_ sender: Any) {
//First View "Number" variable on the first screen will be 2
}
@IBAction func btn_box(sender: UIButton) {
if sender.titleLabel?.text == "En Yeniler"
{
btn1.isSelected = true
btn2.isSelected = false
}
else
{
btn2.isSelected = true
btn1.isSelected = false
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
一个策略是拥有一个第三级的模型,它可以保持状态
class Model {
static let shared = Model()
var count: Int = 1
}
class AramaViewController: UIViewController {
@IBAction fund btnListele(_ sender: Any) {
Model.shared.count += 1
//First View "Number" variable on the first screen will be 2
}
class KonularViewController: UIViewController {
override func viewWillAppear(animated:Bool) {
super.viewWillAppear(animated: animated)
numberView.text = "\(Model.shared.count)" //display your number here
}
}
另一种选择
在导航控制器视图控制器阵列中返回到上一个视图并设置属性。这有点脆弱
class KonularViewController: UIViewController {
var count: Int = 1
override func viewWillAppear(animated:Bool) {
super.viewWillAppear(animated: animated)
numberView.text = "\(count)" //display your number here
}
}
class AramaViewController: UIViewController {
@IBAction fund btnListele(_ sender: Any) {
let numberOfViews = navigationController.viewControllers.count
if count > 1, let previousViewController = self.navigationController.viewControllers[numberOfViews-2] as? KonularViewController
previousViewController.count += 1
//First View "Number" variable on the first screen will be 2
}
假设KonularViewController标识符为“KonularViewController”。 在AramaViewController中:
@IBAction func btnListele(_ sender: Any) {
//First View "Number" variable on the first screen will be 2
let konularViewController = storyboard?.instantiateViewController(withIdentifier: "KonularViewController") as! KonularViewController
konularViewController.number = 2
navigationController?.pushViewController(childViewController, animated: true)
}
我看不出你的观点中有什么数字,你想要实现什么有点困惑。如果要在推送UIViewController之前增加数字,只需在推送之前增加数字即可。在调用
AramaViewController
的btnListele
时,是否要将FirstViewController的number
设置为2?