自定义UINavgationBar 方法一（原创）

下面是定义UINavgationBar的static函数

+ (UINavigationBar *)createNavigationBarWithBackgroundImage:(UIImage *)backgroundImage title:(NSString *)title {
	UINavigationBar *customNavigationBar = [[[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)] autorelease];
	UIImageView *navigationBarBackgroundImageView = [[UIImageView alloc] initWithImage:backgroundImage];
	[customNavigationBar addSubview:navigationBarBackgroundImageView];
	UINavigationItem *navigationTitle = [[UINavigationItem alloc] initWithTitle:title];
	[customNavigationBar pushNavigationItem:navigationTitle animated:NO];
	[navigationTitle release];
	[navigationBarBackgroundImageView release];
	
	return customNavigationBar;
}

下面是在需要生成UINavgationBar 的地方添加的代码     *ViewController.m：

self.navigationController.navigationBar.hidden = YES;
	UIImage *navigationBarBackgroundImage =[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"topbar-bg" ofType:@"png"]];
	UINavigationBar *customNavigationBar = [YOUR_Util_Class createNavigationBarWithBackgroundImage:navigationBarBackgroundImage title:nil];
	[self.view addSubview:customNavigationBar];
	
	UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 75.0, 30.0)];
	if (_backButtonImage) {
		[backButton setImage:_backButtonImage forState:UIControlStateNormal];
	}else {
		[backButton setImage:[UIImage imageNamed:@"btnback.png"] forState:UIControlStateNormal];
	}

	[backButton addTarget:self action:@selector(backButtonCliked:) forControlEvents:UIControlEventTouchUpInside];
	UIBarButtonItem *backBarButton = [[UIBarButtonItem alloc] initWithCustomView:backButton];
	customNavigationBar.topItem.leftBarButtonItem = backBarButton;	
	[backButton release];
	[backBarButton release];
	
	UIButton *addButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 43, 30)];
	UIBarButtonItem *addBarButton = [[UIBarButtonItem alloc] initWithCustomView:addButton];
	if (_isFromFavorites) {
		[addButton setImage:[UIImage imageNamed:@"btn-delete-0.png"] forState:UIControlStateNormal];
		[addButton addTarget:self action:@selector(deleteButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
	}else {
		[addButton setImage:[UIImage imageNamed:@"btn_add.png"] forState:UIControlStateNormal];
		[addButton addTarget:self action:@selector(addButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
	}
	customNavigationBar.topItem.rightBarButtonItem = addBarButton;
	[addButton release];
	[addBarButton release];

效果图如下：