1，创建并使用一个UINavigationController UINavigationController *aNav = [[UINavigationController alloc] init];然后添加一个视图进去，否则导航栏也没有意义的 UIViewController *aViewCtrl = [[UIView alloc] initWithNibName: (*xib文件名*)];[aNav pushViewController:aViewCtrl animated:NO];//导航栏的第一个视图不要动画化aViewCtrl.title = @"标题"; //设置其标题：2，设置导航栏的左右按钮：设置导航栏的按钮并不是去设置导航栏本身，而是当时被导航的视图控制器，比如我们对aView作设置。//配置一个按钮，我这里是《我的佛典》上的代码UIBarButtonItem *callModalViewButton = [[UIBarButtonItem alloc] initWithTitle:@"经文" style:UIBarButtonItemStyleBordered target:self action:@selector(callModalList)];self.navigationItem.leftBarButtonItem = callModalViewButton;[callModalViewButton release]; //由于本地视图会retain它，所以我们可以release了 可以看到，还是很简单的嘛。3，其他常用方法和属性：本地视图.navigationItem.leftBarButtonItem //左边栏项目本地视图.navigationItem.rightBarButtonItem //右边栏项目本地视图.navigationItem.backBarButtonItem //后退栏项目本地视图.navigationItem.hidesBackButton //隐藏后退按钮（YES or NO）在视图的viewWillAppear:方法中添加:[self.tableView reloadData]; 不起作用，viewWillAppear:这个方法根本没有调用,后来发现原来用了UINavigationController后，viewWillAppear方法是没有效果的，要用UINavigationControllerDelegate的– navigationController:willShowViewController:animated:方法才可以达到这个目的。所以要做到这个，你必须做以下几步：1. 设置代理类nav.delegate = self; 2. 代理类实现UINavigationControllerDelegate Protocol3. 在代理类中添加– navigationController:willShowViewController:animated:方法如：- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{ [self.myTableView reloadData];}pushViewController:viewController animated:BOOL（加载视图控制器）– 添加指定的视图控制器并予以显示，后接：是否动画显示popViewControllerAnimated:BOOL（弹出当前视图控制器）– 弹出并向左显示前一个视图popToViewController:viewController animated:BOOL（弹出到指定视图控制器）– 回到指定视图控制器， 也就是不只弹出一个popToRootViewControllerAnimated:BOOL（弹出到根视图控制器）– 比如说你有一个“Home”键，也许就会实施这个方法了。setNavigationBarHidden:BOOL animated:BOOL（设置导航栏是否显示）– 如果你想隐藏导航栏，这就是地方了。参照Picasa的WebApp样式，现pushViewController:animated:的不同页面转换特效1. 首先要明确的是,不使用pushViewController的默认动画,所以在调用这个函数时,要将animated设置为NO.2. 使用普通的来CATransition实现转换效果,代码如下:CATransition *animation = [CATransition animation];[animation setDuration:0.3];[animation setType: kCATransitionMoveIn];[animation setSubtype: kCATransitionFromTop];[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];[self.navigationController pushViewController:m_poseAddIssueViewController animated:NO];[self.navigationController.view.layer addAnimation:animation forKey:nil];经常要在导航栏中添加各种样式的按钮，添加一个按钮很简单，代码如下图：UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc]initWithTitle:@"Setting"style:UITabBarSystemItemContacts target:selfaction:@selector(clickSettings:)]; self.navigationItem.rightBarButtonItem =anotherButton; [anotherButton release];其中按钮的样式可以有多种，具体的可以参考：https://developer.apple.com/library/ios/prerelease/#documentation/UIKit/Reference/UIBarButtonItem_Class/在有些项目中要在右面添加两个按钮，实现的样式如下图：image 实现的代码如下图：UIToolbar* tools = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 150, 45)];//使用一个容器去装载多个UIBarButtonItem是实现多个按钮的最核心的部分[tools setTintColor:[self.navigationController.navigationBartintColor]]; [tools setAlpha:[self.navigationController.navigationBaralpha]]; NSMutableArray* buttons = [[NSMutableArray alloc]initWithCapacity:2];UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(clickSettings:)];UIBarButtonItem *anotherButton1 = [[UIBarButtonItem alloc]initWithTitle:@"Edit"style:UITabBarSystemItemContacts target:self action:@selector(clickEdit:)]; [buttons addObject:anotherButton]; [anotherButton release]; [buttons addObject:anotherButton1]; [anotherButton1 release]; [tools setItems:buttons animated:NO]; [buttons release]; UIBarButtonItem *myBtn = [[UIBarButtonItem alloc]initWithCustomView:tools]; self.navigationItem.rightBarButtonItem = myBtn;[myBtn release]; [tools release];隐藏当前页的navigationBar： [self.navigationController setNavigationBarHidden:YES animated:YES]; 给 UINavigationBar 设置背景图片方法1：+ (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;｝调用的时候：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];方法2：利用objective-c的Category语法扩展UINavigationBar 类具体代码为@implementation UINavigationBar(UINavigationBarCategory)- (void)drawRect:(CGRect)rect { // Drawingcode UIImage *img = [UIImage imageNamed:@"navbar_background.png"];CGPoint point = {0,0};[img drawAtPoint:point];}@end 方法3：@implementation UINavigationBar(UINavigationBarCategory) - (void)drawRect:(CGRect)rect {//加入旋转坐标系代码 // Drawing codeUIImage *navBarImage =[UIImage imageNamed:@"LOGO_320×44.png"];CGContextRef context= UIGraphicsGetCurrentContext();CGContextTranslateCTM(context, 0.0, self.frame.size.height);CGContextScaleCTM(context, 1.0,-1.0);CGPoint center=self.center; CGImageRef cgImage= CGImageCreateWithImageInRect(navBarImage.CGImage,CGRectMake(0, 0, 1, 44));CGContextDrawImage(context, CGRectMake(center.x-160-80, 0, 80,self.frame.size.height),cgImage);CGContextDrawImage(context, CGRectMake(center.x-160, 0, 320,self.frame.size.height),navBarImage.CGImage);CGContextDrawImage(context, CGRectMake(center.x+160, 0, 80,self.frame.size.height),cgImage);}@endold codeCGContextDrawImage(context, CGRectMake(0, 0, self.frame.size.width,self.frame.size.height),navBarImage.CGImage);方法4：有了这个,你还会扩展drawRect自定义导航栏背景吗?查了很多资料,网上的自定义导航栏的方法,清一色的是扩展navigationBar的drawRect方法.然而这样的扩展会影响到工程里所有的navigationBar.或许你并不想这么做,而且很多不合常规的UI用这种方法根本没法实现.做了无数实验,尝试了各种方法,今天跟大家分享一个新方法:#import@interface DDNavigationViewController: UINavigationController{
CALayer *_barBackLayer;
}
@end
@implementation DDNavigationViewController
- (id)initWithRootViewController:(UIViewController *)rootViewController{
self =[super initWithRootViewController:rootViewController];
self.delegate = self;
return self;
}
- (void)loadView{
[super loadView];
UINavigationBar *bar= self.navigationBar;
CALayer*layer= [CALayer layer];
UIImage *navBarImage= [UIImage imageNamed:@"navigationBarBackground.png"];
layer.contents =(id)navBarImage.CGImage;
layer.frame= CGRectMake(0,0, 320,navBarImage.size.height);
[bar.layer insertSublayer:layer atIndex:0];
_barBackLayer =layer;
}
#pragma mark -
#pragma mark UINavigationControllerDelegate
- (void)navigationController:(UINavigationController *)navigationControllerdidShowViewController:(UIViewController *)viewControlleranimated:(BOOL)animated{
[_barBackLayer removeFromSuperlayer];
[navigationController.navigationBar.layer insertSublayer:_barBackLayeratIndex:0];
}
@end
