将数据传递到本地 html iOS webview

Question

我试图在 Facebook 登录后从我的视图控制器传递到我的标签栏视图控制器，但它给了我这个错误：

'NSInvalidArgumentException'，原因：'Storyboard () 不包含带有标识符的视图控制器 'dashBoardViewController''

这是方法：

- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                            user:(id<FBGraphUser>)user {

    NSString *userName = [user first_name];
    NSString *userId = [user id];


    dashBoardViewController *dashBoardViewController =     [self.storyboard instantiateViewControllerWithIdentifier:@"dashBoardViewController"];
    dashBoardViewController.first_name = userName;
    dashBoardViewController.id = userId;
    [self presentModalViewController:dashBoardViewController animated:YES];
}

编辑

//
//  ViewController.m
//  LoginSampleFB
//
//

#import "ViewController.h"
#import "dashBoardViewController.h"
#import "BFPaperTabBarController.h"
#import <FacebookSDK/FacebookSDK.h>


@interface ViewController ()



@end

@implementation ViewController



- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    self.loginButton.delegate = self;
    self.loginButton.readPermissions = @[@"public_profile", @"email", @"publish_actions",];

}

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





- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                            user:(id<FBGraphUser>)user {

    NSString *userName = [user first_name];
    NSString *userId = [user id];



    dashBoardViewController *dashBoardViewController = [[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"dashBoardViewController"];
    dashBoardViewController.first_name = userName;
    dashBoardViewController.id = userId;
    [self presentModalViewController:dashBoardViewController animated:YES];
}



-(void)loginView:(FBLoginView *)loginView handleError:(NSError *)error{
    NSLog(@"%@", [error localizedDescription]);
}


@end

和

//
//  ViewController.h
//  LoginSampleFB
//
//  Created by Gabriel Theodoropoulos on 12/5/14.
//  Copyright (c) 2014 Appcoda. All rights reserved.
//

#import <UIKit/UIKit.h>
#import <FacebookSDK/FacebookSDK.h>
#import "BFPaperTabBarController.h"

@interface ViewController : UIViewController <FBLoginViewDelegate>

@property (weak, nonatomic) IBOutlet FBLoginView *loginButton;

@property (weak, nonatomic) IBOutlet UIButton *showEvent;

@property (weak, nonatomic) IBOutlet UIButton *goQrcode;

@property (retain, nonatomic) NSString *id;

@property (retain, nonatomic) NSString *first_name;


@end

请上去

Answer 1

你应该看看这个 stackoverflow 主题，它是同一个问题。

UIStoryboard Couldn't find view controller with identifier

继续：

1. 检查并确保在情节提要中设置了控制器类和情节提要 ID。 （请参阅与我的答案相关的主题中的图片）

   自定义类 |类：dashBoardViewController

   身份 |故事板 ID：dashBoardViewController

2. 如果是，但它仍然无法运行，请尝试从 iPhone 模拟器或测试设备中删除您的应用程序，清理您的项目，构建并运行它。

3. 如果错误仍然存​​在： 尝试使用[[UIStoryboard storyboardWithName:@"nameofyourstoryboard" bundle:nil] instantiateViewControllerWithIdentifier:@"dashBoardViewController"] 而不是self.storyboard。 您一定会拥有这样的正确对象。

4. 还是不行？从情节提要中删除您的控制器并尝试重新创建一个新控制器。有时会发生...

Answer 2

登录 Facebook 后，声明一个新控制器 dashBoardViewController 并尝试将其显示为模态控制器。

dashBoardViewController *dashBoardViewController = [[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"dashBoardViewController"];
    dashBoardViewController.first_name = userName;
    dashBoardViewController.id = userId;
    [self presentModalViewController:dashBoardViewController animated:YES];

但这没有任何意义，因为您已经将dashBoardViewController 用作初始控制器。此外，此类dashBoardViewController 是UITabBarController 的子类，因此您可以在附加到标签栏的每个viewcontroller 中访问它。

查看此链接以了解 UITabBarController 的工作原理： https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITabBarController_Class/

查看此链接以了解什么是呈现视图控制器： https://developer.apple.com/library/ios/featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html

要解决您的问题，您必须调用当前的 tabbarcontroller，将其转换为 dashBoardViewController 并设置 facebook 参数。

- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                            user:(id<FBGraphUser>)user {

    NSString *userName = [user first_name];
    NSString *userId = [user id];
    ((dashBoardViewController*)self.tabBarController).first_name = userName;
    ((dashBoardViewController*)self.tabBarController).id = userId;

}

您可以在另一个控制器（如 events）中访问这些变量，例如通过相同的方式：

((dashBoardViewController*)self.tabBarController).first_name
((dashBoardViewController*)self.tabBarController).id

您应该查看一些面向对象的编程课程以了解其工作原理。此外，在编写代码时，请尽量尊重变量的 Camel 大小写和类的 Pascal 大小写等约定。