此代码来自位置
tableView
视图控制器,其中位置是从 Four Square API 序列化的,我抓取数据,将其传递回我创建事件的视图控制器。数据已正确序列化,填充了 tableView
等,所以我现在不会费心发布它,只需使用 segue
方法来传递数据。
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let indexPath = self.tableView.indexPathForSelectedRow
let item = self.responseItems![indexPath!.row]
var eventVC = CreateEventViewController()
if segue.identifier == "pushBackToEventVC" {
if let venue = item["venue"] as? NSDictionary {
let locationString = venue["name"] as! String
let location = venue["location"]
//get lat/long strings
print(location)
eventVC.updateWithLocation(locationString)
eventVC.updateWithGeoPoint(PFGeoPoint(latitude: locationLatitude, longitude: locationLongitude))
}
eventVC = segue.destinationViewController as! CreateEventViewController
//pass location coordinates
}
//the rest of the segue method
}
创建事件视图控制器中的更新方法,当我在这些方法上放置断点时,我可以看到数据已正确传递,并且位置(
PFGeoPoint
)工作正常,但locationString
(字符串)抛出“错误指令错误”,尽管它确实将其正确打印到控制台:
func updateWithLocation(locationString: String) {
print(locationString)
self.locationLabel.text = locationString
}
func updateWithGeoPoint(venueLocation: PFGeoPoint) {
// print(venueLocation)
self.event?.location = venueLocation
self.eventLocation = venueLocation
print(self.eventLocation)
}
有什么想法吗?它基本上可以工作,但不会用字符串更新标签,尽管我可以看到它已正确传递。
尝试使用此代码块,
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "pushBackToEventVC") {
let detailViewController = ((segue.destinationViewController) as! CreateEventViewController)
let indexPath = self.tableView!.indexPathForSelectedRow!
detailViewController.locationString = venue["location"]
}
}