我试图将图像传递给目标 UIView
的另一个 imageView
,该目标 UIView
连接到源 UIView
超过当前的模态 segue。
我试图通过 segue 传递数据,并通过 Outlet 在源 UIView 中设置图像(即 NSData - 核心数据),但我收到错误 image description 在控制台中 -
"fatal error: unexpectedly found nil while unwrapping an Optional value"
//Code of destination UIView
import UIKit
import CoreData
class ReviewViewController: UIViewController {
@IBOutlet var backgroundImageView:UIImageView!
var subject:Semester!
override func viewDidLoad() {
super.viewDidLoad()
backgroundImageView?.image = UIImage(data: subject.image!)
let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.Dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
backgroundImageView.addSubview(blurEffectView)
// Code of Source UIView
import UIKit
import CoreData
class SubjectDetailViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet var facultyImageView:UIImageView!
var subject:Semester!
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "destinationidentifier"
{
let destinationController = segue.destinationViewController as! ReviewViewController
destinationController.backgroundImageView?.image = self.facultyImageView.image
}
}
您的问题是 backgroundImageView
对象为零,因为 destinationController
当前不在 window
层次结构中。
所以像这样改变你的 prepareForSegue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "destinationidentifier"
{
let destinationController = segue.destinationViewController as! ReviewViewController
destinationController.image = self.facultyImageView.image
}
}
现在在 ReviewViewController
中创建一个图像对象,如下所示,并在 viewDidLoad
var image: UIImage!
override func viewDidLoad() {
super.viewDidLoad()
self.backgroundImageView?.image = self.image
}
希望对你有帮助
关于ios - 无法通过当前模态序列将图像传递给另一个 UIViewController,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37936430/
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