iPhone: Error when using the FPPopover class when using it with a UIBarButtonItem

Question

I am using the FPPopover class which creates popups for iPhones. I followed the exact steps that are in the readme file but instead of using a UIbutton from a xib file, I am

Answer 1

I was getting the same error. Solution is to create a UIButton Programatically (at the same place of UIBar button item - set the appropriate coordinates) and then present popover from UIButton. Then hide the UIButton.

This code worked for me:

-(void)testMethod {

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

// set action as NULL if you dont need any method/functionality to call

[button addTarget:self action:@selector(aMethod)
 forControlEvents:UIControlEventTouchDown];


[button setTitle:@"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(130, -40, 160.0, 40.0);
[self.view addSubview:button];

AlertsViewController *controller = [[AlertsViewController alloc] init]; 

//our popover
FPPopoverController *popover = [[FPPopoverController alloc] initWithViewController:controller]; 

//the popover will be presented from the Button view 
[popover presentPopoverFromView:button]; 

//hide the button
button.hidden = YES;

}

-(void)aMethod {
// Write any functionality if you need
}

Hope this helps. Let me know if you get any issue.

Answer 2

the presentPopoverFromView is only accepting a UIView subclass. UIBarButtonItem is not a subclass of UIView, so you need to find the view related to that button item. This is the solution I'm using with FPPopoverController

    UIBarButtonItem *buttonItem = sender;
    UIView* btnView = [buttonItem valueForKey:@"view"];
    //On these cases is better to specify the arrow direction
    [popover setArrowDirection:FPPopoverArrowDirectionUp];
    [popover presentPopoverFromView:btnView];

This should work! Let me know!

Answer 3

Mostly applications display popover from BarButtonItem. FPPopOverController doesn't support this. So, in my opinion you should use: WYPopOverController

Answer 4

That's b/c UIBarButtonItem inherits from UIBarItem and NSObject. Only UI elements that inherit from UIView have superview properties.