我一直在signupviewcontroller中獲取alertview

我現在正在開發一個iOS應用程序，我是初學者，我遵循了一個樹屋課程，並且實際上只用更多的輸入域來做同樣的事情。我試圖從我的signupviewcontroller註冊，但我一直得到alertview，我不明白這是怎麼可能的，而我已經指定 - 就像在課程中 - 只是顯示alertview時，其中一個輸入字段的長度即使在填寫每個輸入字段時，我都會收到此錯誤，誰能幫我解決這個問題？我一直在signupviewcontroller中獲取alertview

這裏是signup.m：

// 
// SignUpViewControllerLeverancier.m 
// SIKA 
// 
// Created by BLANCO on 25-04-14. 
// Copyright (c) 2014 Sinan Karakurt. All rights reserved. 
// 

#import "SignUpViewControllerLeverancier.h" 
#import <Parse/Parse.h> 

@interface SignUpViewControllerLeverancier() 

@end 

@implementation SignUpViewControllerLeverancier 


- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 
} 



- (IBAction)signupLeverancier:(id)sender { 

    NSString *naamLeverancier = self.naamLeverancierField.text ; 

    NSString *telefoonLeverancier = [self.telefoonLeverancierField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 

    NSString *bedrijfsnaamLeverancier = self.bedrijfsnaamLeverancierField.text; 

    NSString *adresLeverancier = self.adresLeverancierField.text; 

    NSString *postcodeLeverancier = self.postcodeLeverancierField.text; 

    NSString *stadLeverancier = self.stadLeverancierField.text; 

    NSString *emailLeverancier = [self.emailLeverancierField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 

    NSString *wachtwoordLeverancier = [self.wachtwoordLeverancierField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 

    if ([naamLeverancier length] == 0 || 
     [telefoonLeverancier length] == 0 || 
     [bedrijfsnaamLeverancier length] == 0 || 
     [adresLeverancier length] == 0 || 
     [postcodeLeverancier length] == 0 || 
     [stadLeverancier length] == 0 || 
     [emailLeverancier length] == 0 || 
     [wachtwoordLeverancier length] == 0) 
    { 

     UIAlertView *alertView = [[ UIAlertView alloc] initWithTitle:@"Leeg veld" message:@"Vul de lege velden in" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil]; 

     [alertView show]; 
      } 

else { 
PFUser *newUserLeverancier = [PFUser user]; 
newUserLeverancier[@"naamLeverancier"] = naamLeverancier; 
     newUserLeverancier[@"telefoonLeverancier"]= telefoonLeverancier; 
     newUserLeverancier.username = bedrijfsnaamLeverancier; 
     newUserLeverancier[@"adresLeverancier"] = adresLeverancier; 
     newUserLeverancier[@"postcodeLeverancier"] = postcodeLeverancier; 
     newUserLeverancier[@"stadLeverancier"] = stadLeverancier; 
     newUserLeverancier.email = emailLeverancier; 
     newUserLeverancier.password = wachtwoordLeverancier; 

     [newUserLeverancier signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { 
      if (error) { 
       UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry!" message:[error.userInfo objectForKey:@"error"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
       [alertView show]; 
      } 
      else { 
       [self.navigationController popToRootViewControllerAnimated:YES]; 
      } 
     }]; 
} 
} 
@end

來源

2014-04-25 user3394645

呃，很明顯你的一個字符串是空的？在方法中添加一個斷點並查看哪一個斷點。 –

告訴我們您已採取哪些措施來確定警報顯示的原因。到目前爲止你做了什麼？ – Gruntcakes

不，即使填充字段，它也會給我這個警報視圖。我甚至嘗試過一場。 – user3394645

也許你沒有連上你的文本字段IBOutlets？嘗試記錄self.naamLeverancierField以查看它返回的內容。如果那個返回正確的對象，請嘗試記錄其他對象。忘記連接插座通常是從視圖中獲取零對象的原因。

來源

2014-04-25 15:56:18 rdelmar

我一直在signupviewcontroller中獲取alertview

回答

相關問題