iCloud keyValue使我的游戏崩溃
问题描述:
尝试使用keyValue对从iCloud检索int。有人可以向我解释为什么这是崩溃的错误:iCloud keyValue使我的游戏崩溃
'[<NSUbiquitousKeyValueStore 0x170287e40> valueForUndefinedKey:]: this class is not key value coding-compliant for the key current.'
它在我以前的项目中工作得很好。
var iCloudKeyStore: NSUbiquitousKeyValueStore = NSUbiquitousKeyValueStore()
func loadSavedData() {
if let cloudCurrent = iCloudKeyStore.value(forKey: "current") as! Int? { /* <-------- Crashes on this line */
print("Current Level Found From iCloud: \(cloudCurrent)")
currentLevel = cloudCurrent
}else{
print("No Current Level Found")
}
if let cloudAchieved = iCloudKeyStore.value(forKey: "achieved") as! Int? {
print("Current Level Found From iCloud: \(cloudAchieved)")
levelAchieved = cloudAchieved
}else{
print("No Achieved Level Found")
}
答
value(forKey :)用于动态访问对象的实例变量。 I. e。键 - 值编码。
该对象上没有名为“current”的实例变量。你想访问商店中存储的值,根据文档应该使用object(forKey :)来完成。