UDID始終從IOS中的鑰匙串返回零數據？

Question

我在我的鑰匙串保存[[[UIDevice currentDevice] identifierForVendor] UUIDString]這樣的應用程序：

NSString *bundleId = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleIdentifier"]; 

NSString *strApplicationUUID; 



if(![keychainItem objectForKey:(__bridge id)(kSecValueData)]){ 
     NSString *idfa = [[[UIDevice currentDevice] identifierForVendor] UUIDString]; 
      NSLog(@"bundleId %@",idfa); 
     [keychainItem setObject:idfa forKey:(__bridge id)(kSecValueData)]; 
     NSLog(@"saving item %@", [keychainItem objectForKey:(__bridge id)(kSecValueData)]); 
     strApplicationUUID=[keychainItem objectForKey:(__bridge id)(kSecValueData)]; 
    }else{ 
     NSLog(@"saved item is %@", [keychainItem objectForKey:(__bridge id)(kSecValueData)]); 

    strApplicationUUID=[keychainItem objectForKey:(__bridge id)(kSecValueData)]; 
    } 

// NSString *strApplicationUUIDstr = [[NSString alloc] initWithData:[keychainItem objectForKey:(__bridge id)(kSecValueData)] 
               //encoding:NSUTF8StringEncoding]; 

NSLog(@"%@",strApplicationUUIDstr); 
NSLog(@"%@",strApplicationUUID); 

return strApplicationUUID; 

但它給我始終爲零data.its不保存，第一次還，任何人可以幫助我在這？

Answer 1

您的應用程序可能會被拒絕，由於蘋果防止使用UDID： -

也許它可以幫助您：

-(NSString *)getUniqueDeviceIdentifierAsString 
{ 

NSString *appName=[[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString*)kCFBundleNameKey]; 

NSString *strApplicationUUID = [SSKeychain passwordForService:appName account:@"incoding"]; 
if (strApplicationUUID == nil) 
{ 
    strApplicationUUID = [[[UIDevice currentDevice] identifierForVendor] UUIDString]; 
    [SSKeychain setPassword:strApplicationUUID forService:appName account:@"incoding"]; 
} 

return strApplicationUUID; 
}