iPhone數(shù)據(jù)存儲之屬性和歸檔Archive是本文要介紹的內(nèi)容，在iPhone中有四種方式可以永久存儲數(shù)據(jù)分別是屬性列表、歸檔、SQLITE3、coredata。

先來解釋一下，前兩者、后二者操作的時(shí)候有些地方是相同的，以屬性列表和歸檔來說都會用writeToFile/URL:path atomically:flag 和initWithContentofFile/URL:path;兩都都不能直接操作基本數(shù)據(jù)類型，不過前者不能操作自定義的類，而后者可以通過實(shí)現(xiàn)NSCoding協(xié)議來達(dá)到目的。另外要說點(diǎn)的就是IPHONE每個(gè)應(yīng)用都會有三個(gè)文件夾分別是documents、tmp、library分別稱為存儲應(yīng)用的數(shù)據(jù)，臨時(shí)數(shù)據(jù)，數(shù)據(jù)庫。我們要保存的數(shù)據(jù)會在documents中。由于時(shí)間關(guān)系抽空再把這個(gè)文字寫完整些。

#import "dataprocessAppDelegate.h"  
@implementation dataprocessAppDelegate  
@synthesize window;  
@synthesize dataArray;  
-(NSString*)pathFileForProcess:(NSString *)pathName{  
NSArray *directory=NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,NSUserDomainMask, YES);  
return [[directory objectAtIndex:0] stringByAppendingPathComponent:pathName];  
}  
z  
-(void)writeDataToFile{  
firstData = [[NSString alloc] initWithString:@"im first!"];  
secondData = [[NSString alloc] initWithString:@"im secondData!"];  
thirdData = [[NSString alloc] initWithString:@"im thirdData!"];  
NSLog(@"write:\n first: %@ \nscond: %@ \nthird: %@", firstData, secondData, thirdData);  
NSMutableArray *tmp = [[NSMutableArray alloc] init];  
[tmp addObject:firstData];  
[tmp addObject:secondData];  
[tmp addObject:thirdData];  
self.dataArray = tmp;  
[tmp release];  
[firstData release];[secondData release];[thirdData release];  
BOOL bWrite = [dataArray writeToFile:[self pathFileForProcess:@"myTest.txt"]atomically:YES];  
}//屬性讀  
-(void)readDataFromFile{  
if([[NSFileManager defaultManager] fileExistsAtPath:[selfpathFileForProcess:@"myTest.txt"]]){  
      NSMutableArray  *tmpRead = [[NSMutableArray alloc] initWithContentsOfFile:[selfpathFileForProcess:@"myTest.txt"]];  
  self.dataArray = tmpRead;  
      [tmpRead release];  
    firstData = [dataArray objectAtIndex:0];  
    secondData = [dataArray objectAtIndex:1];  
    thirdData = [dataArray objectAtIndex:2];  
    NSLog(@"read:\n first: %@ \nscond: %@ \nthird: %@", firstData, secondData, thirdData);  
return;  
}  
NSLog(@"PROCESS FIRLE DOESNT EXITS!");  
}  
#pragma mark -------object-------------  
//歸檔寫  
-(void)processObjectWrite{  
person *pObject= [[person alloc] init];  
pObject.name = [[NSString alloc] initWithString:@"wenQiang"];  
pObject.profession = [[NSString alloc] initWithString:@"project manager"];  
//[pObject setAge:24 andMarry: NO];  
//NSMutableArray *testData = [[NSMutableArray alloc] init];  
NSMutableData *data=[[NSMutableData alloc] init];  
NSKeyedArchiver *archiver=[[NSKeyedArchiver alloc] initForWritingWithMutableData:data];  
[archiver encodeObject:pObject forKey:@"kObject"];  
[archiver finishEncoding];  
Boolean bWrite = [data writeToFile:[self pathFileForProcess:@"object2.txt"]atomically:YES];  
if(bWrite) NSLog(@"ok..."); else NSLog(@"write error!");  
[archiver release];  
//[pObject release];  
}、、歸檔讀  
-(void)processObjectRead{  
NSMutableData *data = [[NSMutableData alloc] initWithContentsOfFile:[selfpathFileForProcess:@"object2.txt"]];  
NSLog(@"data %@..", data);  
NSKeyedUnarchiver *unchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];  
person *tmp = [unchiver decodeObjectForKey:@"kObject"];  
[unchiver finishDecoding];  
NSLog(@"OBJECT: name: %@ profession: %@\nage: %@\n marry:%@", tmp.name, tmp.profession);  
[unchiver release];  
//[tmp release];  
//實(shí)現(xiàn)  
- (void)applicationDidFinishLaunching:(UIApplication *)application {      
 
    // Override point for customization after application launch  
//[self writeDataToFile];  
//[self readDataFromFile];  
[self processObjectWrite];  
[self processObjectRead];  
    [window makeKeyAndVisible];  
}  
- (void)dealloc {  
    [window release];  
[dataArray release];  
    [super dealloc];  
}  
@end  
//以下是自定義的類  
#pragma mark---class person--  
#define       kName              @"keyName"  
#define       kProfession @"keyProfession"  
#define       kAge @"keyAge"  
#define       kMarry @"keyMarry"  
@implementation person  
@synthesize name;  
@synthesize profession;  
#pragma mark----nscoding delegate 2 method--  
- (void)encodeWithCoder:(NSCoder *)aCoder{  
[aCoder encodeObject:name forKey: kName];  
[aCoder encodeObject:profession forKey: kProfession];  
// [aCoder encodeObject:Age forKey: kAge];  
// [aCoder encodeObject:marry forKey:kMarry];  
}  
- (id)initWithCoder:(NSCoder *)aDecoder{  
if(self = [super init]){  
self.name = [aDecoder decodeObjectForKey:kName];  
self.profession = [aDecoder decodeObjectForKey:kProfession];  
//Age = [aDecoder decodeObjectForKey:kAge];  
// marry=[aDecoder decodeObjectForKey:kMarry];  
}  
return self;  
}  
#pragma mark ---------------NSCopying 1 method-------------  
- (id)copyWithZone:(NSZone *)zone{  
person *tmp = [[[self class] allocWithZone:zone] init];  
tmp.name = [self.name copy];  
tmp.profession = [self.profession copy];  
return nil;  
}  
-(void)dealloc{  
[name release];  
[profession release];  
[super dealloc];  
}  
//-(void)setAge:(NSInteger)age andMarry:(Boolean)b{  
// Age = age;  
// marry = b;  
//}  
@end 

小結(jié)：iPhone數(shù)據(jù)存儲之屬性和歸檔Archive的內(nèi)容介紹完了，希望本文對你有所幫助！