Question

我已经重新设置了密码，但仍需要更多密码。我的意思是，如果用户向文本字段添加电子邮件并按下发送按钮，则如果它等于Parse上的用户名，则会返回警报。如果没有，请显示警报。有任何想法吗？谢谢

ForgottenViewController.h

-(IBAction)logoutPressed:(id)sender;

@property(nonatomic, strong) IBOutlet UITextField *maill;
@property (nonatomic, strong) IBOutlet UIActivityIndicatorView *activityLog;

@end

ForgottenViewController.m

#import "ForgottenViewController.h"
#import "SignUpViewController.h"

@interface ForgottenViewController ()
@end

@implementation ForgottenViewController
@synthesize maill;



- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [self.view endEditing:YES];
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];


}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}




 -(IBAction)logoutPressed:(id)sender {
     PFQuery *query=[PFUser query];
     [query whereKey:@"username" equalTo:maill];
     [query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
         if (object) {
             NSString *myString = maill.text;
             [PFUser requestPasswordResetForEmailInBackground:myString];
             UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Great" message:@"Now check your email. You will be able to change your password right now." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
             [alert show];
             [_activityLog stopAnimating];
         }else{
             UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Sorry, but the email is not registred." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
             [alert show];
             [_activityLog stopAnimating];
         }
     }];}







@end

Answer 1

对于Android用户：如果有人遇到同样的问题

ParseQuery<ParseUser> query = ParseUser.getQuery();     
        query.whereEqualTo("email", "demo11@gmail.com");

        query.countInBackground(new CountCallback(){

            @Override
            public void done(int count, ParseException e) {
                // TODO Auto-generated method stub
                if (e == null) {
                    if(count==0){
                  //Username doesnt exit
                    }                           
                }               
            }

        });

Answer 2

问题很可能是whereKey搜索区分大小写。确保您完全按照存储方式输入电子邮件。 Parse建议您在这种情况下使用规范字段，在这种情况下，您将电子邮件全部小写，并将单独的电子邮件存储给用户。

我应该第一次看到这个。变量mail是UITextField而不是NSString。尝试将mail.text而非mail传递给查询。

解析检查用户是否已存在

2 个答案: