嘗試將非屬性列表對象設置為NSUserDefault我以為我知道是什么導致了這個錯誤，但我似乎不知道我做錯了什么。下面是我得到的完整錯誤消息：Attempt to set a non-property-list object (
"<BC_Person: 0x8f3c140>"
) as an NSUserDefaults value for key personDataArray我有一個Person類，我認為該類符合NSCoding協議，在我的Person類中有這兩種方法：- (void)encodeWithCoder:(NSCoder *)coder {
[coder encodeObject:self.personsName forKey:@"BCPersonsName"];
[coder encodeObject:self.personsBills forKey:@"BCPersonsBillsArray"];}- (id)initWithCoder:(NSCoder *)coder {
self = [super init];
if (self) {
self.personsName = [coder decodeObjectForKey:@"BCPersonsName"];
self.personsBills = [coder decodeObjectForKey:@"BCPersonsBillsArray"];
}
return self;}在應用程序的某個時候，NSString在BC_PersonClass設置好了，我有一個DataSave類，我認為該類正在處理BC_PersonClass..下面是我從DataSave班級：- (void)savePersonArrayData:(BC_Person *)personObject{
// NSLog(@"name of the person %@", personObject.personsName);
[mutableDataArray addObject:personObject];
// set the temp array to the mutableData array
tempMuteArray = [NSMutableArray arrayWithArray:mutableDataArray];
// save the person object as nsData
NSData *personEncodedObject = [NSKeyedArchiver archivedDataWithRootObject:personObject];
// first add the person object to the mutable array
[tempMuteArray addObject:personEncodedObject];
// NSLog(@"Objects in the array %lu", (unsigned long)mutableDataArray.count);
// now we set that data array to the mutable array for saving
dataArray = [[NSArray alloc] initWithArray:mutableDataArray];
//dataArray = [NSArray arrayWithArray:mutableDataArray];
// save the object to NS User Defaults
NSUserDefaults *userData = [NSUserDefaults standardUserDefaults];
[userData setObject:dataArray forKey:@"personDataArray"];
[userData synchronize];}我希望這是足夠的代碼給你一個想法，我想做什么。同樣，我知道我的問題在于如何在BC_Person類中編碼我的屬性，我只是不知道自己做錯了什么。謝謝你的幫助！
3 回答
藍山帝景
TA貢獻1843條經驗 獲得超7個贊
NSUserDefaultsNSCodingNSArray, NSDictionary, NSString, NSData, NSNumberNSDateNSUserDefaults.
NSDataNSDataNSUserDefaultsNSArrayNSData
NSDataBC_Person
- (void)savePersonArrayData:(BC_Person *)personObject {
[mutableDataArray addObject:personObject];
NSMutableArray *archiveArray = [NSMutableArray arrayWithCapacity:mutableDataArray.count];
for (BC_Person *personObject in mutableDataArray) {
NSData *personEncodedObject = [NSKeyedArchiver archivedDataWithRootObject:personObject];
[archiveArray addObject:personEncodedObject];
}
NSUserDefaults *userData = [NSUserDefaults standardUserDefaults];
[userData setObject:archiveArray forKey:@"personDataArray"];}
慕少森
TA貢獻2019條經驗 獲得超9個贊
BC_Person is a non-property-list object
編輯NSUserDefaults
//: Playground - noun: a place where people can playimport Foundationclass Person: NSObject, NSCoding {
let surname: String
let firstname: String
required init(firstname:String, surname:String) {
self.firstname = firstname
self.surname = surname
super.init()
}
//MARK: - NSCoding -
required init(coder aDecoder: NSCoder) {
surname = aDecoder.decodeObjectForKey("surname") as! String
firstname = aDecoder.decodeObjectForKey("firstname") as! String
}
func encodeWithCoder(aCoder: NSCoder) {
aCoder.encodeObject(firstname, forKey: "firstname")
aCoder.encodeObject(surname, forKey: "surname")
}}//: ### Now lets define a function to convert our array to NSDatafunc archivePeople(people:[Person]) -> NSData {
let archivedObject = NSKeyedArchiver.archivedDataWithRootObject(people as NSArray)
return archivedObject}//: ### Create some peoplelet people = [Person(firstname: "johnny", surname:"appleseed"),Person(firstname:
"peter", surname: "mill")]//: ### Archive our people to NSDatalet peopleData = archivePeople(people)if let unarchivedPeople =
NSKeyedUnarchiver.unarchiveObjectWithData(peopleData) as? [Person] {
for person in unarchivedPeople {
print("\(person.firstname), you have been unarchived")
}} else {
print("Failed to unarchive people")}//: ### Lets try use NSUserDefaultslet UserDefaultsPeopleKey =
"peoplekey"func savePeople(people:[Person]) {
let archivedObject = archivePeople(people)
let defaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(archivedObject, forKey: UserDefaultsPeopleKey)
defaults.synchronize()}func retrievePeople() -> [Person]? {
if let unarchivedObject = NSUserDefaults.standardUserDefaults().objectForKey(UserDefaultsPeopleKey) as? NSData {
return NSKeyedUnarchiver.unarchiveObjectWithData(unarchivedObject) as? [Person]
}
return nil}if let retrievedPeople = retrievePeople() {
for person in retrievedPeople {
print("\(person.firstname), you have been unarchived")
}} else {
print("Writing to UserDefaults is still broken in playgrounds")}
慕沐林林
TA貢獻2016條經驗 獲得超9個贊
NSUserDefaults *currentDefaults = [NSUserDefaults standardUserDefaults];NSData *data = [NSKeyedArchiver archivedDataWithRootObject:yourObject]; [currentDefaults setObject:data forKey:@"yourKeyName"];
NSData *data = [currentDefaults objectForKey:@"yourKeyName"];yourObjectType * token = [NSKeyedUnarchiver unarchiveObjectWithData:data];
[currentDefaults removeObjectForKey:@"yourKeyName"];
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