,但它不是叫我scrollViewDidScroll
方法我scrollViewDidScroll功能不接受我试图检查用户是否上下滚动我的应用程序调用
任何想法,为什么它不打印received scroll
当我上下滚动下来的应用程序?
import UIKit
class CreateAccount: UIViewController, UITextFieldDelegate, UIScrollViewDelegate {
@IBOutlet weak var scrollViewer: UIScrollView!
@IBOutlet weak var usernameTextField: UITextField!
@IBOutlet weak var emailTextField: UITextField!
@IBOutlet weak var passwordTextField: UITextField!
@IBOutlet weak var reenterPasswordTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func scrollViewDidScroll(scrollView: UIScrollView) {
print("received scroll")
}
}
你没有设置滚动视图的代表 –