变更记录

序号	录入时间	录入人	备注
1	2015-03-02	Alfred Jiang	-
2	2015-12-18	Alfred Jiang	-

方案名称

数据存储 - 序列化对象

关键字

数据存储 \ 序列化对象 \ NSKeyedArchiver \ NSJSONSeriali \ 文件存储

需求场景

需要文件存储对象数据时
部分序列化对象需求

参考链接

GitHub - NSSerialisationTests

详细内容

通过NSKeyedArchiver和NSJSONSeriali的对比测试说明序列化对象的一些基本操作和用途

Model.h ```objective-c // // Model.h // Serialisation Test // // Created by Johnnie Walker on 09/05/2013. // Copyright (c) 2013 Random Sequence. All rights reserved. //

import

@interface Model : NSObject @property (nonatomic) NSRect rect; @property (nonatomic) NSPoint point; @property (nonatomic, copy) NSString *UUID;

(id)model;
(NSDictionary *)dict;
(id)modelWithDictionary:(NSDictionary *)dictionary;

@end

2. Model.m
```objective-c
//
//  Model.m
//  Serialisation Test
//
//  Created by Johnnie Walker on 09/05/2013.
//  Copyright (c) 2013 Random Sequence. All rights reserved.
//

#import "Model.h"

NSString * const UUIDKey = @"UUID";
NSString * const PointKey = @"point";
NSString * const RectKey = @"rect";

@implementation Model

+ (id)model {
    Model *model = [Model new];
    model.UUID = [[NSUUID UUID] UUIDString];
    model.point = NSMakePoint(arc4random(), arc4random());
    model.rect = NSMakeRect(model.point.x, model.point.y, arc4random(), arc4random());
    return model;
}

- (void)encodeWithCoder:(NSCoder *)aCoder {
    if ([aCoder allowsKeyedCoding]) {
        [aCoder encodeObject:self.UUID forKey:UUIDKey];
        [aCoder encodePoint:self.point forKey:PointKey];
        [aCoder encodeRect:self.rect forKey:RectKey];
    } else {
        [aCoder encodeObject:self.UUID];
        [aCoder encodePoint:self.point];
        [aCoder encodeRect:self.rect];
    }
}

- (id)initWithCoder:(NSCoder *)decoder {
    self = [super init];
    if (self) {
        if ([decoder allowsKeyedCoding]) {
            self.UUID = [decoder decodeObjectForKey:UUIDKey];
            self.point = [decoder decodePointForKey:PointKey];
            self.rect = [decoder decodeRectForKey:RectKey];
        } else {
            self.UUID = [decoder decodeObject];
            self.point = [decoder decodePoint];
            self.rect = [decoder decodeRect];
        }
    }
    return self;
}

- (NSDictionary *)dict {
    return @{
             UUIDKey: self.UUID,
             PointKey: NSStringFromPoint(self.point),
             RectKey: NSStringFromRect(self.rect)
             };
}

+ (id)modelWithDictionary:(NSDictionary *)dictionary {
    Model *model = [Model new];
    model.UUID = [dictionary objectForKey:UUIDKey];
    model.point = NSPointFromString([dictionary objectForKey:PointKey]);
    model.rect = NSRectFromString([dictionary objectForKey:RectKey]);
    return model;
}

@end

Serialisation_TestTests.m ```objective-c // // Serialisation_TestTests.m // Serialisation TestTests // // Created by Johnnie Walker on 09/05/2013. // Copyright (c) 2013 Random Sequence. All rights reserved. //

import "Serialisation_TestTests.h"

import "Model.h"

define ITERATIONS 100000

@interface Serialisation_TestTests () @property (nonatomic, strong) NSArray *models; @end

@implementation Serialisation_TestTests

(void)setUp { NSMutableArray *models = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (NSInteger i=0; i<ITERATIONS; i++) {
```
  [models addObject:[Model model]];
```
} self.models = models; }
(void)tearDown { self.models = nil; }
(void)testNSCoding { NSDate startDate = [NSDate date]; NSMutableArray array = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (Model *model in self.models) {
```
  [array addObject:[NSArchiver archivedDataWithRootObject:model]];
```
} NSMutableArray models1 = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (NSData data in array) {
```
  [models1 addObject:[NSUnarchiver unarchiveObjectWithData:data]];
```
} NSDate *endDate = [NSDate date];

NSLog(@"NSArchiver models: %li duration: %f", (unsigned long)[models1 count], [endDate timeIntervalSinceDate:startDate]); }
(void)testNSKeyedCoding { NSDate startDate = [NSDate date]; NSMutableArray array = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (Model *model in self.models) {
```
  [array addObject:[NSKeyedArchiver archivedDataWithRootObject:model]];
```
} NSMutableArray models1 = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (NSData data in array) {
```
  [models1 addObject:[NSKeyedUnarchiver unarchiveObjectWithData:data]];
```
} NSDate *endDate = [NSDate date];

NSLog(@"NSKeyedArchiver models: %li duration: %f", (unsigned long)[models1 count], [endDate timeIntervalSinceDate:startDate]); }

(void)testPropertyListSerialisation { NSDate startDate = [NSDate date]; NSMutableArray array = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (Model *model in self.models) {

  [array addObject:[NSPropertyListSerialization dataWithPropertyList:[model dict] format:NSPropertyListBinaryFormat_v1_0 options:0 error:nil]];

} NSMutableArray models1 = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (NSData data in array) {

  [models1 addObject:
   [Model modelWithDictionary:
    [NSPropertyListSerialization propertyListWithData:data
                                              options:NSPropertyListImmutable
                                               format:NULL
                                                error:nil]]];

} NSDate *endDate = [NSDate date];

NSLog(@"NSPropertyListSerialization models: %li duration: %f", (unsigned long)[models1 count], [endDate timeIntervalSinceDate:startDate]); }

(void)testJSONSerialisation { NSDate startDate = [NSDate date]; NSMutableArray array = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (Model *model in self.models) {
```
  [array addObject:[NSJSONSerialization dataWithJSONObject:[model dict] options:0 error:nil]];
```
} NSMutableArray models1 = [NSMutableArray arrayWithCapacity:ITERATIONS]; for (NSData data in array) {
```
  [models1 addObject:[Model modelWithDictionary:[NSJSONSerialization JSONObjectWithData:data options:0 error:nil]]];
```
} NSDate *endDate = [NSDate date];

NSLog(@"NSJSONSerialization models: %li duration: %f", (unsigned long)[models1 count], [endDate timeIntervalSinceDate:startDate]); }