////  main.m//  Hello////  Created by lishujun on 14-8-28.//  Copyright (c) 2014年 lishujun. All rights reserved.//#import <UIKit/UIKit.h>@interface TestViewController : UIViewController@end@implementation TestViewController-(void) loadView{    NSLog(@"load View");    //创建视图对象    UIView *contentView = [[UIView alloc]initWithFrame:[[UIScreen mainScreen] applicationFrame]];    contentView.backgroundColor = [UIColor lightGrayColor];    self.view = contentView;}@end// --------------视图控制器对象--------------@interface HelloWorldViewController : UIViewController{    UIToolbar *toolBar;}@end@implementation HelloWorldViewController-(void) loadView{    NSLog(@"load View");    //创建视图对象    UIView *contentView = [[UIView alloc]initWithFrame:[[UIScreen mainScreen] applicationFrame]];    contentView.backgroundColor = [UIColor lightGrayColor];    self.view = contentView;        //设置工具栏并显示    [self setNavBarAndShow];    [self setUserToolBarAndShow];}//-----------设置导航栏并显示------------------(void) setNavBarAndShow{    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStylePlain target:self action:@selector(pushView:)];    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Prev" style:UIBarButtonItemStylePlain target:self action:@selector(popView:)];    [self.navigationController setNavigationBarHidden:NO]; // 显示之前隐藏的导航栏}-(void) pushView:(id)sender{    NSLog(@"push view");    [self.navigationController pushViewController:[[TestViewController alloc]init] animated:YES];}-(void) popView:(id)sender{    NSLog(@"pop view");    [self.navigationController popViewControllerAnimated:YES];}//------------设置工具栏并显示---------------(void) setNavToolBarAndShow{    // 设置NavigationController上的工具栏并显示    UIBarButtonItem *one = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];    UIBarButtonItem *two = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:nil action:nil];    UIBarButtonItem *three = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:nil action:nil];    UIBarButtonItem *four = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:nil action:nil];    UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];    [self setToolbarItems:[NSArray arrayWithObjects:flexItem, one, flexItem, two, flexItem, three, flexItem, four, flexItem, nil]];        [self.navigationController setToolbarHidden:NO animated:NO];}-(void) setUserToolBarAndShow{    //设置自定义的toolbal    [self.navigationController  setToolbarHidden:YES animated:YES];        UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:nil action:nil];    toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0, self.view.frame.size.height - toolBar.frame.size.height - 44.0, self.view.frame.size.width, 44.0)];    [toolBar setBarStyle:UIBarStyleDefault];    toolBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;    [toolBar setItems:[NSArray arrayWithObject:addButton]];    [self.view addSubview:toolBar];}@end// ----------------委托对象--------------------@interface HelloWorldAppDelegate : NSObject <UIApplicationDelegate>{    IBOutlet UIWindow *window;}@property (nonatomic, retain) UIWindow *window;@property (nonatomic, retain) UINavigationController *nav;@end@implementation HelloWorldAppDelegate@synthesize window;@synthesize nav;-(void) applicationDidFinishLaunching:(UIApplication *)application{    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]bounds]];    HelloWorldViewController *viewController = [[HelloWorldViewController alloc]init];        self.nav = [[UINavigationController alloc]initWithRootViewController: viewController];    [self.nav setNavigationBarHidden:YES];        //隐藏导航栏，位于视图顶部    [self.nav setToolbarHidden:YES];              //隐藏工具栏，位于视图底部        self.window.rootViewController = self.nav;    [self.window makeKeyAndVisible];}@end// ---------------程序入口---------------------int main(int argc, char * argv[]){    @autoreleasepool {        return UIApplicationMain(argc, argv, nil, @"HelloWorldAppDelegate");    }}