iOS Archiving/Unarchiving, 以及文件系统
沙盒的根目录下有这3个可操作的文件夹.
获得Document的path:
方法一: NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *ourDocumentPath = [documentPaths objectAtIndex:0];
方法二:
NSString *sandboxPath = NSHomeDirectory();
NSString *ourDocumentPath = [sandboxPath stringByAppendingPathComponent:@"Documents"];
都会的到这样的结果:
/var/mobile/Applications/9EFD60C1-E627-4CCD-BA62-24ED952A0922/Documents
Archiving(固化)/Unarchiving(解固)
NSString *sandboxPath = NSHomeDirectory();
NSString *archivePath = [sandboxPath stringByAppendingPathComponent:@"Documents/archive.data"];
Person *p = [[Person alloc] init];
Body *b = [[Body alloc] init];
b.hand = @"my hand";
p.body = b;
[NSKeyedArchiver archiveRootObject:p toFile:archivePath];
Person *up = [NSKeyedUnarchiver unarchiveObjectWithFile:archivePath];
NSLog(@"%@", up.body.hand);
下面是需要的连个类: body ,person :
#import <Foundation/Foundation.h>
#import "Body.h"
@interface Person : NSObject <NSCoding>
@property Body *body;
@end
#import "Person.h"
@interface Person ()
{
NSInteger age;
}
@end
@implementation Person
@synthesize body;
- (void) encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:body forKey:@"body"];
[aCoder encodeInteger:age forKey:@"age"];
}
-(id) initWithCoder:(NSCoder *)aDecoder
{
self = [super init];
if (self) {
self.body = [aDecoder decodeObjectForKey:@"body"];
}
return self;
}
@end
#import <Foundation/Foundation.h>
@interface Body : NSObject <NSCoding>
@property NSString *hand;
@end
#import "Body.h"
@implementation Body
@synthesize hand;
-(void) encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:hand forKey:@"hand"];
}
-(id) initWithCoder:(NSCoder *) aDecoder
{
self = [super init];
if (self) {
hand = [aDecoder decodeObjectForKey:@"hand"];
}
return self;
}
@end