iOS运用keychain 把identifierForVendor当成唯一标识。替换advertisingIdentifier
iOS运用keychain 结合[[[UIDevice currentDevice] identifierForVendor] UUIDString]
取得设备唯一标识 NSString *identifierStr = [[[UIDevice currentDevice] identifierForVendor] UUIDString]
NSString * const KEY_USERNAME_PASSWORD = @"com.snda.app.usernamepassword";
NSString * const KEY_PASSWORD = @"com.snda.app.password";
NSMutableDictionary *usernamepasswordKVPairs = [NSMutableDictionary dictionary];
[usernamepasswordKVPairs setObject:identifierStr forKey:KEY_PASSWORD]; //存
[ViewController save:KEY_USERNAME_PASSWORD data:usernamepasswordKVPairs]; NSMutableDictionary *readUserPwd = (NSMutableDictionary *)[ViewController load:KEY_USERNAME_PASSWORD];
NSLog(@"%@",readUserPwd); //存
+ (void)save:(NSString *)service data:(id)data {
//Get search dictionary
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
//Delete old item before add new item
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
//Add new object to search dictionary(Attention:the data format)
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
//Add item to keychain with the search dictionary
SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
} + (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(__bridge id)kSecClassGenericPassword,(__bridge id)kSecClass,
service, (__bridge id)kSecAttrService,
service, (__bridge id)kSecAttrAccount,
(__bridge id)kSecAttrAccessibleAfterFirstUnlock,(__bridge id)kSecAttrAccessible,
nil];
} //取
+ (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:(__bridge id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
[keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((__bridge 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)delete:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}
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