Question

我对Objective c很新。在我的应用程序中，我想在.plist文件中保存一个由NSString构成的对象和三个分段控件中的三个NSInteger令牌。它在32位模拟器和设备上工作正常，但是在64位中传递了一个空对象，因为我想是NSCoder。在我的对象类中，我实现了这两个方法：

- (void)encodeWithCoder:(NSCoder *)coder {
    [coder encodeObject: self.cardPath forKey:@"cardPath"];
    [coder encodeInteger: (NSInteger) self.cardSign forKey:@"cardSign"];
    [coder encodeInteger: (NSInteger) self.cardNumber forKey:@"cardNumber"];
    [coder encodeInteger: (NSInteger) self.cardColor forKey:@"cardColor"];
} 

- (id)initWithCoder:(NSCoder *)coder {
    self.cardPath = [coder decodeObjectForKey:@"cardPath"];
    self.cardSign = (NSInteger*) [coder decodeIntegerForKey: @"cardSign"];
    self.cardNumber = (NSInteger*) [coder decodeIntegerForKey:@"cardNumber"];
    self.cardColor = (NSInteger*) [coder decodeIntegerForKey:@"cardColor"];
    return self;
}

我从分段控件中获取值：

cardSelected.cardSign = [NSNumber numberWithInteger:[sender selectedSegmentIndex]];

和

cardSelected.cardNumber = [NSNumber numberWithInt:[sender selectedSegmentIndex]];

和我比较：

cardSelected.cardColor = [NSNumber numberWithInt:[sender selectedSegmentIndex]];
if ([cardSelected.cardColor intValue] ==  0)
{
    [iBack setImage: [UIImage imageNamed: @"5_0.png"]];
    NSLog(@"red");
}

我保存了对象：

'-(IBAction)game:(id)sender
{
      NSMutableArray *cards = [[NSMutableArray alloc] initWithObjects: cardSelected, nil];
      NSData *data = [NSKeyedArchiver archivedDataWithRootObject:cards];
      [[NSUserDefaults standardUserDefaults] setObject:data forKey:@"cards"];
      [data writeToFile:path atomically:YES];}'

我尝试以这种方式在viewDidLoad方法中检索保存的对象

- (void)viewDidLoad

{

[super viewDidLoad];

// testing for 64bit at runtime

if (sizeof(void*) == 4) {
    NSLog(@"You're running in 32 bit");

} else if (sizeof(void*) == 8) {
    NSLog(@"You're running in 64 bit");
}

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
path = [[NSString alloc]initWithString:[paths[0]stringByAppendingPathComponent:@"selectedCard.plist"]];

if([[NSFileManager defaultManager]fileExistsAtPath:path])
{
    segSign.momentary = NO;
    segNumber.momentary = NO;
    segColor.momentary = NO;

    [segSign addTarget:self action:@selector(segmentedSign:) forControlEvents: UIControlEventValueChanged];
    [segNumber addTarget:self action:@selector(segmentedNumber:) forControlEvents: UIControlEventValueChanged];
    [segColor addTarget:self action:@selector(segmentedColor:) forControlEvents: UIControlEventValueChanged];

    NSData *cardsData = [[NSUserDefaults standardUserDefaults] objectForKey:@"cards"];
    NSMutableArray *cards = [NSKeyedUnarchiver unarchiveObjectWithData:cardsData];
    cardSelected = [cards objectAtIndex:0];


    //NSLog(@"%li",cardSelected.cardNumber);

    if ([cardSelected.cardColor intValue] ==  0)
    {
        [iBack setImage: [UIImage imageNamed: @"5_0.png"]];
        NSLog(@"red");
    }

    if ([cardSelected.cardColor intValue] ==  1)
    {
        [iBack setImage: [UIImage imageNamed: @"5_1.png"]];
        NSLog(@"blue");
    }

    [segSign setSelectedSegmentIndex: [cardSelected.cardSign intValue]];
    NSLog(@"check sign...%i", [cardSelected.cardSign intValue]); //always display 1
    NSLog(@"double-check...%@", cardSelected.cardSign); //always display 1
    [segNumber setSelectedSegmentIndex: [cardSelected.cardNumber intValue]];
    [segColor setSelectedSegmentIndex: [cardSelected.cardColor intValue]];

} else
{
    NSLog(@"else");
    Card *i = [[Card alloc]init];
    i.cardSign = 0;
    i.cardNumber = 0;
    i.cardPath = @"0_0.png";
    [iBack setImage: [UIImage imageNamed: @"5_0.png"]];
    cardSelected = i;
}




[iImage setImage: [UIImage imageNamed : cardSelected.cardPath]];



// Do any additional setup after loading the view, typically from a nib.

}

cardSelected是一个带有.h文件的对象卡：

@interface Card : NSObject <NSCoding>
{
NSNumber *cardSign, *cardNumber, *cardColor;
NSString *cardPath;

}

@property (nonatomic) NSNumber *cardSign, *cardNumber, *cardColor;
@property (nonatomic, strong) NSString *cardPath;
@property (nonatomic, strong) NSCoder *coder, *encoder;

@end

并将.m文件实现为

'
   @interface Card : NSObject { NSNumber *cardSign, *cardNumber, *cardColor; NSString *cardPath;

   }

   @property (nonatomic) NSNumber *cardSign, *cardNumber, *cardColor;
   @property (nonatomic, strong) NSString *cardPath;
   @property (nonatomic, strong) NSCoder *coder, *encoder;

   @end

” 使用对象（卡）* cardSelected时，它没有预期的值。我做错了什么？

Answer 1

您使用NSInteger的方式很糟糕。

NSInteger是标量值（取决于平台，它可以是int或long）。

所以当你这样做时

cardSelected.cardSign = (NSInteger*) [sender selectedSegmentIndex];

它错了。

您应该在没有*。

的情况下设置NSInteger ivar

简短回答：在NSInteger之后移除所有星星并且它将起作用。

Answer 2

解决！我试图使用NSCoder存储由三个NSNumber组成的对象'Card'。现在我将三个NSNumber存储在一个NSMutableArray中，我将它写入一个plist文件，没有'Card'类它可以工作，32位和64位。感谢您的帮助，对于虚拟对象，最好简化代码;）

编码NSInteger不适用于64位模拟器 - 目标c

2 个答案: