034在屏幕中显示一个工具条

1 #import <UIKit/UIKit.h>
2 
3 @interface ViewController : UIViewController
4 @end

 1 #import "ViewController.h"
 2 
 3 @interface ViewController ()
 4 - (void)nextDidPush;
 5 @end
 6 
 7 @implementation ViewController
 8 
 9 - (void)viewDidLoad {
10     NSLog(@"ViewController viewDidLoad");
11     [super viewDidLoad];
12     
13     //注意如果是作为父类有继承关系的话，不能封装执行代码为方法；因为加载子类时不会再进一步执行封装的方法
14     //[self layoutUI];
15     self.view.backgroundColor = [UIColor whiteColor];
16     UIButton *btnNext = [UIButton buttonWithType:UIButtonTypeRoundedRect];
17     btnNext.frame = CGRectMake(0, 0, 150, 40);
18     CGPoint newPoint = self.view.center;
19     newPoint.y += 10;
20     btnNext.center = newPoint;
21     btnNext.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;
22     btnNext.layer.masksToBounds = YES;
23     btnNext.layer.cornerRadius = 10.0;
24     btnNext.layer.borderColor = [UIColor colorWithRed:0.275f green:0.641f blue:0.840f alpha:1.00f].CGColor;
25     btnNext.layer.borderWidth = 2.0;
26     [btnNext setTitle:@"下一画面" forState:UIControlStateNormal];
27     [btnNext addTarget:self action:@selector(nextDidPush) forControlEvents:UIControlEventTouchUpInside];
28     [self.view addSubview:btnNext];
29 }
30 
31 - (void)didReceiveMemoryWarning {
32     [super didReceiveMemoryWarning];
33     // Dispose of any resources that can be recreated.
34 }
35 
36 - (void)nextDidPush {
37     ViewController *nextViewController = [[ViewController alloc] init];
38     //定义为静态变量，属于类变量；保证多次创建对象实例并调用此方法时，下面if语句只执行一次
39     static BOOL isFirst = YES;
40     if (isFirst) {
41         nextViewController.hidesBottomBarWhenPushed = YES;
42         isFirst = NO;
43     }
44     [self.navigationController pushViewController:nextViewController animated:YES];
45 }
46 
47 @end

1 #import <UIKit/UIKit.h>
2 
3 #import "ViewController.h"
4 @interface CustomToolbar : ViewController
5 @end

 1 #import "CustomToolbar.h"
 2 
 3 @interface CustomToolbar ()
 4 - (void)layoutUI;
 5 - (void)buttonDidPush:(UIBarButtonItem *)sender;
 6 @end
 7 
 8 @implementation CustomToolbar
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     [self layoutUI];
14 }
15 
16 - (void)didReceiveMemoryWarning {
17     [super didReceiveMemoryWarning];
18     // Dispose of any resources that can be recreated.
19 }
20 
21 - (void)viewWillAppear:(BOOL)animated {
22     [super viewWillAppear:animated];
23     [self.navigationController setNavigationBarHidden:NO animated:YES];
24     [self.navigationController setToolbarHidden:NO animated:YES];
25 }
26 
27 - (void)layoutUI {
28     self.title = @"CustomToolbar";
29     //工具条左侧按钮
30     UIBarButtonItem *barBtnItemLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(buttonDidPush:)];
31     barBtnItemLeft.tag = 1;
32     
33     //工具条中间自动伸缩空白填充按钮
34     UIBarButtonItem *barBtnItemSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
35     //工具条右侧按钮
36     UIBarButtonItem *barBtnItemRight = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemUndo target:self action:@selector(buttonDidPush:)];
37     barBtnItemRight.tag = 2;
38     
39     [self setToolbarItems:@[barBtnItemLeft, barBtnItemSpacer, barBtnItemRight] animated:YES];
40 }
41 
42 - (void)buttonDidPush:(UIBarButtonItem *)sender {
43    UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"标题信息"
44                                                     message:sender.tag == 1 ? @"工具条左侧按钮触发" : @"工具条右侧按钮触发"
45                                                    delegate:nil
46                                           cancelButtonTitle:nil
47                                           otherButtonTitles:@"确定", nil];
48     [alertV show];
49 }
50 
51 @end

1 #import <UIKit/UIKit.h>
2 
3 @interface AppDelegate : UIResponder <UIApplicationDelegate>
4 @property (strong, nonatomic) UIWindow *window;
5 @property (strong, nonatomic) UINavigationController *navigationController;
6 
7 @end

 1 #import "AppDelegate.h"
 2 #import "ViewController.h"
 3 #import "CustomToolbar.h"
 4 
 5 @interface AppDelegate ()
 6 @end
 7 
 8 @implementation AppDelegate
 9 
10 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
11     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
12     CustomToolbar *customToolbar = [[CustomToolbar alloc] init];
13     _navigationController = [[UINavigationController alloc] initWithRootViewController:customToolbar];
14     _window.rootViewController = _navigationController;
15     [_window addSubview:_navigationController.view];
16     [_window makeKeyAndVisible];
17     return YES;
18 }
19 
20 - (void)applicationWillResignActive:(UIApplication *)application {
21 }
22 
23 - (void)applicationDidEnterBackground:(UIApplication *)application {
24 }
25 
26 - (void)applicationWillEnterForeground:(UIApplication *)application {
27 }
28 
29 - (void)applicationDidBecomeActive:(UIApplication *)application {
30 }
31 
32 - (void)applicationWillTerminate:(UIApplication *)application {
33 }
34 
35 @end