ios-使用模态视图

2014年09月07日 11:45:25

阅读数：1098

// 模态视图关键的两个方法：

// presentViewController: animated: completion: 呈现模态视图

// dismissViewControllerAnimated: completion: 关闭模态视图

iPhone模态视图，代码实现如下：

 

1.  
   - (void)dealloc
2.  
   {
3.  
    
4.  
   [self.textField release];
5.  
   [super dealloc];
6.  
    
7.  
   // 取消观察者
8.  
   [[NSNotificationCenter defaultCenter] removeObserver:self];
9.  
   }
10.  
     
11.  
    - (void)viewDidLoad
12.  
    {
13.  
    [super viewDidLoad];
14.  
    self.view.backgroundColor = [UIColor grayColor];
15.  
     
16.  
    // 注册观察者
17.  
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handle:) name:@"registerBroadcastMessage" object:nil];
18.  
     
19.  
    [self initUI];
20.  
    }
21.  
     
22.  
    - (void)initUI
23.  
    {
24.  
    UILabel *label = [[UILabel alloc]init];
25.  
    label.frame = CGRectMake(20, 50, 70, 30);
26.  
    label.backgroundColor = [UIColor clearColor];
27.  
    label.text = @"用户ID:";
28.  
    [self.view addSubview:label];
29.  
    [label release];
30.  
     
31.  
    UITextField *txtField = [[UITextField alloc] initWithFrame:CGRectMake(100, 50, 200, 30)];
32.  
    txtField.backgroundColor = [UIColor whiteColor];
33.  
    txtField.borderStyle = UITextBorderStyleRoundedRect;
34.  
    txtField.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
35.  
    txtField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
36.  
    [self.view addSubview:txtField];
37.  
    [txtField release];
38.  
     
39.  
    self.textField = txtField;
40.  
     
41.  
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
42.  
    btn.frame = CGRectMake(20, 100, 280, 40);
43.  
    [btn setTitle:@"注册" forState:UIControlStateNormal];
44.  
    [btn addTarget:self action:@selector(registerOnClick:) forControlEvents:UIControlEventTouchUpInside];
45.  
    [self.view addSubview:btn];
46.  
    }
47.  
     
48.  
    - (void)registerOnClick:(id)sender
49.  
    {
50.  
    RegisterViewController *registerViewCtl = [[RegisterViewController alloc] init];
51.  
    registerViewCtl.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
52.  
    [self presentViewController:registerViewCtl animated:YES completion:nil];
53.  
    [registerViewCtl release];
54.  
     
55.  
    // 模态视图关键的两个方法：
56.  
    // presentViewController: animated: completion: 呈现模态视图
57.  
    // dismissViewControllerAnimated: completion: 关闭模态视图
58.  
     
59.  
    // modalTransitionStyle
60.  
    /*
61.  
    UIModalTransitionStyleCoverVertical 呈现时，沿垂直方向由底向上
62.  
    UIModalTransitionStyleFlipHorizontal 呈现时，水平翻转
63.  
    UIModalTransitionStyleCrossDissolve 呈现时，两个视图淡入淡出
64.  
    UIModalTransitionStylePartialCurl 呈现时，模态视图卷起边角
65.  
    */
66.  
    }
67.  
     
68.  
    - (void)handle:(NSNotification *)notifi
69.  
    {
70.  
    NSDictionary *dict = [notifi userInfo];
71.  
    NSString *str = [dict objectForKey:@"username"];
72.  
    self.textField.text = str;
73.  
    }

 

1.  
   //
2.  
   // registerViewController.h
3.  
   //
4.  
   #import <UIKit/UIKit.h>
5.  
    
6.  
   @interface RegisterViewController : UIViewController
7.  
    
8.  
   @property (strong, nonatomic) UITextField *textField;
9.  
    
10.  
    @end

1.  
   //
2.  
   // registerViewController.m
3.  
   //
4.  
   #import "RegisterViewController.h"
5.  
    
6.  
   @interface RegisterViewController ()
7.  
    
8.  
   @end
9.  
    
10.  
    @implementation RegisterViewController
11.  
     
12.  
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
13.  
    {
14.  
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
15.  
    if (self)
16.  
    {
17.  
     
18.  
    }
19.  
    return self;
20.  
    }
21.  
     
22.  
    - (void)dealloc
23.  
    {
24.  
    [self.textField release];
25.  
    [super dealloc];
26.  
    }
27.  
     
28.  
    - (void)viewDidLoad
29.  
    {
30.  
    [super viewDidLoad];
31.  
    self.view.backgroundColor = [UIColor grayColor];
32.  
     
33.  
    [self initUI];
34.  
    }
35.  
     
36.  
    - (void)initUI
37.  
    {
38.  
    UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)]; // ios 7 -> 64
39.  
    [self.view addSubview:navBar];
40.  
    [navBar release];
41.  
     
42.  
    UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:@"注册"];
43.  
    [navBar pushNavigationItem:navItem animated:YES];
44.  
    [navItem release];
45.  
     
46.  
    UIBarButtonItem *barBtnLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneOnClick:)];
47.  
    navItem.leftBarButtonItem = barBtnLeft;
48.  
    [barBtnLeft release];
49.  
     
50.  
     
51.  
    UIBarButtonItem *barBtnRight = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:self action:@selector(saveOnClick:)];
52.  
    navItem.rightBarButtonItem = barBtnRight;
53.  
    [barBtnRight release];
54.  
     
55.  
    UILabel *label = [[UILabel alloc]init];
56.  
    label.frame = CGRectMake(20, 80, 70, 30);
57.  
    label.backgroundColor = [UIColor clearColor];
58.  
    label.text = @"用户ID:";
59.  
    [self.view addSubview:label];
60.  
    [label release];
61.  
     
62.  
    UITextField *txtField = [[UITextField alloc] initWithFrame:CGRectMake(100, 80, 200, 30)];
63.  
    txtField.backgroundColor = [UIColor whiteColor];
64.  
    txtField.borderStyle = UITextBorderStyleRoundedRect;
65.  
    txtField.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
66.  
    txtField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
67.  
    [self.view addSubview:txtField];
68.  
    [txtField release];
69.  
     
70.  
    self.textField = txtField;
71.  
    }
72.  
     
73.  
    - (void)doneOnClick:(id)sender
74.  
    {
75.  
    [self dismissViewControllerAnimated:YES completion:nil];
76.  
    }
77.  
     
78.  
    - (void)saveOnClick:(id)sender
79.  
    {
80.  
    NSDictionary *dict = nil;
81.  
    if (self.textField.text.length)
82.  
    {
83.  
    dict = [NSDictionary dictionaryWithObject:self.textField.text forKey:@"username"];
84.  
    [self dismissViewControllerAnimated:YES completion:nil];
85.  
    [[NSNotificationCenter defaultCenter] postNotificationName:@"registerBroadcastMessage" object:nil userInfo:dict];
86.  
    }
87.  
    else
88.  
    return;
89.  
    }
90.  
     
91.  
    - (void)didReceiveMemoryWarning
92.  
    {
93.  
    [super didReceiveMemoryWarning];
94.  
    }
95.  
     
96.  
    @end

至此，代码实现iPhone模态视图已经介绍完毕，程序运行效果图如下：

      

 

 

iPad模态视图，iPad模态视图和iPad模态视图只是一点点的差异，差异的只是UIModalPresentationFullScreen，代码实现如下：

 

1.  
   - (void)clickBtn:(id)sender
2.  
   {
3.  
   ModalViewController *modalViewCtl = [[ModalViewController alloc] init];
4.  
   modalViewCtl.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
5.  
    
6.  
   switch (iSelect)
7.  
   {
8.  
   case 0:
9.  
   modalViewCtl.modalPresentationStyle = UIModalPresentationFullScreen;
10.  
    break;
11.  
    case 1:
12.  
    modalViewCtl.modalPresentationStyle = UIModalPresentationPageSheet;
13.  
    break;
14.  
    case 2:
15.  
    modalViewCtl.modalPresentationStyle = UIModalPresentationFormSheet;
16.  
    break;
17.  
    case 3:
18.  
    modalViewCtl.modalPresentationStyle = UIModalPresentationCurrentContext;
19.  
    break;
20.  
    default:
21.  
    break;
22.  
    }
23.  
     
24.  
    [self presentViewController:modalViewCtl animated:YES completion:nil];
25.  
    }

至此，代码实现iPad模态视图已经介绍完毕，程序运行效果图如下：

   

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