一、使用XML属性列表归档
此方法适用于NSString、NSDictionary、NSarray、NSDate、NSnumber，其中atomically参数表示先将字典写入临时备份文件，成功之后，把最终数据写入到dic指定的文件中
1 #import <Foundation/Foundation.h> 2 3 int main(int argc, const char * argv[]) 4 { 5 6 @autoreleasepool { 7 //生成字典dic，并将字典dic写到xml文件myFirstDic文件 8 NSDictionary *dic = @{@"wukong": @"so smart", @"ranHanLu": @"so beautiful", @"family": @"best importtant!"}; 9 if ([dic writeToFile: @"myFirstDic" atomically:YES] == NO) { 10 NSLog(@"Write to file failed"); 11 } 12 13 //读取 14 dic = [NSDictionary dictionaryWithContentsOfFile: @"myFirstDic"]; 15 for (NSString *key in dic) { 16 NSLog(@"key is: %@, value is : %@", key, dic[key]); 17 } 18 } 19 return 0; 20 }
二、适用NSKeyedUnarchiver类中得archiveRootObject:方法存储字典
此方法可直接用于将NSString、NSDictionary、NSarray、NSDate、NSnumber归档，要适用于所有对象，需要对重写encodeWithCoder和initWithCoder方法，见三
1 #import <Foundation/Foundation.h> 2 3 int main(int argc, const char * argv[]) 4 { 5 6 @autoreleasepool { 7 //适用NSKeyedUnarchiver类中得archiveRootObject:方法存储字典 8 9 NSDictionary *dic = @{ 10 @"wukong": @"so smart", @"ranHanLu": @"so beautiful", @"archive": @"ending...." 11 }; 12 [NSKeyedArchiver archiveRootObject: dic toFile: @"dic.archive"]; 13 14 //读取 15 NSDictionary *new; 16 new = [NSKeyedUnarchiver unarchiveObjectWithFile: @"dic.archive"]; 17 for (NSString *key in new) { 18 NSLog(@"key is: %@, value is : %@", key, new[key]); 19 } 20 21 } 22 return 0; 23 }
三、适用NSKeyedUnarchiver类中得archiveRootObject:方法，存储任意对象
1.首先需要对自定义对象添加协议方法 1 #import <Foundation/Foundation.h>
1 #import <Foundation/Foundation.h> 2 3 @interface testClass: NSObject 4 5 @property (copy, nonatomic) NSString *name, *address; 6 @end 7 8 @implementation testClass 9 //添加encodeWithCoder和initWithCoder方法 10 -(void) encodeWithCoder: (NSCoder *) encoder 11 { 12 [encoder encodeObject: name forKey: @"testClassName"]; 13 [encoder encodeObject: address forKey: @"testClassAddress"]; 14 } 15 16 -(id) initWithCoder: (NSCoder *) decoder 17 { 18 name = [decoder decodeObjectForKey: @"testClassName"]; 19 address = [decoder decodeObjectForKey: @"testClassAddress"]; 20 21 return self; 22 } 23 @synthesize name, address; 24 25 @end 26 int main(int argc, const char * argv[]) 27 { 28 29 @autoreleasepool { 30 testClass *myTest = [[testClass alloc] init]; 31 32 myTest.name = @"wukong"; 33 myTest.address = @"sichuan"; 34 //归档 35 [NSKeyedArchiver archiveRootObject: myTest toFile: @"myTest.archive"]; 36 //读出 37 myTest = [NSKeyedUnarchiver unarchiveObjectWithFile: @"myTest.archive"]; 38 NSLog(@"Name is : %@, address is : %@", myTest.name, myTest.address); 39 40 } 41 return 0; 42 }
四、使用NSData自定义归档
此示例将会使用到AddressBook, AddressCard, 以及 myTest类。
以下为程序主体：
#import <Foundation/Foundation.h> #import "AddressBook.h" #import "AddressCard.h" @interface testClass: NSObject @property (copy, nonatomic) NSString *name, *address; @end @implementation testClass @synthesize name, address; //添加encodeWithCoder和initWithCoder方法 -(void) encodeWithCoder: (NSCoder *) encoder { [encoder encodeObject: name forKey: @"testClassName"]; [encoder encodeObject: address forKey: @"testClassAddress"]; } -(id) initWithCoder: (NSCoder *) decoder { name = [decoder decodeObjectForKey: @"testClassName"]; address = [decoder decodeObjectForKey: @"testClassAddress"]; return self; } @end int main(int argc, const char * argv[]) { @autoreleasepool { //创建myTest实例 testClass *myTest = [[testClass alloc] init]; //创建myBook实例 AddressBook *mybook = [[AddressBook alloc] init]; //创建myCard实例 AddressCard *card1 = [[AddressCard alloc] init]; //创建NSMutableData实例，用于存放归档数据 NSMutableData *mutableData = [NSMutableData data]; //创建NSData用于读取归档数据 NSData *data = [NSData data]; //创建NSKeyedArchiver实例，并指定归档到mutableData NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData: mutableData]; //创建NSKeyedUnarchiver，用于读取归档数据 NSKeyedUnarchiver *unArchiver; myTest.name = @"wukong"; myTest.address = @"sichuan"; [card1 setFirstName: @"sun" setLastName:@"wukong" setEmail:@"[email protected]" setAddress: @"huaGuoShan" setPhoneNumber: @"9999999"]; [mybook addAddressCard: card1]; //存档对象 [archiver encodeObject: myTest forKey: @"MyTest"]; [archiver encodeObject: mybook forKey: @"MyBook"]; //表明存档结束 [archiver finishEncoding]; //将存档数据写入指定文件 if ([mutableData writeToFile: @"firstDataArchive" atomically:YES] == NO) { NSLog(@"\nArchive Failed"); } //从指定文件读取存档数据 data = [NSData dataWithContentsOfFile: @"firstDataArchive"]; //指定从data区解码 unArchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData: data]; //解码开始 myTest = [unArchiver decodeObjectForKey: @"MyTest"]; mybook = [unArchiver decodeObjectForKey: @"MyBook"]; //显示 [mybook list]; } return 0; }
1.1 AddressCard类（interface）
1 #import <Foundation/Foundation.h> 2 3 @interface AddressCard : NSObject 4 @property (copy, nonatomic) NSString *firstName, *lastName, *email, *address, *phoneNumber; 5 -(void) setName: (NSString *) theName; 6 -(void) setEmail: (NSString *) theEmail; 7 -(void) setFirstName: (NSString *) theFirstName setLastName: (NSString *) theLastName setEmail: (NSString *) theEmail setAddress: (NSString *) theAddress setPhoneNumber: (NSString *) thePhoneNumber; 8 -(NSString *) name; 9 -(NSString *) email; 10 -(void) print; 11 -(BOOL) isEqual: (AddressCard *) theCard; 12 -(NSComparisonResult) compareName: (AddressCard *) theCard; 13 -(NSComparisonResult) check: (AddressCard *) theCard; 14 @end
1.2 AddressCard类 (implementation)
1 #import "AddressCard.h" 2 3 @implementation AddressCard 4 5 @synthesize firstName, lastName, email, phoneNumber, address; 6 7 -(void) setFirstName: (NSString *) theFirstName setLastName: (NSString *)theLastName setEmail: (NSString *) theEmail setAddress: (NSString *) theAddress setPhoneNumber: (NSString *) thePhoneNumber 8 { 9 firstName = theFirstName; 10 lastName = theLastName; 11 email = theEmail; 12 address = theAddress; 13 phoneNumber = thePhoneNumber; 14 } 15 16 17 -(void) print 18 { 19 NSLog(@"\n%@ %@ %@ %@ %@",firstName, lastName, email, address, phoneNumber); 20 } 21 22 -(BOOL) isEqual: (AddressCard *) theCard 23 { 24 if ([firstName isEqualToString: theCard.firstName] && [email isEqualToString: theCard.email] && [lastName isEqualToString: theCard.lastName]) { 25 return YES; 26 }else{ 27 return NO; 28 } 29 } 30 31 -(NSComparisonResult) compareName: (AddressCard *) theCard 32 { 33 //return [name compare: theCard.name]; 34 return [theCard.firstName compare: firstName]; 35 } 36 37 -(NSComparisonResult) check: (AddressCard *) theCard 38 { 39 return [theCard.lastName compare: lastName]; 40 } 41 42 -(void) encodeWithCoder: (NSCoder *) encoder 43 { 44 [encoder encodeObject: firstName forKey: @"addressCardFirstname"]; 45 [encoder encodeObject: lastName forKey: @"addressCardLastname"]; 46 [encoder encodeObject: email forKey: @"addressCardEmail"]; 47 [encoder encodeObject: phoneNumber forKey: @"addressCardPhoneNumber"]; 48 49 } 50 51 -(id) initWithCoder: (NSCoder *) decoder 52 { 53 firstName = [decoder decodeObjectForKey:@"addressCardFirstname"]; 54 lastName = [decoder decodeObjectForKey:@"addressCardLastname"]; 55 email = [decoder decodeObjectForKey:@"addressCardEmail"]; 56 phoneNumber = [decoder decodeObjectForKey:@"addressCardPhoneNumber"]; 57 return self; 58 } 59 @end
2.1 AddressBook类 (interface类)
1 #import <Foundation/Foundation.h> 2 #import "AddressCard.h" 3 @interface AddressBook : NSObject 4 @property (copy, nonatomic) NSString *bookName; 5 @property (nonatomic, strong) NSMutableArray *book; 6 7 -(instancetype) initWithName: (NSString *) name; 8 -(void) addAddressCard: (AddressCard *) theCard; 9 -(int) entries; 10 -(void) list; 11 -(AddressCard *) lookUp: (NSString *) name; 12 -(NSMutableArray *) lookUpAll: (NSString *) name; 13 -(void) removeCard: (AddressCard *) theCard; 14 -(void) sortByName; 15 -(NSArray *) sortBySelector; 16 -(BOOL) removeByLastName: (NSString *) lastName; 17 @end
2.2 AddressBook类 (implementation)
#import "AddressBook.h" @implementation AddressBook @synthesize book, bookName; -(instancetype) initWithName: (NSString *) name { self = [super init]; if (self) { bookName = [NSString stringWithString: name]; book = [NSMutableArray array]; } return self; } -(instancetype) init{ return [self initWithName: @"noName"]; } -(void) addAddressCard: (AddressCard *) theCard { [book addObject: theCard]; } -(int) entries { return (int)[book count]; } -(void) list { for (AddressCard *theCard in book) { [theCard print]; } } -(AddressCard *) lookUp: (NSString *) name { NSUInteger result = [book indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) { if ([[obj firstName] caseInsensitiveCompare: name] || [[obj lastName] caseInsensitiveCompare: name] || [[obj email] caseInsensitiveCompare:name] || [[obj phoneNumber] caseInsensitiveCompare: name]) { *stop = YES; return YES; }else{ return NO; } }]; if (result != NSNotFound) { return book[result]; }else{ return nil; } /*NSUInteger result = [book indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) { if ([[obj name] caseInsensitiveCompare: name] == NSOrderedSame ) { *stop = YES; return YES; }else{ return NO; } }]; if (result != NSNotFound) { return book[result]; }else{ return nil; } */ /* for (AddressCard *theCard in book) { if ([theCard.name caseInsensitiveCompare: name] == NSOrderedSame) { return theCard; } } return Nil; */ } //查看数组中得所有元素，并放到可变数组中返回 -(NSMutableArray *) lookUpAll:(NSString *)name { NSMutableArray *matchs = [NSMutableArray array]; NSIndexSet *all = [book indexesOfObjectsPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) { if ([[obj name] rangeOfString: name].location == NSNotFound) { [matchs addObject: obj]; return YES; }else{ return NO; } }]; if ([matchs count]) { return matchs; }else{ return nil; } /* NSMutableArray *matchs = [NSMutableArray array]; NSIndexSet *all = [book indexesOfObjectsPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) { if ([[obj name] compare: name] == NSOrderedSame) { [matchs addObject: obj]; return YES; }else{ return NO; } }]; if ([matchs count]) { return matchs; }else{ return nil; } */ } -(void) removeCard: (AddressCard *) theCard { [book removeObjectIdenticalTo: theCard]; } -(void) sortByName { // SEL s = @selector(compareName:); // [book sortUsingSelector: s]; [book sortUsingComparator:^(id obj1, id obj2) { return [[obj2 name] compare: [obj1 name]]; }]; } -(NSArray *) sortBySelector { return [book sortedArrayUsingSelector: @selector(check:)]; } -(BOOL) removeByLastName: (NSString *) lastName { NSUInteger result = [book indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) { if ([[obj lastName] caseInsensitiveCompare: lastName] == NSOrderedSame) { [book removeObject: obj]; *stop = YES; return YES; }else{ return NO; } }]; if (result != NSNotFound) { return YES; }else{ return NO; } } -(void) encodeWithCoder: (NSCoder *) encoder { [encoder encodeObject: book forKey: @"AddressBookBook"]; [encoder encodeObject: bookName forKey: @"AddressBookName"]; } -(id) initWithCoder: (NSCoder *) decoder { book = [decoder decodeObjectForKey: @"AddressBookBook"]; bookName = [decoder decodeObjectForKey: @"AddressBookName"]; return self; } @end
转载于:https://www.cnblogs.com/pretty-guy/p/3958366.html