根据唯一标识来生成账号,对游戏及应用来讲是非常必要的。通常我们会使用UDID(设备唯一标识码)、UUID(通用唯一标识码)、MAC、IDFA(广告标识符)来实现。
但是随着苹果的各项政策,UDID不能用了。iOS7以后,要根据Mac地址绑定账号,不再可行,获得的Mac地址都是02:00:00:00:00:00,IDFA是可以重置的而且多半用于广告。我这里提供一个切实可行的解决方案。
目的:实现iOS设备账号唯一
实现策略:在应用首次启动的时候生成UUID,然后缓存到钥匙串。
步骤:
1、实现WWKeyChianUtils,钥匙串处理工具类。
//
// WWKeyChianUtils.h
// wawaGame
//
// Created by diyal on 16/11/19.
// Copyright (c) 2016年 GRMobile. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface WWKeyChianUtils : NSObject
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service;
+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)delete:(NSString *)service;
@end
#import "WWKeyChianUtils.h"
@implementation WWKeyChianUtils
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service
{
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(__bridge_transfer id)kSecClassGenericPassword,(__bridge_transfer id)kSecClass,
service, (__bridge_transfer id)kSecAttrService,
service, (__bridge_transfer id)kSecAttrAccount,
(__bridge_transfer id)kSecAttrAccessibleAfterFirstUnlock,(__bridge_transfer id)kSecAttrAccessible,
nil];
}
+ (void)save:(NSString *)service data:(id)data
{
//Get search dictionary
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
//Delete old item before add new item
SecItemDelete((__bridge_retained CFDictionaryRef)keychainQuery);
//Add new object to search dictionary(Attention:the data format)
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge_transfer id)kSecValueData];
//Add item to keychain with the search dictionary
SecItemAdd((__bridge_retained CFDictionaryRef)keychainQuery, NULL);
}
+ (id)load:(NSString *)service
{
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
//Configure the search setting
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge_transfer id)kSecReturnData];
[keychainQuery setObject:(__bridge_transfer id)kSecMatchLimitOne forKey:(__bridge_transfer id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((__bridge_retained CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge_transfer NSData *)keyData];
} @catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@", service, e);
} @finally {
}
}
return ret;
}
+ (void)delete:(NSString *)service
{
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge_retained CFDictionaryRef)keychainQuery);
}
@end
2、实现getPhoneUDID,我们自定义为一个UDID,即自定义设备唯一标识。首次调用的时候,会在要钥匙串缓存。
static NSString * const KEY_USER_WAWAIDTENFIY = @"com.mas.wawaGame.wawaidtenfiy";
const char* WWIphoneTool::getPhoneUDID()
{
NSString * strUUID = (NSString *)[WWKeyChianUtils load:KEY_USER_WAWAIDTENFIY];
//首次执行该方法时,uuid为空
if ([strUUID isEqualToString:@""] || !strUUID)
{
//生成一个uuid的方法
CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
strUUID = (NSString *)CFBridgingRelease(CFUUIDCreateString (kCFAllocatorDefault,uuidRef));
//将该uuid保存到keychain
[WWKeyChianUtils save:KEY_USER_WAWAIDTENFIY data:strUUID];
CFRelease(uuidRef);
}
strUUID = [strUUID stringByReplacingOccurrencesOfString:@"-" withString:@""];
return [strUUID UTF8String];
}