@Protocol＆Delegate - 調用委託方法，但值不會傳遞給父窗體

我的應用程序的登陸頁面是一個UITableView，它有菜單選項列表（menu.h，menu.m）。在菜單的ViewDidAppear中，m，應用程序檢查用戶是否登錄，並通過Modal登錄表單（Login.h，Login.m）進行登錄。在模態登錄表單中，單擊登錄時，委託方法得到執行，但值不會被傳遞。將不勝感激，如果我失去了一些東西@Protocol＆Delegate - 調用委託方法，但值不會傳遞給父窗體

一）類LoggedInUserDetails

A1）類LoggedInUserDetails.h

#import <UIKit/UIKit.h> 
@interface LoggedInUserDetails : NSObject 

@property (nonatomic, copy) NSString *isSuccessfullyLoggedIn; 
@property (nonatomic, copy) NSString *login; 

@end

A2）LoggedInUserDetails.m

#import "LoggedInUserDetails.h" 
@implementation LoggedInUserDetails 

@synthesize isSuccessfullyLoggedIn; 
@synthesize login; 

@end

B）Login.h & Login.m

b1）Login.h

#import <UIKit/UIKit.h> 
@class Login; 
@class LoggedInUserDetails; 

@protocol LoginDelegate <NSObject> 
- (void) login:(Login *)controller GetLoggedInUserDetails:(LoggedInUserDetails *)loggedinuserdetails; 
@end 

@interface Login : UIViewController 

@property (nonatomic, weak) id <LoginDelegate> delegate; 

- (IBAction)actnLogin:(id)sender; 
- (IBAction)actnLogout:(id)sender; 

@end

B2）Login.m

#import "Login.h" 
#import "menu.h" 

@interface Login() 

@end 

@implementation Login 
@synthesize delegate; 


- (IBAction)actnLogin:(id)sender { 
    //[self.delegate didReceiveMessage:@"YES"]; 
    LoggedInUserDetails *loggedinuserdetails = [[LoggedInUserDetails alloc] init]; 
    loggedinuserdetails.login = @"MCONNLEY"; 
    loggedinuserdetails.isSuccessfullyLoggedIn = @"YES"; 
    // The line below is getting executed while checking in debug mode but 
    // doesnot go to menu.m with the result the login form is constantly shown 
    [self.delegate login:self GetLoggedInUserDetails:loggedinuserdetails]; 
}

c）中Menu.h & Menu.m

C1）Menu.h

#import <UIKit/UIKit.h> 
#import "Login.h" 
#import "LoggedInUserDetails.h" 

@interface menu : UITableViewController <LoginDelegate> 

@property (strong, nonatomic) NSArray *menuList; 
@property (nonatomic, strong) LoggedInUserDetails *userDetails; 

@end

C2）Menu.m

#import "menu.h" 

@interface menu() 

@end 

@implementation menu 
@synthesize menuList; 
@synthesize userDetails; 

- (void) viewDidAppear:(BOOL)animated { 
    if (![userDetails.isSuccessfullyLoggedIn isEqualToString:@"YES"]) { 
     [self performSegueWithIdentifier:@"LoginSegue" sender:self]; 
    }  

} 

- (void) login:(Login *)controller GetLoggedInUserDetails:(LoggedInUserDetails *)loggedinuserdetails { 
    userDetails = loggedinuserdetails; 
    IstheUserLoggedIn.text = userDetails.isSuccessfullyLoggedIn; 
    [self dismissModalViewControllerAnimated:YES]; 
}

來源

2012-11-18 user1509593

您似乎沒有在任何地方設置委託。我希望在prepareForSegue中看到這一點。 – jrturton

剛剛在menu.m中添加了這個。仍然沒有工作。 - （無效）prepareForSegue：（UIStoryboardSegue *）賽格瑞發件人：（ID）發送方 { \t如果（[segue.identifier isEqualToString：@ 「LoginSegue」]） \t { \t \t登錄*登錄= [[登錄的alloc]在裏面]; \t \t login.delegate = self; \t} } – user1509593

請勿創建新的「登錄」！使用segue.destinationViewController – jrturton

您似乎沒有在任何地方設置委託。我希望在prepareForSegue中看到這一點。

即將出現的視圖控制器將在segue.destinationViewController中可用。你可以在這裏設置自己爲代表。

來源

2012-11-18 20:45:59 jrturton

@Protocol＆Delegate - 調用委託方法，但值不會傳遞給父窗體

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