NeroPopoverBackgroundView

gistfile1.m

//
//  NeroPopoverBackgroundView.m
//  poc
//
//  Created by Andrew Kolesnikov on 11/22/11.
//  Copyright (c) 2011 Isobar. All rights reserved.
//

#import "NeroPopoverBackgroundView.h"

@implementation NeroPopoverBackgroundView

@synthesize arrowOffset, arrowDirection;

-(id)initWithFrame:(CGRect)frame{
  if (self = [super initWithFrame:frame]) {
    _imageView = [[[UIImageView alloc] initWithImage:[[UIImage imageNamed:@"bg-popover.png"] resizableImageWithCapInsets: UIEdgeInsetsMake(40.0, 10.0, 30.0, 10.0)]] autorelease];
    _arrowView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bg-popover-arrow.png"]] autorelease];
    
    self.backgroundColor =  _arrowView.backgroundColor =  _imageView.backgroundColor = [UIColor clearColor];

    [self addSubview:_imageView];
    [self addSubview:_arrowView];
  }
  return self;
}

- (void)drawRect:(CGRect)rect {

}

-(void)layoutSubviews{

  if (arrowDirection == UIPopoverArrowDirectionUp) {  
  _imageView.frame = CGRectMake(0, [NeroPopoverBackgroundView arrowHeight], self.superview.frame.size.width, self.superview.frame.size.height - [NeroPopoverBackgroundView arrowHeight]);
    
  _arrowView.frame = CGRectMake(self.superview.frame.size.width / 2 + arrowOffset - [NeroPopoverBackgroundView arrowBase] / 2, 2, [NeroPopoverBackgroundView arrowBase], [NeroPopoverBackgroundView arrowHeight]);
  }
  
  if (arrowDirection == UIPopoverArrowDirectionRight) {  

    _imageView.frame = CGRectMake(0, 0, self.superview.frame.size.width - [NeroPopoverBackgroundView arrowHeight], self.superview.frame.size.height);
    
    _arrowView.image = [[UIImage alloc] initWithCGImage: _arrowView.image.CGImage
                                                         scale: 1.0
                                                   orientation: UIImageOrientationRight];
    
    
    _arrowView.frame = CGRectMake(self.superview.frame.size.width - [NeroPopoverBackgroundView arrowHeight] - 1, self.superview.frame.size.height / 2 + arrowOffset - [NeroPopoverBackgroundView arrowBase] / 2, [NeroPopoverBackgroundView arrowHeight], [NeroPopoverBackgroundView arrowBase]);
  }
}

+(UIEdgeInsets)contentViewInsets{
  return UIEdgeInsetsMake(5, 5, 5, 5);
}

+(CGFloat)arrowHeight{
  return 21.0;
}

+(CGFloat)arrowBase{
  return 35.0;
}

@end

akishnani: http://blog.andrewkolesnikov.com/custom-background-color-tint-for-uipopover-64835