带有情节提要的 presentViewController 显示黑色视图 iOS 7.1 xcode 5.1

Posted 2023-02-26

【中文标题】带有情节提要的 presentViewController 显示黑色视图 iOS 7.1 xcode 5.1

【英文标题】：presentViewController with storyboards shows black view iOS 7.1 xcode 5.1

【发布时间】：2014-07-26 06:22:38

【问题描述】：

我确实搜索过，但网上没有找到艾米的答案。 我在故事板主 UITableViewController 中创建了一个名为 A 的简单按钮。 和另一个名为 B 的 ViewController 具有 webView 和关闭按钮。 没有以任何形式连接到主 UITableViewController A 现在我喜欢打开 B viewController form A 然后用它自己的关闭按钮关闭 B ViewController。 但是我尝试过的 B 视图控制器是黑色和空白的。

ViewController B（弹出视图）

#import "TAFBLoginDialogViewController.h"

@interface TAFBLoginDialogViewController ()

@end

@implementation TAFBLoginDialogViewController

-(id)initWithAppId:(NSString *)apiKey
  requestPremision:(NSString *)requestPremision
          delegate:(id<TAFBLoginDialogViewdelegate>)delegate
          storyBoardName:(NSString*) storyBoardName

    //self = [super initWithNibName:@"FBLoginDialog" bundle:nil];
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyBoardName bundle:nil];

    UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"FBLoginDialog"];
    if (self) 
        // Custom initialization
        self.apiKey = apiKey;
        self.requestPremision = requestPremision;
        self.delegate = delegate;
    
    return self;




- (IBAction)closeTap:(id)sender

    [self.delegate closeTaped];



-(void)login



-(void)logout




-(void)checkForAccessToken:(NSString*)urlString



-(void)checkLoginRequired:(NSString*)urlString

    [self.delegate displayRequired];


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) 
        // Custom initialization
    
    return self;


- (void)viewDidLoad

    [super viewDidLoad];
    // Do any additional setup after loading the view.


- (void)didReceiveMemoryWarning

    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.

UITableViewController A（我尝试从中打开 B 的主视图控制器）

#import "TAFMETableViewController.h"


@interface TAFMETableViewController ()


@end

@implementation TAFMETableViewController

- (id)initWithStyle:(UITableViewStyle)style

    self = [super initWithStyle:style];
    if (self) 
        // Custom initialization
    
    return self;

-(void) awakeFromNib



    [super awakeFromNib];

- (void)viewDidLoad

    [super viewDidLoad];



- (void)didReceiveMemoryWarning

    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.


#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

#warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 1;


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

#warning Incomplete method implementation.




- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath


    return cell;



- (IBAction)handleOpenFBDialog:(id)sender 
    UIStoryboard * storyboard = self.storyboard;
    NSString * storyboardName = [storyboard valueForKey:@"name"];

    self.appId = @"11111";
    self.permissions =@"public_stream";

    if(_loginDialogView ==nil)
    
        self.LoginDialogViewController = [[TAFBLoginDialogViewController alloc] initWithAppId:_appId
                                                               requestPremision:_permissions
                                                                delegate:self storyBoardName:storyboardName];
        self.loginDialogView = _LoginDialogViewController.view;
    

    [self.LoginDialogViewController checkLoginRequired:@"tst"];

    NSLog(@"Click!");



-(void)accessTokenFound:(NSString*)accessToken

    NSLog(@"accessTokenFound Click!");

-(void)displayRequired

    NSLog(@"displayRequired Click!");
    [self presentViewController:_LoginDialogViewController animated:YES completion:nil];

-(void)closeTaped

    NSLog(@"closeTaped Click!");
    [self dismissViewControllerAnimated:NO completion:nil];



@end

头文件：

@protocol TAFBLoginDialogViewdelegate

-(void)accessTokenFound:(NSString*)accessToken;
-(void)displayRequired;
-(void)closeTaped;

@end


@interface TAFBLoginDialogViewController : UIViewController<UIWebViewDelegate>

    //ivars
//    UIWebView *_webview;
//    NSString* _apiKey;
//    NSString* _requestPremision;
//    id <TAFBLoginDialogViewdelegate> _delegate;


@property (retain) IBOutlet UIWebView *webView;
@property (copy) NSString *apiKey;
@property (copy) NSString *requestPremision;
@property (assign) id<TAFBLoginDialogViewdelegate> delegate;

-(id)initWithAppId:(NSString*)apiKey
          requestPremision:(NSString*)requestPremision
          delegate:(id<TAFBLoginDialogViewdelegate>)delegate
          storyBoardName:(NSString*) storyBoardName;

- (IBAction)closeTap:(id)sender;
-(void)login;
-(void)logout;
-(void)checkForAccessToken:(NSString*)urlString;
-(void)checkLoginRequired:(NSString*)urlString;


@end

我在 TableView A 中有触发按钮：

- (IBAction)handleOpenFBDialog:(id)sender  

然后这个函数初始化 ViewController B 和调用：

[self.LoginDialogViewController checkLoginRequired:@"tst"];

应该显示 ViewController B 但它所做的一切都显示黑屏。

【参考方案1】：

在您的 initWithAppID 方法中，您从情节提要中实例化您的视图控制器，然后不对它做任何事情。然后你有一个 if (self) 初始化块，但你从来没有初始化过 self。

看起来您想要做的是将 self 设置为等于您从情节提要中实例化的视图控制器，然后在其上设置属性。

将其设为类方法可能更有意义，因为您分配了一个视图控制器对象，并且在它的 init 方法中您从情节提要创建了另一个并忽略了您分配的那个。

+(instancetype) TAFBLoginDialogViewControllerWithAppID:(NSString *)apiKey
  requestPremision:(NSString *)requestPremision
          delegate:(id<TAFBLoginDialogViewdelegate>)delegate
          storyBoardName:(NSString*) storyBoardName

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyBoardName bundle:nil];

    TAFBLoginDialogViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"FBLoginDialog"];

    // Custom initialization
    viewController.apiKey = apiKey;
    viewController.requestPremision = requestPremision;
    viewController.delegate = delegate;

    return viewController; 

【讨论】：

感谢您的回答，我收到了这些错误，我想我没有正确设置 apiKey 和所有其他属性：在 'UIViewController *' 类型的对象上找不到属性 'apiKey' 属性 'requestPremision'在“UIViewController *”类型的对象上找不到我更新了问题

抱歉，在我的示例中，我将 viewController 声明为 UIViewController 而不是 TAFBLoginDialogViewController，这就是为什么您会收到属性不存在的错误。我已经更新了示例。