我完成了在我的应用上设置Firebase的步骤,并且测试得很好。但是当我创建一个自定义swift类来创建管理数据库的函数时,它会崩溃并说“未能获得默认的firdatabase实例。必须在使用firdatabase之前调用firapp.configure()”。我在AppDelegate中调用了configure(),但它似乎没有传递给我的自定义类。下面是我得到的错误,我的AppDelegate部分,我称之为FirebaseApp.configure(),以及自定义类。提前谢谢。
DatabaseTestApp [7814:336288] ***由于未捕获的异常'FIRAppNotConfigured'而终止应用程序,原因:'无法获取默认的FIRDatabase实例。在使用FIRDatabase之前必须调用FIRApp.configure()。'
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final CheckBox checkBox1 = (CheckBox) findViewById(R.id.checkbox1);
final CheckBox checkBox2 = (CheckBox) findViewById(R.id.checkbox2);
final CheckBox checkBox3 = (CheckBox) findViewById(R.id.checkbox3);
final TextView textView = (TextView) findViewById(R.id.text);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int count = 0;
if (checkBox1.isChecked()) {
++count;
}
if (checkBox2.isChecked()) {
++count;
}
if (checkBox3.isChecked()) {
++count;
}
textView.setText("How many checked? " + count);
}
});
}
}
我的自定义类:
import UIKit
import Firebase
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
FirebaseApp.configure()
return true
}
}
答案 0 :(得分:1)
假设您正在创建某种名为FirebaseManager的类,请执行以下操作:
class FirebaseManager {
public static let instance = FirebaseManager()
private init(){
FirebaseApp.configure()
}
}