無法執行segue

Question

嗨會話塊工作正常，但是當我想移動到下一個Viewcontroller我得到thread1：信號SIGABRT ..實際上我試圖從服務器獲取請求並使用回覆來執行以下代碼

- (IBAction)submitb:(id)sender{ 
    if(_otptf.text==self.otpStr && _otptf.text>0){ 
    NSString *post = [NSString stringWithFormat:@"phone=%@",self.stri1]; 
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; 
    //Next up, we read the postData's length, so we can pass it along in the request. 
    NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]]; 
    // Now that we have what we'd like to post, we can create an NSMutableURLRequest, and include our postData 
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setURL:[NSURL URLWithString:@"http://test.kre8tives.com/barebon/customer_checkapi.php"]]; 
    [request setHTTPMethod:@"POST"]; 
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; 
    [request setHTTPBody:postData]; 
    NSLog(@"the data Details is %@", post); 
      // And finally, we can send our request, and read the reply by creating a new NSURLSession: 
    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]]; 
    static NSURLSession* sharedSessionMainQueue = nil; 
    if(!sharedSessionMainQueue){ 
     sharedSessionMainQueue = [NSURLSession sessionWithConfiguration:nil delegate:nil delegateQueue:[NSOperationQueue mainQueue]]; 
    } 

    [[sharedSessionMainQueue dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
     NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; // this is json string 
    // NSError *error; 
     NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error]; // you need to convert to dictionary object 
     NSLog(@"Req cust:%@",requestReply); 
     NSLog(@"requestReply cust: %@", jsonDict); 
     self.tmpv1=[jsonDict valueForKey:@"success"] ; 
     self.strv1=self.tmpv1; 
     NSLog(@"tmp storage inside block:%@",self.tmpv1); 
     if (!error) { 
      if([self.tmpv1 isEqualToString:@"%@"],"0"){ 
          [self performSegueWithIdentifier:@"x2" sender:self]; 
       //[self performSegueWithIdentifier:@"x2" sender:self]; 
       } 
      if([self.tmpv1 isEqualToString:@"%@"],"1"){ 
        [self performSegueWithIdentifier:@"b2" sender:self]; 
       } 
     } 
    }] resume]; 
    // [self navi]; 

} 
else{ 
/* what ever */ 
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Inputs Found or Incorrect Otp!!" 
               message:@"Please check your input!!." 
               delegate:self 
             cancelButtonTitle:@"OK" 
             otherButtonTitles:nil]; 
[alert show]; 
    } 
} 

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(nullable  id)sender{ 
    if ([[segue identifier] isEqualToString:@"x2"]) 
    { 
    ProfileViewController *loadCtr = (ProfileViewController *)segue.destinationViewController; 
    //loadCtr.mobilestrp = self.stri1; 
} 

else if ([[segue identifier] isEqualToString:@"b2"]) 
{ 

} 

} 

這是我的日誌

2017-06-05 12:14:32.884 MenuBar[1496:103465] the data Details is phone=9047038606 
2017-06-05 12:14:33.726 MenuBar[1496:103531] requestReply: { 
    otp = 828712; 
    success = 1; 
} 
2017-06-05 12:14:33.727 MenuBar[1496:103531] tmp storage inside block:828712 
2017-06-05 12:14:33.728 MenuBar[1496:103531] storage:828712 
2017-06-05 12:14:33.729 MenuBar[1496:103531] tmp storage:828712 
2017-06-05 12:14:33.738 MenuBar[1496:103465] 9047038606 
2017-06-05 12:14:45.069 MenuBar[1496:103465] the data Details is phone=9047038606 
2017-06-05 12:14:49.919 MenuBar[1496:103465] Req cust:{"success":0} 
2017-06-05 12:14:52.373 MenuBar[1496:103465] requestReply cust: { 
    success = 0; 
} 
2017-06-05 12:14:52.715 MenuBar[1496:103465] tmp storage inside block:0 
2017-06-05 12:28:08.486 MenuBar[1520:108818] -[WelcomeViewController setCustid:]: unrecognized selector sent to instance 0x7ff98f908790 
2017-06-05 12:28:08.491 MenuBar[1520:108818] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '- [WelcomeViewController setCustid:]: unrecognized selector sent to instance 0x7ff98f908790' 
    *** First throw call stack: 
    (
    0 CoreFoundation      0x000000010ba31b0b __exceptionPreprocess + 171 
    1 libobjc.A.dylib      0x000000010b126141 objc_exception_throw + 48 
    2 CoreFoundation  

在此先感謝您的建議！

Answer 1

您沒有檢查segue標識符 in prepareForSegue方法。

檢查它像這樣：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(nullable id)sender{ 
    if([segue.identifier isEqulaToString: @"x2"]){ 
    //x2 view controller settings 
    } 
    else if([segue.identifier isEqulaToString: @"b2"]){ 
    //b2 view controller settings 
    } 
} 

有了這個，你可以有特定的視圖控制器和它的屬性來設置。

Answer 2

在profileViewController中檢查您的IBActions和變量是否有鏈接到您的文件。那是你的參考插座。

Answer 3

嘗試此

溶液1

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    if ([[segue identifier] isEqualToString:@"ProfileViewController's identifier"]) 
    { 
     ProfileViewController *loadCtr = (ProfileViewController *)segue.destinationViewController; 
      loadCtr.custid =self.tmpv1; 
      loadCtr.mobilestrp = self.stri1; 
    } 

    else if ([[segue identifier] isEqualToString:@"another identifier"]) 
    { 

    } 
} 

溶液2

檢查二者的ViewController的分配賽格瑞標識符和如果兩者相同，則分配不同的標識符。

Answer 4

segue定義了兩個視圖控制器之間的轉換。雖然在你的情況下，賽格呈現WelcomeViewController其中沒有財產custid，所以最好保持使用segue identifier檢查。

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { 

     if ([segue.identifier isEqualToString:@"YOUR_SEGUE_IDENTIFER"]) { 
      //YOUR Code Here 
      ProfileViewController *loadCtr = (ProfileViewController *)segue.destinationViewController; 
      loadCtr.custid =self.tmpv1; 
      loadCtr.mobilestrp = self.stri1; 

     } 
} 

注：確保起點（啓動SEGUE）和終點（要顯示）塞格斯是正確的。而且總是在你的Storyborad上使用segue的唯一標識符。