尝试使用keyValue对从iCloud中检索int。有人可以向我解释为什么这会导致错误:
'[<NSUbiquitousKeyValueStore 0x170287e40> valueForUndefinedKey:]: this class is not key value coding-compliant for the key current.'
我以前的项目工作得很好。
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")
}
答案 0 :(得分:1)
value(forKey :)用于动态访问对象的实例变量。 I. e。键 - 值编码。
没有名为&#34; current&#34;的实例变量。在那个对象上。您想要访问存储在商店中的值,根据文档应该使用object(forKey :)来完成。