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iOS

Posted by avinashkunaparaju
avinashkunaparaju
Courses Plus Student 7,256 Points

Logging in or Logging out

So, I have this for the answer. Can someone tell me what is wrong -

question - Now switch to LoginViewController.m. Blocks can also be declared and passed around as variables, as we can see in the existing code below. This code declares a block named 'loginHandler'. In the login method (after the block), add a call to the PFUser class method 'logInWithUsernameInBackground:password:block:'. Use "test" as both the username and password parameters. Then pass in 'loginHandler' as the third parameter. You can use block variables in this manner like how you would use any other variable as a parameter.

#import "LoginViewController.h"
#import "UIAlertView.h"
#import <Parse/Parse.h>

@implementation LoginViewController

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (IBAction)login:(id)sender {
    // This is an example of how to declare a block named loginHandler. It starts with a
    // return type, then the name of the block with a special syntax for naming. The next
    // set of parentheses hold the parameters and their types. Then assigning the block 
    // on the right side looks just like how we defined it in the video (carat with the
    // same parameters in parentheses).
    void (^loginHandler)(PFUser *user, NSError *error) = ^(PFUser *user, NSError *error) {
        if (error) {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry!"
                                                                message:@"Error logging in."
                                                               delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [alertView show];
        }
        else {
            [self.navigationController popToRootViewControllerAnimated:YES];
        }
    };

    // Add your code below!
    [PFUser logInWithUsernameInBackground:@"test" password:@"test" block:loginHandler];



@end
cameron swenson
cameron swenson
9,951 Points
cameron swenson
cameron swenson
9,951 Points

The only thing you are missing is your closing bracket "}" at the end of your IBAction "login". Other then that you are good to go.