Question

I’m getting a compiler error when i try to build the following code. Its a simple View (UntitledViewController) that has a navbar with a bar button item which calls showPopUp that creates and displays a pop up with my other view (popoverview).

Popoverview has a button which calls hidePopOver which im trying to make close the pop up , but I’m getting this compiler error:

"expected ':' before '.' token"

on this line:

[UntitledViewController.popOver dismissPopoverAnimated:YES];

If i comment out the line of code or put an NSLog it works fine

UntitledViewController

/*--UntitledViewController.h--*/

#import <UIKit/UIKit.h>

@interface UntitledViewController : UIViewController {
    UIPopoverController *popOver;
    IBOutlet UIBarButtonItem *popOverbutton;
}

@property (nonatomic, retain) UIPopoverController *popOver;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *popOverbutton;

-(IBAction)showPopUp;

@end


/*--UntitledViewController.m--*/

#import "UntitledViewController.h"
#import "popoverview.h"

@implementation UntitledViewController
@synthesize popOverbutton, popOver;

-(IBAction)showPopUp {
      popoverview *popView = [[popoverview alloc] initWithNibName:@"popoverview" bundle:nil];
      popOver = [[UIPopoverController alloc] initWithContentViewController:popView];
      [popOver presentPopoverFromBarButtonItem:popOverbutton permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
 }
 ...

popoverview

/*--popoverview.h--*/   

#import <UIKit/UIKit.h>

@interface popoverview : UIViewController {

}
-(IBAction)hidePopOver;
@end


/*--popoverview.m--*/

#import "popoverview.h"
#import "UntitledViewController.h"

@implementation popoverview
-(IBAction)hidePopOver {
    [UntitledViewController.popOver dismissPopoverAnimated:YES]; (ERROR "expected ':' before '.' token")
}

Answer 1

UntitledViewController is a class. You need an instance if you want to access a property.

UntitledViewController * vc = [ UntitledViewController new ];

Then you can access the property on the instance:

vc.popOver

Objective-C does not support class variables, nor class properties.