Keychain UUID 唯一标识

TARGETS-->Capabilities-->KeyChain Sharing 设置为ON  添加KeyChain Groups  一般为Bundle Identifier即可

然后配置entitlements文件  不过一般创建之后都是已经配置好的

entitlements-->Keychain Access Groups-->item0:$(AppIdentifierPrefix)com.szdtoo.situoTest

钥匙串使用 SSKeychain 简单易用

GetUUID:

#define PLService [NSBundle mainBundle].bundleIdentifier

#define PLAccount @"$(AppIdentifierPrefix)bundleIdentifier"//这里根据自己项目配置

+(NSString *)getUUID

{

CFUUIDRef uuid_ref=CFUUIDCreate(nil);

CFStringRef uuid_string_ref=CFUUIDCreateString(nil, uuid_ref);

CFRelease(uuid_ref);

NSString*uuid=[NSString stringWithString:(__bridge NSString * _Nonnull)(uuid_string_ref)];

CFRelease(uuid_string_ref);

NSString*devicenumber = [SSKeychain passwordForService:PLService account:PLAccount];

if(!devicenumber)

{

devicenumber = uuid;

[SSKeychain setPassword:devicenumber forService:PLService account:PLAccount];

}

return devicenumber;

}

$(AppIdentifierPrefix)的获取

- (NSString *)appIdentifierPrefix {

NSDictionary *query = [NSDictionary dictionaryWithObjectsAndKeys:

kSecClassGenericPassword, kSecClass,

@"bundleSeedID", kSecAttrAccount,

@"", kSecAttrService,

(id)kCFBooleanTrue, kSecReturnAttributes,

nil];

CFDictionaryRef result = nil;

OSStatus status = SecItemCopyMatching((CFDictionaryRef)query, (CFTypeRef *)&result);

if (status == errSecItemNotFound)

status = SecItemAdd((CFDictionaryRef)query, (CFTypeRef *)&result);

if (status != errSecSuccess)

return nil;

NSString *accessGroup = [(__bridge NSDictionary *)result objectForKey:kSecAttrAccessGroup];

NSArray *components = [accessGroup componentsSeparatedByString:@"."];

NSString *bundleSeedID = [[components objectEnumerator] nextObject];

CFRelease(result);

return bundleSeedID;

}