最近在整合一些与服务器交互的东西，准备使用序列化的一些东西
使用NSCoding 来进行NSObject 的序列化实现： 整合了网上搜集的两片文章完成了功能：
http://www.cnblogs.com/likwo/archive/2011/05/26/2058134.html
- ( void )encodeWithCoder:(NSCoder * )coder{ Class clazz = [self class ]; u_int count; objc_property_t * properties = class_copyPropertyList(clazz, & count); NSMutableArray * propertyArray = [NSMutableArray arrayWithCapacity:count]; for ( int i = 0 ; i < count ; i ++ ) { const char * propertyName = property_getName(properties[i]); [propertyArray addObject:[NSString stringWithCString:propertyName encoding:NSUTF8StringEncoding]]; } free(properties); for (NSString * name in propertyArray) { id value = [self valueForKey:name]; [coder encodeObject:value forKey:name]; }} - (id)initWithCoder:(NSCoder * )decoder{ if (self = [super init]) { if (decoder == nil) { return self; } Class clazz = [self class ]; u_int count; objc_property_t * properties = class_copyPropertyList(clazz, & count); NSMutableArray * propertyArray = [NSMutableArray arrayWithCapacity:count]; for ( int i = 0 ; i < count ; i ++ ) { const char * propertyName = property_getName(properties[i]); [propertyArray addObject:[NSString stringWithCString:propertyName encoding:NSUTF8StringEncoding]]; } free(properties); for (NSString * name in propertyArray) { id value = [decoder decodeObjectForKey:name]; [self setValue:value forKey:name]; } } return self;}
http://www.cnblogs.com/Kiros/archive/2012/03/09/2387532.html
先是自定义一个自己的类 需要继承 NSCoding 接口
-------------------------------------//我是分隔线//-----------------------------------------
#import <Foundation/Foundation.h>
@interface FourLines : NSObject <NSCoding,NSCopying> {}
@property (nonatomic,retain) NSString *field1;@property (nonatomic,retain) NSString *field2;@property (nonatomic,retain) NSString *field3;@property (nonatomic,retain) NSString *field4;@end
#import "FourLines.h"
#define kField1Key @"Field1"#define kField2Key @"Field2"#define kField3Key @"Field3"#define kField4Key @"Field4"@implementation FourLines
@synthesize field1;
@synthesize field2;@synthesize field3;@synthesize field4;- (void) encodeWithCoder:(NSCoder *)aCoder{
[aCoder encodeObject:field1 forKey:kField1Key]; [aCoder encodeObject:field2 forKey:kField2Key]; [aCoder encodeObject:field3 forKey:kField3Key]; [aCoder encodeObject:field4 forKey:kField4Key];}- (id)initWithCoder:(NSCoder *)aDecoder{
if (self = [super init]) { field1 = [[aDecoder decodeObjectForKey:kField1Key] retain]; field2 = [[aDecoder decodeObjectForKey:kField2Key] retain]; field3 = [[aDecoder decodeObjectForKey:kField3Key] retain]; field4 = [[aDecoder decodeObjectForKey:kField4Key] retain]; } return self;}- (id)copyWithZone:(NSZone *)zone{
FourLines *copy = [[[self class] allocWithZone:zone] init]; copy.field1 = [[self.field1 copyWithZone:zone] autorelease]; copy.field2 = [[self.field2 copyWithZone:zone] autorelease]; copy.field3 = [[self.field3 copyWithZone:zone] autorelease]; copy.field4 = [[self.field4 copyWithZone:zone] autorelease]; return copy;}- (void)dealloc{
[field1 release]; [field2 release]; [field3 release]; [field4 release]; [super dealloc];}@end
下面是一个controller 来实现如何持久化自定义类
#import <UIKit/UIKit.h>
//#define kFilename @"data.plist"
#define kFilename @"archive"#define kDataKey @"Data" //define kFilename @"dataarchiive.plist" //#define kDataKey @"Data" //#define kFilename @"data.sqlite3"@interface PersistenceViewController : UIViewController {
}
@property (nonatomic,retain) IBOutlet UITextField *field1;@property (nonatomic,retain) IBOutlet UITextField *field2;@property (nonatomic,retain) IBOutlet UITextField *field3;@property (nonatomic,retain) IBOutlet UITextField *field4;- (NSString *)dataFilePath;
- (void)applicationWillResignActive:(NSNotification *)notification;@end
#import "PersistenceViewController.h"
#import "FourLines.h"@implementation PersistenceViewController
@synthesize field1;
@synthesize field2;@synthesize field3;@synthesize field4; - (NSString *)dataFilePath{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSLog(@"Document Path:%@",documentsDirectory); return [documentsDirectory stringByAppendingPathComponent:kFilename];}/*// The designated initializer. Override to perform setup that is required before the view is loaded.- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self;}*//*
// Implement loadView to create a view hierarchy programmatically, without using a nib.- (void)loadView { }*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad { NSString *filePath = [self dataFilePath]; if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) { /* NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath]; field1.text = [array objectAtIndex:0]; field2.text = [array objectAtIndex:1]; field3.text = [array objectAtIndex:2]; field4.text = [array objectAtIndex:3]; [array release]; */ //encoding NSData *data = [[NSMutableData alloc] initWithContentsOfFile:filePath]; NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data]; FourLines *fourLines = [unarchiver decodeObjectForKey:kDataKey]; [unarchiver finishDecoding]; field1.text = fourLines.field1; field2.text = fourLines.field2; field3.text = fourLines.field3; field4.text = fourLines.field4; [unarchiver release]; [data release]; } UIApplication *app = [UIApplication sharedApplication]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillResignActive:) name:UIApplicationWillResignActiveNotification object:app]; [super viewDidLoad];}- (void) applicationWillResignActive:(NSNotification *)notification{
/* NSMutableArray *array = [[NSMutableArray alloc] init]; [array addObject:field1.text]; [array addObject:field2.text]; [array addObject:field3.text]; [array addObject:field4.text]; [array writeToFile:[self dataFilePath] atomically:YES]; */ FourLines *fourLine = [[FourLines alloc] init]; fourLine.field1 = field1.text; fourLine.field2 = field2.text; fourLine.field3 = field3.text; fourLine.field4 = field4.text; NSMutableData *data = [[NSMutableData alloc] init]; NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data]; [archiver encodeObject:fourLine forKey:kDataKey]; [archiver finishEncoding]; [data writeToFile:[self dataFilePath] atomically:YES]; [fourLine release]; [data release]; [archiver release];}// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES;}- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use.}- (void)viewDidUnload {
// Release any retained subviews of the main view. // e.g. self.myOutlet = nil;} - (void)dealloc { [field1 release]; [field2 release]; [field3 release]; [field4 release]; [super dealloc];}@end