UIViewController的生命周期：
1、运行APP
2、- (void)loadView
{
[super loadView];
}
3、- (void)viewDidLoad
{
[super viewDidLoad];
}
4、- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
5、 - (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
6、 - (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
7、 - (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
8、- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
1 UILabel标签:
2
3 #import <UIKit/UIKit.h>
4
5 @interface FirstViewController : UIViewController
6
7 @property (nonatomic, strong) UILabel *label;
8
9 @end
10
11
12 - (void)viewDidLoad
13 {
14 [super viewDidLoad];
15 _label =[[UILabel alloc] initWithFrame:CGRectMake(100, 50, 220, 40)];
16 _label.text = @"欢迎大家学习ios软件开发";
17 _label.textColor = [UIColor redColor];
18 [self.view addSubview:_label];
19
20 }
1 UIButton和UILable交互
2
3 #import "FirstViewController.h"
4 #import "GlobalDefine.h"
5 #import "SecondViewController.h"
6
7 @interface FirstViewController ()
8
9 @end
10
11 @implementation FirstViewController
12
13 - (void)loadView
14 {
15 [super loadView];
16
17 }
18
19 - (void)viewDidLoad
20 {
21 [super viewDidLoad];
22 _label =[[UILabel alloc] initWithFrame:CGRectMake(100, 50, 220, 40)];
23 _label.text = @"欢迎大家学习ios软件开发";
24 _label.tag = 1;
25 _label.textColor = [UIColor redColor];
26 [self.view addSubview:_label];
27
28 UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
29 button.frame = CGRectMake(SCREENWIDTH - 90, SCREENHEIGHT - 60, 80, 40);
30 [button setTitle:@"下一页" forState:UIControlStateNormal];
31 [self.view addSubview:button];
32
33 //跳转
34 [button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
35 }
36
37 - (void)next:(id)sender
38 {
39 SecondViewController *tempVC = [[SecondViewController alloc] init];
40
41 [self presentViewController:tempVC animated:YES completion:nil];
42 }
43
44 - (void)viewWillAppear:(BOOL)animated
45 {
46 [super viewWillAppear:animated];
47 if (_label.tag != 1)
48 {
49 _label.text = @"HAHAHAHA";
50 }
51 else
52 _label.tag = 0;
53
54 }
55
56 #import "SecondViewController.h"
57 #import "GlobalDefine.h"
58
59 @interface SecondViewController ()
60
61 @end
62
63 @implementation SecondViewController
64
65 - (void)viewDidLoad {
66 [super viewDidLoad];
67
68
69 UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
70 button.frame = CGRectMake(20, 20, 50, 40);
71 [button setTitle:@"返回" forState:UIControlStateNormal];
72
73 [button setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];
74
75 [self.view addSubview:button];
76
77 //跳转
78 [button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
79 }
80
81 - (void)next:(id)sender
82 {
83
84 [self dismissViewControllerAnimated:YES completion:nil];
85 }
1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
2
3 self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
4 self.window.rootViewController = [[ViewController alloc] init];
5 self.window.backgroundColor = [UIColor grayColor];
6 [self.window makeKeyAndVisible];
7
8 return YES;
9 }
10
11 #import <UIKit/UIKit.h>
12
13 @interface ViewController : UIViewController
14
15 @property (nonatomic, strong) UILabel *label;
16 @property (nonatomic, strong) UIButton *button;
17
18 @end
19
20 #import "ViewController.h"
21 #import "GlobalDefine.h"
22 #import "SecondViewController.h"
23
24 @interface ViewController ()
25
26 @end
27
28 @implementation ViewController
29
30 - (void)viewDidLoad
31 {
32 [super viewDidLoad];
33 _label = [[UILabel alloc] initWithFrame:CGRectMake(SCREENWIDTH / 2 - 150, SCREENHEIGHT / 2 - 15, 300, 30)];
34 _label.text = @"北京，你好！HELLO";
35 _label.tag = 1;
36 _label.textColor = [UIColor whiteColor];
37 _label.font = [UIFont systemFontOfSize:22];
38 _label.font = [UIFont boldSystemFontOfSize:23];
39 _label.font = [UIFont italicSystemFontOfSize:25];
40 _label.textAlignment = NSTextAlignmentCenter;
41 [self.view addSubview:_label];
42
43 _button = [UIButton buttonWithType:UIButtonTypeSystem];
44 [_button setTitle:@"Next" forState:UIControlStateNormal];
45 _button.frame = CGRectMake(SCREENWIDTH - 80, SCREENHEIGHT - 50, 60, 30);
46 [_button setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];
47 _button.titleLabel.font = [UIFont systemFontOfSize:20];//设置按钮字体大小
48 [self.view addSubview:_button];
49
50 //跳转
51 [_button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
52 }
53
54 - (void)next:(id)sender
55 {
56 SecondViewController *tempVC = [[SecondViewController alloc] init];
57 [self presentViewController:tempVC animated:YES completion:nil];
58 }
59
60 - (void)viewWillAppear:(BOOL)animated
61 {
62 if (_label.tag != 1)
63 {
64 _label.text = @"VIP";
65 }
66 else
67 {
68 _label.tag = 0;
69 }
70 }
71
72 - (void)didReceiveMemoryWarning {
73 [super didReceiveMemoryWarning];
74 // Dispose of any resources that can be recreated.
75 }
76
77 @end
78
79 #import "SecondViewController.h"
80 #import "GlobalDefine.h"
81
82 @interface SecondViewController ()
83
84 @end
85
86 @implementation SecondViewController
87
88 - (void)viewDidLoad {
89 [super viewDidLoad];
90 UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(SCREENWIDTH / 2 - 130, SCREENHEIGHT / 2 - 20, 260, 40)];
91 label.font = [UIFont systemFontOfSize:21];
92 label.text = @"IOS is so easy! most of practice";
93 label.textColor = [UIColor greenColor];
94 [self.view addSubview:label];
95
96 UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
97 button.frame = CGRectMake(SCREENWIDTH - 100, SCREENHEIGHT - 50, 80, 30);
98 [button setTitle:@"返回" forState:UIControlStateNormal];
99 [button setTintColor:[UIColor whiteColor]];
100 button.titleLabel.font = [UIFont systemFontOfSize:16];
101 [self.view addSubview:button];
102
103 //跳转
104 [button addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];
105
106 }
107
108 - (void)back:(id)sender
109 {
110 [self dismissViewControllerAnimated:YES completion:nil];
111 }
112
113 - (void)didReceiveMemoryWarning {
114 [super didReceiveMemoryWarning];
115 // Dispose of any resources that can be recreated.
116 }
117
118 /*
119 #pragma mark - Navigation
120
121 // In a storyboard-based application, you will often want to do a little preparation before navigation
122 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
123 // Get the new view controller using [segue destinationViewController].
124 // Pass the selected object to the new view controller.
125 }
126 */
127
128 @end
129
130
131 #ifndef GlobalDefine_h
132 #define GlobalDefine_h
133
134 #define SCREENWIDTH [UIScreen mainScreen].bounds.size.width
135 #define SCREENHEIGHT [UIScreen mainScreen].bounds.size.height
136
137 #endif /* GlobalDefine_h */
时间： 2024-11-06 06:38:19