替换NSUserDefaults的方案

替换NSUserDefaults的方案

效果

源码

https://github.com/YouXianMing/iOS-Utilities

//

//  BaseValueStorageManager.h

//  ValueStorageManager

//

//  Created by YouXianMing on 16/3/17.

//  Copyright © 2016年 YouXianMing. All rights reserved.

//

#import <Foundation/Foundation.h>

#import "AbsEncryptingMode.h"

@interface BaseValueStorageManager : NSObject

/**

 *  Config the encryptingMode object and properties prefix, you should run this method first.

 *

 *  @param encryptingMode EncryptingMode object.

 *  @param prefix         Prefix string.

 */

+ (void)configEncryptingMode:(AbsEncryptingMode *)encryptingMode prefix:(NSString *)prefix;

/**

 *  Get the shared instance.

 *

 *  @return Shared instance.

 */

+ (instancetype)sharedInstance;

@end

//

//  BaseValueStorageManager.m

//  ValueStorageManager

//

//  Created by YouXianMing on 16/3/17.

//  Copyright © 2016年 YouXianMing. All rights reserved.

//

#import "BaseValueStorageManager.h"

#import "FastCoder.h"

#import <objc/runtime.h>

static NSMutableDictionary  *_dictionary = nil;

@interface BaseValueStorageManager ()

@property (nonatomic, strong) NSArray            *baseValueStorageManagerProperties;

@property (nonatomic, strong) AbsEncryptingMode  *baseValueStorageManagerEncryptingMode;

@property (nonatomic, strong) NSString           *baseValueStorageManagerPrifixName;

@end

@implementation BaseValueStorageManager

+ (void)initialize {

    if (self == [BaseValueStorageManager class]) {

        _dictionary = [NSMutableDictionary dictionary];

    }

}

+ (void)configEncryptingMode:(AbsEncryptingMode *)encryptingMode prefix:(NSString *)prefix {

    BaseValueStorageManager *newObject              = [[[self class] alloc] init];

    newObject.baseValueStorageManagerEncryptingMode = (encryptingMode == nil ? [AbsEncryptingMode new]         : encryptingMode);

    newObject.baseValueStorageManagerPrifixName     = (prefix         == nil ? NSStringFromClass([self class]) : prefix);

    // Get all useful properties.

    NSArray        *allProperties    = [newObject allProperties];

    NSMutableArray *usefulProperties = [NSMutableArray array];

    for (int i = ; i < allProperties.count; i++) {

        NSString *propertyName = allProperties[i];

        if ([propertyName isEqualToString:@"baseValueStorageManagerProperties"] ||

            [propertyName isEqualToString:@"baseValueStorageManagerEncryptingMode"] ||

            [propertyName isEqualToString:@"baseValueStorageManagerPrifixName"]) {

            continue;

        }

        [usefulProperties addObject:propertyName];

    }

    newObject.baseValueStorageManagerProperties = [NSArray arrayWithArray:usefulProperties];

    [_dictionary setObject:newObject forKey:NSStringFromClass([self class])];

    // Set all the properties.

    for (int i = ; i < allProperties.count; i++) {

        NSString *key     = allProperties[i];

        NSString *ketPath = [newObject addPrifixWithString:key prifix:newObject.baseValueStorageManagerPrifixName];

        id object         = [[NSUserDefaults standardUserDefaults] objectForKey:ketPath];

        if (object) {

            object = [FastCoder objectWithData:[newObject.baseValueStorageManagerEncryptingMode decryptData:object]];

            [newObject setValue:object forKey:key];

        }

    }

    // KVO

    for (int i = ; i < newObject.baseValueStorageManagerProperties.count; i++) {

        [newObject addObserver:newObject forKeyPath:newObject.baseValueStorageManagerProperties[i]

                       options:NSKeyValueObservingOptionNew context:nil];

    }

}

- (NSString *)addPrifixWithString:(NSString *)string prifix:(NSString *)prefix {

    return [NSString stringWithFormat:@"_%@_%@", prefix, string];

}

+ (instancetype)sharedInstance {

    return _dictionary[NSStringFromClass([self class])];

}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {

    BaseValueStorageManager *manager    = object;

    NSString                *newKeyPath = [manager addPrifixWithString:keyPath prifix:_baseValueStorageManagerPrifixName];

    id                       newValue   = [_baseValueStorageManagerEncryptingMode encryptData:[FastCoder dataWithRootObject:change[@"new"]]];

    [[NSUserDefaults standardUserDefaults] setObject:newValue forKey:newKeyPath];

}

/**

 *  Get all properties.

 *

 *  @return Properties array.

 */

- (NSArray *)allProperties {

    u_int count;

    objc_property_t *properties      = class_copyPropertyList([self class], &count);

    NSMutableArray  *propertiesArray = [NSMutableArray arrayWithCapacity:count];

    for (int i = ; i<count; i++) {

        const char *propertyName = property_getName(properties[i]);

        [propertiesArray addObject:[NSString stringWithUTF8String: propertyName]];

    }

    free(properties);

    return propertiesArray;

}

- (void)dealloc {

    for (int i = ; i < self.baseValueStorageManagerProperties.count; i++) {

        [self removeObserver:self forKeyPath:self.baseValueStorageManagerProperties[i]];

    }

}

@end

细节