iOS基础控件随笔代码

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];

}

UILabel标签:

#import <UIKit/UIKit.h>

@interface FirstViewController : UIViewController

@property (nonatomic, strong) UILabel *label;

@end


- (void)viewDidLoad
{
    [super viewDidLoad];
    _label =[[UILabel alloc] initWithFrame:CGRectMake(100, 50, 220, 40)];
    _label.text = @"欢迎大家学习ios软件开发";
    _label.textColor = [UIColor redColor];
    [self.view addSubview:_label];
    
}

UIButton和UILable交互

#import "FirstViewController.h"
#import "GlobalDefine.h"
#import "SecondViewController.h"

@interface FirstViewController ()

@end

@implementation FirstViewController

- (void)loadView
{
    [super loadView];

}

- (void)viewDidLoad
{
    [super viewDidLoad];
    _label =[[UILabel alloc] initWithFrame:CGRectMake(100, 50, 220, 40)];
    _label.text = @"欢迎大家学习ios软件开发";
    _label.tag = 1;
    _label.textColor = [UIColor redColor];
    [self.view addSubview:_label];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(SCREENWIDTH - 90, SCREENHEIGHT - 60, 80, 40);
    [button setTitle:@"下一页" forState:UIControlStateNormal];
    [self.view addSubview:button];
    
    //跳转
    [button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
}

- (void)next:(id)sender
{
    SecondViewController *tempVC = [[SecondViewController alloc] init];
    
    [self presentViewController:tempVC animated:YES completion:nil];
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    if (_label.tag != 1)
    {
        _label.text = @"HAHAHAHA";
    }
    else
        _label.tag = 0;
    
}

#import "SecondViewController.h"
#import "GlobalDefine.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(20, 20, 50, 40);
    [button setTitle:@"返回" forState:UIControlStateNormal];
    
    [button setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];
    
    [self.view addSubview:button];
    
    //跳转
    [button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
}

- (void)next:(id)sender
{
    
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.rootViewController = [[ViewController alloc] init];
    self.window.backgroundColor = [UIColor grayColor];
    [self.window makeKeyAndVisible];
    
    return YES;
}

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (nonatomic, strong) UILabel *label;
@property (nonatomic, strong) UIButton *button;

@end

#import "ViewController.h"
#import "GlobalDefine.h"
#import "SecondViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    _label = [[UILabel alloc] initWithFrame:CGRectMake(SCREENWIDTH / 2 - 150, SCREENHEIGHT / 2 - 15, 300, 30)];
    _label.text = @"北京，你好！HELLO";
    _label.tag = 1;
    _label.textColor = [UIColor whiteColor];
    _label.font = [UIFont systemFontOfSize:22];
    _label.font = [UIFont boldSystemFontOfSize:23];
    _label.font = [UIFont italicSystemFontOfSize:25];
    _label.textAlignment = NSTextAlignmentCenter;
    [self.view addSubview:_label];
    
    _button = [UIButton buttonWithType:UIButtonTypeSystem];
    [_button setTitle:@"Next" forState:UIControlStateNormal];
    _button.frame = CGRectMake(SCREENWIDTH - 80, SCREENHEIGHT - 50, 60, 30);
    [_button setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];
    _button.titleLabel.font = [UIFont systemFontOfSize:20];//设置按钮字体大小
    [self.view addSubview:_button];
    
    //跳转
    [_button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
}

- (void)next:(id)sender
{
    SecondViewController *tempVC = [[SecondViewController alloc] init];
    [self presentViewController:tempVC animated:YES completion:nil];
}

- (void)viewWillAppear:(BOOL)animated
{
    if (_label.tag != 1)
    {
        _label.text = @"VIP";
    }
    else
    {
        _label.tag = 0;
    }
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

#import "SecondViewController.h"
#import "GlobalDefine.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(SCREENWIDTH / 2 - 130, SCREENHEIGHT / 2 - 20, 260, 40)];
    label.font = [UIFont systemFontOfSize:21];
    label.text = @"IOS is so easy! most of practice";
    label.textColor = [UIColor greenColor];
    [self.view addSubview:label];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(SCREENWIDTH - 100, SCREENHEIGHT - 50, 80, 30);
    [button setTitle:@"返回" forState:UIControlStateNormal];
    [button setTintColor:[UIColor whiteColor]];
    button.titleLabel.font = [UIFont systemFontOfSize:16];
    [self.view addSubview:button];
    
    //跳转
    [button addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];
    
}

- (void)back:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end


#ifndef GlobalDefine_h
#define GlobalDefine_h

#define SCREENWIDTH [UIScreen mainScreen].bounds.size.width
#define SCREENHEIGHT [UIScreen mainScreen].bounds.size.height

#endif /* GlobalDefine_h */