我正在尝试将数据从一个 View Controller 推送到另一个 View Controller 。我已将一个 viewController 连接到另一个 ViewController 的 navigationController,然后将标识符设置为 “showItemSegue”
。我在这两行中收到错误:
var detailController = segue.destinationViewController as ShowItemViewController
detailController.currentId = nextId!
图片说明:
代码:
override func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
nextId = itemArray?.objectAtIndex(indexPath.row).objectForKey("objectId") as? NSString
self.performSegueWithIdentifier("showItemSegue", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
if (segue.identifier == "showItemSegue") {
var detailController = segue.destinationViewController as ShowItemViewController
detailController.currentId = nextId!
}
}
最佳答案
segue 的目标 View Controller 是 UINavigationController
。您需要询问其顶部 View Controller 才能到达真正的目标 View Controller :
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showItemSegue" {
let navController = segue.destination as! UINavigationController
let detailController = navController.topViewController as! ShowItemViewController
detailController.currentId = nextId!
}
}
关于ios - 通过 navigationController 使用 segue 传递数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53873601/