1天学习1个类 UIBarButtomItem 类 示例

先看演示后面直接发代码部分.

没有全部测试完API,部分测试代码注释.大家可以自己测试.

示例全部采用代码实现..

新建工程->empty application

删除Applegate.h和Applegate.m 修改main.m文件.粘贴下面代码

////  main.m//  ControlDemo////  Created by watsy0007 on 12-6-3.//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.//#import <UIKit/UIKit.h>@interface ViewController : UIViewController @property (nonatomic) NSInteger nDepth;@end@implementation ViewController@synthesize nDepth = _nDepth;- (id) init {    if (self = [super init]) {        _nDepth = 0;    }    return self;}- (void) BarButtonItemAction:(id) sender {    if (_nDepth == 0) {        ViewController *vc = [[ViewController alloc] init];        vc.nDepth = self.nDepth + 1;        [self.navigationController pushViewController:vc animated:YES];        [vc release];    }}- (UIBarButtonItem *) createNewItemWith {    UIBarButtonItem *item;    //    item = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(BarButtonItemAction:)];    item = [[UIBarButtonItem alloc] initWithTitle:@"watsy0007" style:UIBarButtonItemStylePlain target:self action:@selector(BarButtonItemAction:)];        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];    view.backgroundColor = [UIColor blueColor];    //    item = [[UIBarButtonItem alloc] initWithCustomView:view];//    item.customView = view;    item.target = self;    item.action = @selector(BarButtonItemAction:);    item.style = UIBarButtonItemStylePlain;    item.tintColor = [UIColor colorWithRed:155.0 / 255.0                                      green:155.0 / 255.0                                       blue:155.0 / 255.0                                      alpha:0.7];        [item setTitle:@"push"];    //设置标题显示的位置    [[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setBackButtonTitlePositionAdjustment:UIOffsetMake(20, 5) forBarMetrics:UIBarMetricsDefault];        [view release];        return [item autorelease];}- (void) loadView {    [super loadView];    UILabel *label = [[UILabel alloc] initWithFrame:self.view.bounds];    label.numberOfLines = 3;    label.textAlignment = UITextAlignmentCenter;    label.text = @"watsy0007 \n QQ:258841679\n群:125807534";    [self.view addSubview:label];    [label release];        self.title = @"UIBarButtomItem Class Reference Demo";    if (self.nDepth == 0) {        self.navigationItem.rightBarButtonItem = [self createNewItemWith];    } }- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {    return YES;}- (void) viewDidLoad {    [super viewDidLoad];        }@end@interface AppDelegate : UIResponder <UIApplicationDelegate>@property (strong, nonatomic) UIWindow *window;@property (strong, nonatomic) UIViewController *viewController;@end@implementation AppDelegate@synthesize window = _window;@synthesize viewController = _viewController;- (void) dealloc {    [_window release];    [_viewController release];        [super dealloc];}- (BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {        self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];        self.viewController = [[ViewController alloc] init];        UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController:self.viewController];     self.window.rootViewController = controller;    [controller release];        [self.window makeKeyAndVisible];    return YES;}@endint main(int argc, char *argv[]){    @autoreleasepool {        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));    }}