UIWebView AddressBar Scroll

BrowserView.h

#import <UIKit/UIKit.h>

@interface BrowserView : UIView <UIWebViewDelegate, UIScrollViewDelegate> {

  UINavigationBar *addressBar_;

  UIWebView *webView_;

}

@property (nonatomic, readonly) UINavigationBar *addressBar;

@property (nonatomic, readonly) UIWebView *webView;

@end

BrowserView.m

#import ”BrowserView.h”

@interface BrowserView(Private)

- (void)clearAddressBar;

- (void)clearWebView;

@end

#define kHeightOfAddressBar 52.0f

@implementation BrowserView

@synthesize addressBar = addressBar_;

@synthesize webView = webView_;

#pragma mark - Initialize

- (id)initWithFrame:(CGRect)frame

{

  self = [super initWithFrame:frame];

  if (self) {

    [self clearAddressBar];

    CGRect frameOfAddressBar = CGRectMake(0, -kHeightOfAddressBar, self.frame.size.width, kHeightOfAddressBar);

    addressBar_ = [[UINavigationBar alloc] initWithFrame:frameOfAddressBar];

    addressBar_.autoresizingMask = (UIViewAutoresizingFlexibleWidth);

    [self clearWebView];

    webView_ = [[UIWebView alloc] initWithFrame:self.bounds];

    webView_.delegate = self;

    webView_.autoresizingMask = (UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight);

    for (id subview in webView_.subviews) {

      if ([subview isKindOfClass:[UIScrollView class]]) {

        UIScrollView *scrollView = (UIScrollView *)subview;

        scrollView.delegate = self;

        scrollView.contentInset = UIEdgeInsetsMake(frameOfAddressBar.size.height, 0, 0, 0);

        [scrollView setContentOffset:CGPointMake(0, frameOfAddressBar.origin.y) animated:NO];

        [scrollView addSubview:addressBar_];

      }

    }

    [webView_ loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@”http://www.google.com”]]];

    [self addSubview:webView_];

  }

  return self;

}

#pragma mark - Memory management

- (void)dealloc

{

  [self clearAddressBar];

  [self clearWebView];

  [super dealloc];

}

#pragma mark - Address Bar

- (void)clearAddressBar

{

  [addressBar_ release], addressBar_ = nil;

}

#pragma mark - Web view

- (void)clearWebView

{

  if (webView_ != nil) {

    webView_.delegate = nil;

  }

  [webView_ release], webView_ = nil;

}

#pragma mark - Web view delegate

- (void)webViewDidFinishLoad:(UIWebView *)webView

{

  for (id subview in webView.subviews) {

    if ([subview isKindOfClass:[UIScrollView class]]) {

      UIScrollView *scrollView = (UIScrollView *)subview;

      [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];

    }

  }

}

#pragma mark - Scroll view delegate

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

  if (scrollView.contentOffset.y < 0) {

    UIEdgeInsets insects = scrollView.scrollIndicatorInsets;

    insects.top = -scrollView.contentOffset.y;

    scrollView.scrollIndicatorInsets = insects;

  }

}

@end