使用Firebase验证电子邮件适用于iOS

Question

当提交创建新用户的请求时，如果用户尝试使用无效的电子邮件提交，则应用程序崩溃（I.E.没有@符号）。有没有办法通过Firebase检查电子邮件是否有效，或者我需要验证应用程序端？

我在控制台得到的错误是：

*终止应用程序由于未捕获的异常 'InvalidEmail'，理由是： 'jfkdsla; fjdk是无效的电子邮件地址'

NSString *url = [NSString stringWithFormat:@"https://myapp.firebaseio.com/users/%@", displayName.text]; 
    Firebase *dataRef = [[Firebase alloc] initWithUrl:url]; 
    [dataRef observeEventType:FEventTypeValue withBlock:^(FDataSnapshot *snapshot) { 

     NSLog(@"Ref %@", snapshot.value); 
     snapshotValue = snapshot.value; 
    }]; 

    if (snapshotValue == NULL) { 
     AppDelegate *appDelegate= (AppDelegate *)[[UIApplication sharedApplication] delegate]; 

     [appDelegate.authClient createUserWithEmail:email.text password:password.text andCompletionBlock:^(NSError* error, FAUser*user) { 

      if (error != nil) { 
       // Error 
       NSLog(@"ERROR CODE: %d",error.code); 
       NSLog(@"ERROR: %@",error); 

       if (error.code == -9999) { 

        email.textColor = [UIColor redColor]; 

       } 

      } else { 

       NSLog(@"Created %@",user.userId); 
       Firebase *userRef = [[Firebase alloc] initWithUrl:[NSString stringWithFormat:@"https://myapp.firebaseio.com/users/%@",displayName.text]]; 
       [[userRef childByAppendingPath:@"name"] setValue:fullName.text]; 
       [[userRef childByAppendingPath:@"user_id"] setValue:user.userId]; 

       Firebase *userCredentials = [[Firebase alloc] initWithUrl:[NSString stringWithFormat:@"https://myapp.firebaseio.com/users/%@/credentials",displayName.text]]; 
       [[userCredentials childByAppendingPath:@"email"] setValue:email.text]; 
       [[userCredentials childByAppendingPath:@"password"] setValue:password.text]; 



       AppDelegate *appDelegate= (AppDelegate *)[[UIApplication sharedApplication] delegate]; 

       [appDelegate.authClient loginWithEmail:email.text andPassword:password.text 
            withCompletionBlock:^(NSError* error, FAUser* user) { 

             if (error != nil) { 
              NSLog(@"There was an error logging in to this account: %@",error); 

             } else { 
              NSLog(@"logged in"); 
              [self dismissViewControllerAnimated:NO completion:nil]; 

              [appDelegate.window.rootViewController presentViewController:appDelegate.tabBarController animated:YES completion:nil]; 

             } 
            }];      

      } 

     }]; 

    } 
    else { 

     displayName.textColor = [UIColor redColor]; 

    } 

    } 

Answer 1

由于一个异常被抛出，扔掉的代码“createUserWithEmail”线变成“@try{}/@catch{}”块：

@try { 
    [appDelegate.authClient createUserWithEmail:email.text password:password.text andCompletionBlock:^(NSError* error, FAUser*user) { 
     ... 
     ... 
     // keep that big huge block part intact 
     ... 
     ... 
    } 
} 
@catch (NSException * e) { 
     NSLog(@"Exception: %@", e); 
    } 
}