ios - 从画廊或相机中挑选完图像后，我该如何进行 segue？

Question

在我从图库中选择图片或从照相手机拍摄照片后，如何对另一个 Controller 进行 segue？

目前我的 postChoices View 有 2 个按钮，可以将用户带到画廊或拍照。如果用户单击按钮，我会在 Storyboard 中进行 segue，它将把它带到下一个 View ，即 postView

但它不起作用，它一直转到相同的 View 。

这是代码

import UIKit

class postChoices: UIViewController, UIImagePickerControllerDelegate {


    @IBAction func gallery(sender: AnyObject) {

        var image = UIImagePickerController()
        //image.delegate = self
        image.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        image.allowsEditing = false

        self.presentViewController(image, animated: true, completion: nil)


    }
    override func viewDidLoad() {
        super.viewDidLoad()
        self.performSegueWithIdentifier("gall", sender: self)

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

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

    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
        println("Image selected")
        self.dismissViewControllerAnimated(true, completion: nil)
            }


}

编辑后的版本，我添加了 Storyboard

Answer 1

很高兴再次见到你。尝试以下操作并检查下面的示例:

1. 将两个 segue 从 ViewController(不是按钮)连接到目标 ViewControllers
2. 将这些segues 指定为Segue 标识符(在我的示例中我选择了firstSegue 和secondSegue)
3. 将每个 Button 中的一个 IBAction 拖到您的 ViewController(firstButtonpressed、secondButtonPressed)
4. 实现适当的prepareForSegue方法

示例

import UIKit

class ViewController: UIViewController {
  override func viewDidLoad() {
    super.viewDidLoad()
  }

  @IBAction func firstButtonPressed(sender: UIButton) {
    performSegueWithIdentifier("firstSegue", sender: self)
  }

  @IBAction func secondButtonPressed(sender: UIButton) {
    performSegueWithIdentifier("secondSegue", sender: self)
  }

  override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    switch segue.identifier!{
    case "firstSegue":  // Do stuff to prepare for first target VC
    case "secondSegue": // Do stuff to prepare for second target VC
    default: println("Segue not defined")
    }
  }
}

如果您再次需要帮助，请回复我们。

将图像传输到 TargetVC

发送VC的代码:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    switch segue.identifier!{
      case "firstSegue":
      let destination = segue.destinationViewController as! TargetVC
      destination.myImage = UIImage()
      case "secondSegue": // Do stuff to prepare for second target VC
      default: println("Segue not defined")
    }
}

接收VC

class TargetVC: UIViewController {
  var myImage : UIImage!
  override func viewDidLoad() {
    super.viewDidLoad()
  }
}