ios - popViewController 不返回

Question

我正在制作一个应用程序，它从解析中检索图像并将其显示到 Collection View 中。当用户点击图像时，图像会详细显示。我有一个用户可以更改的文本字段。当用户更改某些内容时，他们会点击保存按钮并返回到 Collection View 。返回到 Collection View Controller 的代码不起作用。

  @IBAction func saveButton(sender: AnyObject) {

    // Use the sent country object or create a new country PFObject
    if let saveInBackWithBlock = currentObject as PFObject? {
        updateObject = currentObject! as PFObject
    } else {
        updateObject = PFObject(className:"Tops")
    }

    // Update the object
    if let updateObject = updateObject {

        updateObject["imageText"] = topsLabel.text

        // Create a string of text that is used by search capabilites
        var searchText = (topsLabel.text)
        updateObject["searchText"] = searchText

        // Update the record ACL such that the new record is only visible to the current user
        updateObject.ACL = PFACL(user: PFUser.currentUser()!)

        // Save the data back to the server in a background task
        updateObject.saveInBackgroundWithBlock{
            (success: Bool, error: NSError?) -> Void in
            if (success) {
                // The object has been saved.

            } else {
                // There was a problem, check error.description
            }
        }

        print("saved")

    }
   self.navigationController?.popViewControllerAnimated(true)

        }

不知道为什么不回到之前的view controller，谢谢

Answer 1

您的父 View 是否嵌入到导航 Controller 中？还有 - View 是如何呈现的？

从您刚刚添加的帖子 - 您无法弹出模态 VC - 尝试关闭 View Controller 。