好吧，我四处打听了一下，我意识到我的问题，但我不知道怎么解决。我已经做了一个自定义类来保存一些数据。我为这个类做对象，我需要它们在会话之间持续。之前我把所有信息都放在NSUserDefaults中，但这行不通。
-[NSUserDefaults setObject:forKey:]: Attempt to insert non-property value '<Player: 0x3b0cc90>' of class 'Player'.
这是我得到的错误消息，当我把我的自定义类，“播放器”，在NSUserDefaults。现在，我已经读到显然NSUserDefaults只存储某些类型的信息。我如何把对象放到NSUSerDefaults中呢?
我读到，应该有一种方法来“编码”我的自定义对象，然后把它放在，但我不知道如何实现它，帮助将感激!谢谢你！
* * * * * * * *进行编辑
好吧，所以我使用下面给出的代码(谢谢!)，但我仍然有一些问题。基本上，代码现在崩溃了，我不确定为什么，因为它没有给出任何错误。也许我错过了一些基本的东西，我只是太累了，但我们会看到的。下面是我的自定义类“Player”的实现:
@interface Player : NSObject {
NSString *name;
NSNumber *life;
//Log of player's life
}
//Getting functions, return the info
- (NSString *)name;
- (int)life;
- (id)init;
//These are the setters
- (void)setName:(NSString *)input; //string
- (void)setLife:(NSNumber *)input; //number
@end
实现文件:
#import "Player.h"
@implementation Player
- (id)init {
if (self = [super init]) {
[self setName:@"Player Name"];
[self setLife:[NSNumber numberWithInt:20]];
[self setPsnCounters:[NSNumber numberWithInt:0]];
}
return self;
}
- (NSString *)name {return name;}
- (int)life {return [life intValue];}
- (void)setName:(NSString *)input {
[input retain];
if (name != nil) {
[name release];
}
name = input;
}
- (void)setLife:(NSNumber *)input {
[input retain];
if (life != nil) {
[life release];
}
life = input;
}
/* This code has been added to support encoding and decoding my objecst */
-(void)encodeWithCoder:(NSCoder *)encoder
{
//Encode the properties of the object
[encoder encodeObject:self.name forKey:@"name"];
[encoder encodeObject:self.life forKey:@"life"];
}
-(id)initWithCoder:(NSCoder *)decoder
{
self = [super init];
if ( self != nil )
{
//decode the properties
self.name = [decoder decodeObjectForKey:@"name"];
self.life = [decoder decodeObjectForKey:@"life"];
}
return self;
}
-(void)dealloc {
[name release];
[life release];
[super dealloc];
}
@end
这就是我的类，很简单，我知道它在创建对象时起作用。下面是AppDelegate文件的相关部分(在这里我调用了加密和解密函数):
@class MainViewController;
@interface MagicApp201AppDelegate : NSObject <UIApplicationDelegate> {
UIWindow *window;
MainViewController *mainViewController;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) MainViewController *mainViewController;
-(void)saveCustomObject:(Player *)obj;
-(Player *)loadCustomObjectWithKey:(NSString*)key;
@end
然后是实现文件的重要部分:
#import "MagicApp201AppDelegate.h"
#import "MainViewController.h"
#import "Player.h"
@implementation MagicApp201AppDelegate
@synthesize window;
@synthesize mainViewController;
- (void)applicationDidFinishLaunching:(UIApplication *)application {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
//First check to see if some things exist
int startup = [prefs integerForKey:@"appHasLaunched"];
if (startup == nil) {
//Make the single player
Player *singlePlayer = [[Player alloc] init];
NSLog([[NSString alloc] initWithFormat:@"%@\n%d\n%d",[singlePlayer name], [singlePlayer life], [singlePlayer psnCounters]]); // test
//Encode the single player so it can be stored in UserDefaults
id test = [MagicApp201AppDelegate new];
[test saveCustomObject:singlePlayer];
[test release];
}
[prefs synchronize];
}
-(void)saveCustomObject:(Player *)object
{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSData *myEncodedObject = [NSKeyedArchiver archivedDataWithRootObject:object];
[prefs setObject:myEncodedObject forKey:@"testing"];
}
-(Player *)loadCustomObjectWithKey:(NSString*)key
{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSData *myEncodedObject = [prefs objectForKey:key ];
Player *obj = (Player *)[NSKeyedUnarchiver unarchiveObjectWithData: myEncodedObject];
return obj;
}
Eeee，抱歉写了这么多代码。只是想帮忙。基本上，应用程序会启动，然后立即崩溃。我已经把范围缩小到应用程序的加密部分，这就是它崩溃的地方，所以我做错了什么，但我不确定是什么。再次感谢您的帮助，谢谢!
(我还没有抽出时间解密，因为我还没有开始加密。)
