小编Mar*_*n Q的帖子

在我的代码中,我有一个UITextField,当用户点击时打开一个UIDatePicker,使用户能够轻松有效地滚动到他们的出生日期.显然,我们不希望UIDatePicker像目前那样向上滚动到2015年及以上.因为它是出生日期输入字段,我还需要能够将条目限制为16年+.我该怎么做呢？

class SignUpViewController: UIViewController, UITextFieldDelegate {

    var datePicker:UIDatePicker!

    @IBOutlet weak var dateTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        // UI DATE PICKER SETUP

        var customView:UIView = UIView(frame: CGRectMake(0, 100, 320, 160))
        customView.backgroundColor = UIColor.clearColor()

        datePicker = UIDatePicker(frame: CGRectMake(0, 0, 320, 160))
        datePicker.datePickerMode = UIDatePickerMode.Date

        customView.addSubview(datePicker)
        dateTextField.inputView = customView
        var doneButton:UIButton = UIButton (frame: CGRectMake(100, 100, 100, 44))
        doneButton.setTitle("Done", forState: UIControlState.Normal)
        doneButton.addTarget(self, action: "datePickerSelected", forControlEvents: UIControlEvents.TouchUpInside)
        doneButton.backgroundColor = UIColor .grayColor()
        dateTextField.inputAccessoryView = doneButton

在最近更新Xcode之后,以前工作的代码不再有效.大多数选择器(":")都有自动更正,但此代码除外:

override func viewDidLoad() {
    super.viewDidLoad()

    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}

标记错误:

没有使用Objective C选择器'keyboardWillSHow:'声明的方法

此图像显示了所有失败的尝试.

这段代码的新语法是什么？

我正在尝试在注册视图控制器中创建profilePic.profilePic的类型为UIImageView.我希望能够点击它,以便立即在ActionSheet样式中提取照片库.并且还有一个图像框一个按钮来访问相机.这可能吗？

import UIKit

class SignUpViewController: UIViewController, UITextFieldDelegate, UIPickerViewDataSource, UIPickerViewDelegate {

    @IBOutlet weak var profilePic: UIImageView!


    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.

        // PROFILE PICTURE

        let tapGesture = UITapGestureRecognizer(target: self, action: "imageTapped:")

        profilePic.addGestureRecognizer(tapGesture)
        profilePic.userInteractionEnabled = true

    }


    func imageTapped(gesture:UIGestureRecognizer) {
        if let profile1Pic = gesture.view as? UIImageView {
            print("Image Tapped")
        }
    }