将数据发送到所选的视图控制器

Question

我正在尝试执行一些我知道很简单的事情，但我不确定语法。

首先，我让用户输入 Facebook 登录信息，让他们登录。然后我的代码提取他们的个人资料图片、用户名、电子邮件和 Facebook 按钮，并将其显示在 "LoginiewController" 中。 prof pic 是一个名为 profilePicture 的视图控制器，用户名为 lblUsername，电子邮件为 lblEmail， FB 按钮名为 loginButton。

ALL 我想做的是编写一些代码，将这 4 个值发送到 ProfileViewController，这不是 segue 的下一个视图控制器，以便它显示个人资料图片、用户名、电子邮件和 * 注销 * 按钮。下面是我的 LoginViewController 代码：

*** 仅供参考，代码仅显示了一个 FB 登录按钮、常规登录按钮和一个注册按钮的初始视图，并隐藏了个人资料图片视图、用户名和电子邮件以启动。登录后，我有相同的视图控制器，现在显示个人资料图片、用户名和电子邮件，隐藏*未*单击的登录按钮。

#import "LoginViewController.h"

@interface LoginViewController ()

@end

@implementation LoginViewController


- (void)viewDidLoad {
    [super viewDidLoad];
    NOLogin.layer.cornerRadius = 3;
    [NOLogin.layer setShadowColor:[UIColor blackColor].CGColor];
    [NOLogin.layer setShadowOpacity:0.1];
    [NOLogin.layer setShadowRadius:0.2];
    [NOLogin.layer setShadowOffset:CGSizeMake(0.0, 1.1)];
    [NOLogin.layer setBorderColor:[UIColor blackColor].CGColor];
    [NOLogin.layer setBorderWidth:0.1f];

    self.loginButton.delegate = self;
    [self toggleHiddenState:YES];
    _signUp.hidden = NO;
    NOLogin.hidden = NO;
    self.lblLoginStatus.text = @"";
    self.loginButton.readPermissions = @[@"public_profile", @"email", @"user_friends"];
   // self.

}

-(void)loginViewShowingLoggedInUser:(FBLoginView *)loginView{
    self.lblLoginStatus.text = @"";

    [self toggleHiddenState:NO];
    [self toggleUnhiddenState:YES];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    UITabBarController *tabcontroller = (UITabBarController *)[storyboard instantiateViewControllerWithIdentifier:@"TabController"];
    [self presentModalViewController:tabcontroller animated:YES];



}

-(void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user{
    NSLog(@"%@", user);
    self.profilePicture.profileID = user.objectID;
    self.lblUsername.text = user.name;
    self.lblEmail.text = [user objectForKey:@"email"];
}

-(void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView{
    self.lblLoginStatus.text = @"";
    [self toggleHiddenState:YES];
    _signUp.hidden = NO;
    NOLogin.hidden = NO;

}


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


-(void)toggleHiddenState:(BOOL)shouldHide{
    self.lblUsername.hidden = shouldHide;
    self.lblEmail.hidden = shouldHide;
    self.profilePicture.hidden = shouldHide;
    self.begin.hidden = shouldHide;
    self.loggedinwallpaper.hidden = shouldHide;

}

-(void)toggleUnhiddenState:(BOOL)shouldShow{
    _signUp.hidden = YES;
    NOLogin.hidden = YES;

}

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


- (IBAction)unwindToLogin:(UIStoryboardSegue *)segue {

}




#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
/*- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    [segue destinationTabBabController]
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}


- (IBAction)j:(id)sender {
}*/
- (IBAction)enter:(id)sender forEvent:(UIEvent *)event {
}
@end

Answer 1

在您初始化要展示的 ViewController 之后，您现在可以访问它的属性（您提到的属性并为它们分配您想要的值）。

-(void)loginViewShowingLoggedInUser:(FBLoginView *)loginView{
self.lblLoginStatus.text = @"";

[self toggleHiddenState:NO];
[self toggleUnhiddenState:YES];

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UITabBarController *tabcontroller = (UITabBarController *)[storyboard instantiateViewControllerWithIdentifier:@"TabController"];
//Get the first controller that will be displayed (could be of a different index, depends on how you set it up)
UIViewController *firstController = [[((UITabBarController *)self.window.rootViewController) viewControllers] objectAtIndex:0];//Modify UIViewController to your View controller class name... 
//Now set the properties of that controller to the info you need. I've added one, please continue with the others...
firstController.lblUsername = self.lblUsername;
//Finally, present the tabController.
[self presentModalViewController:tabcontroller animated:YES];
}

将数据发送到所选的视图控制器

Send Data to View Controller of choice

login

objective-c

uiviewcontroller