如何安排哪部分代码首先工作

Question

我试图更新parse.com中的图像存储。我在我的视图上有一个imageview，并且该imageview上有一个默认图像。我可以从图书馆中选择照片，并且可以使用我从图书馆中选择的照片更改我的图像浏览图像。但仍然我的代码保存默认图像来解析，而不是我从库中选择的图像。

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) { 
    self.dismissViewControllerAnimated(true, completion: nil) 
    profileImage.image = image 
} 

var objectIds = [String]() 
@IBAction func changePp(sender: AnyObject) { 
    var image = UIImagePickerController() 
    image.delegate = self 
    image.sourceType = UIImagePickerControllerSourceType.PhotoLibrary 
    image.allowsEditing = false 
    self.presentViewController(image ,animated: true,completion: nil) 

    var queryU = PFQuery(className:"ProfilePhoto") 
    queryU.getObjectInBackgroundWithId(self.objectIds[0]) { 
     (Pp: PFObject?, error: NSError?) -> Void in 
     if error != nil { 
      print(error) 
     } else if let Pp = Pp { 


      let imageData = UIImagePNGRepresentation(self.profileImage.image!) 
      let imageFile = PFFile(name: "pImage.png",data: imageData!) 
      Pp["profilePhoto"] = imageFile 


      Pp.saveInBackground() 
     } 
    } 


    } 

从库中选择照片并设置为我的imageview后，如何提供保存解析过程？

Answer 1

这是因为你正在保存图像解析之前从画廊选择图像。所以请在从图书馆中挑选图像后再做。

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) { 
     self.dismissViewControllerAnimated(true, completion: nil) 
     profileImage.image = image 


    var queryU = PFQuery(className:"ProfilePhoto") 
     queryU.getObjectInBackgroundWithId(self.objectIds[0]) { 
      (Pp: PFObject?, error: NSError?) -> Void in 
      if error != nil { 
       print(error) 
      } else if let Pp = Pp { 


       let imageData = UIImagePNGRepresentation(self.profileImage.image!) 
       let imageFile = PFFile(name: "pImage.png",data: imageData!) 
        wait(w_status: 1000) 
       Pp["profilePhoto"] = imageFile 


       Pp.saveInBackground() 
      } 
     } 
    }