if (IOS8) {        UIAlertController *alertController=[UIAlertController alertControllerWithTitle:CustomLocalizedString(@"SetIp", nil) message:@"" preferredStyle:UIAlertControllerStyleAlert];        [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {            NSString *string=[[NSUserDefaults standardUserDefaults]stringForKey:KSETIP];            [textField setText:string.length>0?string:@""];                   }];        UIAlertAction *action=[UIAlertAction actionWithTitle:CustomLocalizedString(@"OK", nil) style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {            str_ip=[alertController.textFields firstObject].text;             NSLog(@"设置的Ip=%@",str_ip);            [[NSUserDefaults standardUserDefaults]setObject:str_ip forKey:KSETIP];            [[NSUserDefaults standardUserDefaults]synchronize];        }];        UIAlertAction *action_cancel=[UIAlertAction actionWithTitle:CustomLocalizedString(@"Cancel", nil) style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {            [self dismissViewControllerAnimated:YES completion:nil];        }];        [alertController addAction:action];        [alertController addAction:action_cancel];        [self presentViewController:alertController animated:YES completion:nil];           }