小编Joh*_*ood的帖子

我在swift 3中使用以下代码来调出日期选择器.

import UIKit


class ViewController: UIViewController, UITextFieldDelegate {
    @IBOutlet var eventStartText: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()

    eventStartText.delegate = self

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

// MARK: TextField Delegate
func datePickerChanged(sender: UIDatePicker) {
    let formatter = DateFormatter()
    //formatter.dateStyle = .full
    formatter.dateStyle = .long
    formatter.timeStyle = .none
    eventStartText.text = formatter.string(from: sender.date)

    print("Try this at home")
}

func textFieldDidBeginEditing(_ textField: UITextField) …

我刚刚在 Xcode 10.1 上将应用程序从swift3转换为swift4.2

我正在修复一些已出现的错误。显然 substring(from:)' 已被弃用。使用字符串切片下标和“部分范围来自”运算符

t_prefix_phone = contact_phone.substring(to:contact_phone.index(contact_phone.startIndex, offsetBy: 3))

t_phone = contact_phone.substring(from:contact_phone.index(contact_phone.endIndex, offsetBy: -7))

您能否帮我将上面的代码翻译为 4.2，使结果仍然是字符串。

谢谢

请帮我登录Facebook

我从放入豆荚开始

pod 'FacebookCore'
pod 'FacebookLogin'
pod 'FacebookShare'
and then run pod install

之后，我已经将其导入到我的viewController中

import UIKit
import FacebookCore
import FacebookLogin

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    let loginButton = LoginButton(readPermissions: [ .publicProfile ])
    loginButton.center = view.center
    view.addSubview(loginButton)
}

    override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
    }


}

我用Facebook数据更新了info.plist

用户授权应用后，如何获取用户基本资料？AppDelegate文件中包含什么？

谢谢

我有 2UIViewController秒。一个UIViewController有很多按钮的视图，高+2000点。另一个UIViewController有一个UIScrollView.

这是我的代码：

import UIKit

 class ViewController: UIViewController {

@IBOutlet weak var scrollView: UIScrollView!


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.


    scrollView.contentSize = CGSize(width: 375, height: 2884)

    DispatchQueue.main.async {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let thumb_vc = storyboard.instantiateViewController(withIdentifier: "thumb") as! ThumbsViewController
        //self.present(vc, animated: true, completion: nil)

    self.addChildViewController(thumb_vc)
    self.scrollView.addSubview(thumb_vc.view)
   }
 } 

尽管拇指UIViewController加载到UIScrollView，但大小错误且不滚动。

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