iOS使用UUID+KeyChain实现获取存储手机唯一标示

应用需要同后台同步登陆日志信息，需要手机唯一标示。目前苹果自带的UDID被禁用，只能采用UUID+KeyChain模拟实现唯一标示。支持应用卸载、更新(刷机、系统升级好像有影响)

具体实现方式(部分第三方库可能类同名，使用时请将类名重置，一般不会重名报错)

工具类下载地址：https://download.csdn.net/download/wangxiaoertedaye/11069297(积分貌似不能调，5分太多有谁知道怎么调的留言谢谢)

1.创建实现KeyChain，创建类 实现获取、创建、删除方法

@interface KeyChainStore : NSObject

+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)deleteKeyData:(NSString *)service;

@end


@implementation KeyChainStore

+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
    return [NSMutableDictionary dictionaryWithObjectsAndKeys:
            (id)kSecClassGenericPassword,(id)kSecClass,
            service, (id)kSecAttrService,
            service, (id)kSecAttrAccount,
            (id)kSecAttrAccessibleAfterFirstUnlock,(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((CFDictionaryRef)keychainQuery);
    //Add new object to search dictionary(Attention:the data format)
    [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];
    //Add item to keychain with the search dictionary
    SecItemAdd((CFDictionaryRef)keychainQuery, NULL);
}

+ (id)load:(NSString *)service {
    id ret = nil;
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    //Configure the search setting
    //Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue
    [keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];
    [keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
    CFDataRef keyData = NULL;
    if (SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
        @try {
            ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
        } @catch (NSException *e) {
            NSLog(@"Unarchive of %@ failed: %@", service, e);
        } @finally {
        }
    }
    if (keyData)
        CFRelease(keyData);
    return ret;
}

+ (void)deleteKeyData:(NSString *)service {
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    SecItemDelete((CFDictionaryRef)keychainQuery);
}


@end
           

2.创建工具类、获取唯一标示，如果已经生成存储直接获取，没有则创建存储

@interface UUID : NSObject

+(NSString *)getUUID;

@end



@implementation UUID

+(NSString *)getUUID
{
    //获取项目的bundle ID
    NSString *bundleId = [[NSBundle mainBundle] bundleIdentifier];
    //根据bundle ID拼接一个自定义的key用来作为keychain里面的唯一标示
    //NSString *keyUUid = [NSString stringWithFormat:@"%@.uuid",bundleId];
    //将bundle ID作为唯一key在keychain里面获取保存的uuid
    NSString * strUUID = (NSString *)[KeyChainStore load:bundleId];
    
    //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
        [KeyChainStore save:bundleId data:strUUID];
        
    }
    return strUUID;
}

@end