NSKeyedArchiver archivedDataWithRootObject：不會調用encodeWithCoder

Question

我無法獲得archivedDataWithRootObject方法來調用encodeWithCoder，它看起來很簡單，從我的理解，但它不工作。 下面的代碼：

#import <Foundation/Foundation.h> 

@interface Details : NSObject <NSCoding>{ 

NSMutableArray *myArray; 
} 

@property(nonatomic,retain) NSMutableArray *myArray; 

@end 

---

#import "Details.h" 

@implementation Details 
@synthesize myArray; 


-(id)init{ 
[super init]; 
return self; 
} 

-(id)initWithCoder:(NSCoder *)aDecoder{ 

NSLog(@"initWithCoder"); 
if (self = [super init]) 
{ 
    self.myArray = [[aDecoder decodeObjectForKey:@"details"]retain]; 

} 
return self; 
} 

- (NSMutableArray*)getDetails{ 

NSLog(@"getDetials"); 
// NSUserDefaults *currentDefaults = [NSUserDefaults standardUserDefaults]; 
NSData *details = [[NSUserDefaults standardUserDefaults] objectForKey:@"details"]; 
if (details != nil){ 
    NSArray *oldSavedArray = [NSKeyedUnarchiver unarchiveObjectWithData:details]; 
    if (oldSavedArray != nil) 
     self.myArray = [[NSMutableArray alloc] initWithArray:oldSavedArray]; 
    else 
     self.myArray = [[NSMutableArray alloc] initWithCapacity:1]; 
} 
return self.myArray; 
} 

- (void) addDetails:(NSMutableArray *)details{ 

     NSLog(@"add Details"); 

    [self.myArray addObject:details]; 
    [NSKeyedArchiver archivedDataWithRootObject:self.myArray]; 
    } 

- (void) encodeWithCoder:(NSCoder *)coder; 
{ 
    NSLog(@"encodeWithCoder"); 
    [coder encodeObject:self.myArray forKey:@"details"]; 
} 

@end 

的NSLog（@ 「encodeWithCoder」）不運行。 我可能會錯過一些東西，如果有人有任何想法，將不勝感激。

Answer 1

[NSKeyedArchiver archivedDataWithRootObject:self.myArray]; 

你是在告訴NSKeyedArchiver存檔myArray變量，而不是對象，你剛剛實施<NSCoding>用！

此外，該方法返回NSData *然後，如果需要，您必須單獨寫入磁盤。

試試這個：

NSData * archivedData = [NSKeyedArchiver archivedDataWithRootObject:self];