使用Segues从Parse数组向第二视图控制器快速链接图像

问题描述

这是我的代码，我试图使用"prepareForSegue"函数将图像从tableViewController(firstViewController)发送到我的detailViewController(secondViewController).我已经成功地从解析云中填充了firstViewController，并且已经设法更新了secondViewController标签，但是我无法更新imageView.我已经在下面发布了我的代码

Here is my code, i am trying to use the "prepareForSegue" function to send an image from tableViewController (firstViewController) to my detailedViewController (secondViewController). I have managed to populate my firstViewController from the parse cloud successfully and I have managed to get my secondViewController Labels to update, but i can not get the imageView to update. I have posted my code below

firstViewController

firstViewController

    override func prepareForSegue(segue: UIStoryboardSegue, sender:      AnyObject?) {

    let eventDetailVC: EventDetailsVC = segue.destinationViewController as!  EventDetailsVC
    if let selectedArrayIndex = tableView.indexPathForSelectedRow?.row {

        eventDetailVC.detailNameLabel = postedEvents[selectedArrayIndex]
        eventDetailVC.detailAddressLabel = postedAddress[selectedArrayIndex]
        eventDetailVC.detailCityLabel = postedCity[selectedArrayIndex]
        eventDetailVC.detailStateLabel = postedState[selectedArrayIndex]
        eventDetailVC.detailStartLabel = postedStart[selectedArrayIndex]
        eventDetailVC.detailEndLabel = postedEnd[selectedArrayIndex]
        eventDetailVC.detailPriceLabel = postedPrices[selectedArrayIndex]
        eventDetailVC.detailDescriptionLabel =    postedDescription[selectedArrayIndex]

        // The error is here....i think
        eventDetailVC.detailImageView.image = image

    }
}

secondViewController

secondViewController

   var detailNameLabel = String()
   var detailDescriptionLabel = String()
   var detailPriceLabel = String()
   var detailStartLabel = String()
   var detailEndLabel = String()
   var detailAddressLabel = String()
   var detailCityLabel = String()
   var detailStateLabel = String()
   var detailImageView = UIImage()

   override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    detailName.text = detailNameLabel
    detailDescription.text = detailDescriptionLabel
    detailPrice.text = detailPriceLabel
    detailStart.text = detailStartLabel
    detailEnd.text = detailEndLabel
    detailAddress.text = detailAddressLabel
    detailCity.text = detailCityLabel
    detailState.text = detailStateLabel

    // its this line below....i think
    detailImage.image = detailImageView
    }

请有人帮我解决这个问题，我对这件事有点陌生

Please can someone help me figure this out, Im kinda new to this whole thing

推荐答案

似乎您应该在secondViewController中定义UIImageView而不是UIImage.您的detailImageView必须是UIImageView类型.编写方式为UIImage.

It looks like you should define a UIImageView instead of a UIImage in secondViewController. Your detailImageView will need to be of type UIImageView. The way you have it written, it is of type UIImage.

在secondViewController中，替换

In secondViewController, replace

var detailImageView = UIImage()

使用

var detailImageView = UIImageView()

然后更改:

// its this line below....i think
detailImage.image = detailImageView

到

// its this line below....i think
detailImage.image = detailImageView.image

要处理从表视图单元格发送到第二个视图控制器的图像，将需要从所选单元格中抓取图像.这在您的prepareForSegue中看起来像这样:

To handle the image sending from the table view cell to the second view controller will require grabbing the image from the selected cell. This would look something like this in your prepareForSegue:

if let myIndexPath = tableView.indexPathForSelectedRow? {
    let cell = self.tableView.cellForRowAtIndexPath(myIndexPath)
    eventDetailVC.detailImageView.image = cell.postedEventImage.image 
}

---

您在secondViewController中的viewDidLoad中的其他分配也有点不寻常.您似乎正在根据命名方式从UILabel分配文本值.如果变量是UILabel，则将其命名为 something Label是合适的.但是，如果类型是基于您的变量分配的字符串，则将其命名为 something Label可能会引起混淆.

---

Your other assignments in viewDidLoad in secondViewController are also a bit unusual. You appear to be assigning the text values from UILabels based on how you are naming them. If a variable is a UILabel than having it named somethingLabel is appropriate. However, if the type is a String, which they are based on your variable assignments, than having it named somethingLabel can be a source of confusion.

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