Question

我有物品。一切都是开放的，除了10.开放级别10应该在任何5个完成？这是我的截图http://pixs.ru/showimage/Snimokekra_9304644_10796687.png。

如何使用NSUserDefaults standardUserDefaults保存已完成的级别？我只是初学者，我无法理解一些事情。如果你能帮助我，我将非常感激，我会尽力详细解释。

谢谢

    CCMenu *menuLevel_1 = [CCMenu menuWithItems:menuLevel_1_Item, nil];
    menuLevel_1.position = ccp(size.width/9,size.height/1.4);
    [self addChild:menuLevel_1 z:3];

    CCLabelTTF *label_1 = [CCLabelTTF labelWithString:[NSString stringWithFormat:@"1"] fontName:@"Avenir" fontSize:35];
    label_1.position = ccp(menuLevel_1_Item.contentSize.width/2, menuLevel_1_Item.contentSize.height/2);
    [menuLevel_1_Item addChild:label_1];

   CCMenuItemSprite *menuLevel_2_Item = [CCMenuItemSprite itemFromNormalSprite:[CCSprite spriteWithSpriteFrameName:@"button_level"] selectedSprite:[CCSprite spriteWithSpriteFrameName:@"button_level_clicked"] target:self selector:@selector(Level_2_Scene:)];


    CCMenu *menuLevel_2 = [CCMenu menuWithItems:menuLevel_2_Item, nil];
    menuLevel_2.position = ccp(size.width/4,size.height/1.4);
    [self addChild:menuLevel_2 z:3];

    CCLabelTTF *label_2 = [CCLabelTTF labelWithString:[NSString stringWithFormat:@"2"] fontName:@"Avenir" fontSize:35];
    label_2.position = ccp(menuLevel_2_Item.contentSize.width/2, menuLevel_2_Item.contentSize.height/2);
    [menuLevel_2_Item addChild:label_2];

.........

 CCMenuItemSprite *menuLevel_10_Item = [CCMenuItemSprite itemFromNormalSprite:[CCSprite spriteWithSpriteFrameName:@"button_level_lock"] selectedSprite:[CCSprite spriteWithSpriteFrameName:@"button_level_clicked"] target:self selector:@selector(Level_10_Scene:)];


    CCMenu *menuLevel_10 = [CCMenu menuWithItems:menuLevel_10_Item, nil];
    menuLevel_10.position = ccp(size.width/1.5,size.height/1.8);
    [self addChild:menuLevel_10 z:3];

Answer 1

你不应该使用NSUserDefaults，创建一个自定义的GameState类，如果内容不是太大，使用NSCoding应该做的工作。

这是一个GameState类的例子。

首先，你需要一个Class来处理存储

数据库类标题

 #import <Foundation/Foundation.h>
       id loadData(NSString * filename);
       void saveData(id theData, NSString *filename);

数据库类实施

#import "GCDatabase.h"
        NSString * pathForFile(NSString *filename) {
            // 1
            NSArray *paths =
            NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                NSUserDomainMask,
                                                YES);
// 2
            NSString *documentsDirectory = [paths objectAtIndex:0];
            // 3
            return [documentsDirectory
                stringByAppendingPathComponent:filename];
}
        id loadData(NSString * filename) {
            // 4
            NSString *filePath = pathForFile(filename);
            // 5
            if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
// 6
        NSData *data = [[[NSData alloc]
            initWithContentsOfFile:filePath] autorelease];
// 7
        NSKeyedUnarchiver *unarchiver = [[[NSKeyedUnarchiver alloc]
            initForReadingWithData:data] autorelease];
// 8
        id retval = [unarchiver decodeObjectForKey:@"Data"];
        [unarchiver finishDecoding];
        return retval;
}
return nil; }
void saveData(id theData, NSString *filename) {
    // 9
    NSMutableData *data = [[[NSMutableData alloc] init] autorelease];
    // 10
    NSKeyedArchiver *archiver = [[[NSKeyedArchiver alloc]
        initForWritingWithMutableData:data] autorelease];
    // 11
    [archiver encodeObject:theData forKey:@"Data"];
    [archiver finishEncoding];
    // 12
    [data writeToFile:pathForFile(filename) atomically:YES];

游戏状态标题

    #import <Foundation/Foundation.h>
@interface GameState : NSObject <NSCoding> {
    BOOL completedLevel1;
    BOOL completedLevel2;
    BOOL completedLevel3;
    BOOL completedLevel4;
    BOOL completedLevel5;
    int timesFell;
}
+ (GameState *) sharedInstance;
- (void)save;
@property (assign) BOOL completedLevel1;
@property (assign) BOOL completedLevel2;
@property (assign) BOOL completedLevel3;
@property (assign) BOOL completedLevel4;
@property (assign) BOOL completedLevel5;
@property (assign) int timesFell;
@end

游戏状态实施

    #import "GameState.h"
       #import "GCDatabase.h"
       @implementation GameState
       @synthesize completedLevel1;
       @synthesize completedLevel2;
       @synthesize completedLevel3;
       @synthesize completedLevel4;
       @synthesize completedLevel5;
       @synthesize timesFell;
       static GameState *sharedInstance = nil;
       +(GameState*)sharedInstance {
            @synchronized([GameState class])
            {
                if(!sharedInstance) {
                     sharedInstance = [loadData(@"GameState") retain];
                      if (!sharedInstance) {
                          [[self alloc] init];
                      }
                  }
                return sharedInstance;
}
return nil; }
+(id)alloc {
            @synchronized ([GameState class])
            {
                NSAssert(sharedInstance == nil, @"Attempted to allocate a \
                        second instance of the GameState singleton");
                sharedInstance = [super alloc];
                return sharedInstance;
            }
return nil; }
        - (void)save {
            saveData(self, @"GameState");
        }
        - (void)encodeWithCoder:(NSCoder *)encoder {
            [encoder encodeBool:completedLevel1 forKey:@"CompletedLevel1"];

[encoder encodeBool:completedLevel2 forKey:@"CompletedLevel2"];
    [encoder encodeBool:completedLevel3 forKey:@"CompletedLevel3"];
    [encoder encodeBool:completedLevel4 forKey:@"CompletedLevel4"];
    [encoder encodeBool:completedLevel5 forKey:@"CompletedLevel5"];
    [encoder encodeInt:timesFell forKey:@"TimesFell"];
}
- (id)initWithCoder:(NSCoder *)decoder {
    if ((self = [super init])) {
        completedLevel1 = [decoder
            decodeBoolForKey:@"CompletedLevel1"];
        completedLevel2 = [decoder
            decodeBoolForKey:@"CompletedLevel2"];
        completedLevel3 = [decoder
            decodeBoolForKey:@"CompletedLevel3"];
        completedLevel4 = [decoder
            decodeBoolForKey:@"CompletedLevel4"];
        completedLevel5 = [decoder
            decodeBoolForKey:@"CompletedLevel5"];
        timesFell = [decoder decodeIntForKey:@"TimesFell"];
    }
    return self;
}

如何在cocos2d中使用NSUserDefaults standardUserDefaults？

1 个答案: