iOS UI-视图控制器的生命周期、加载方法和模态视图方法

  1 #import "ViewController.h"
  2 #import "SecondViewController.h"
  3 
  4 @interface ViewController ()
  5 
  6 @end
  7 
  8 @implementation ViewController
  9 
 10 
 11 // 视图控制器的生命周期
 12 // 视图控制器的加载方法
 13 // 模态视图方法
 14 
 15 /*
 16 // 视图控制器的加载方法
 17 - (instancetype)init
 18 {
 19     self = [super init];
 20     if (self) {
 21         // 属性、成员变量
 22         // 千万不要在这个地方初始化控件
 23     }
 24     return self;
 25 }
 26 
 27 - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
 28 {
 29     // 初始化控件（用nib文件创建的控件）
 30     // IB （.Xib文件） 没有stroyboard之前用的 这个文件叫nib文件
 31 }
 32 
 33 - (void)loadView
 34 {
 35     //初始化试图用
 36 }
 37 */
 38 
 39 
 40 // 视图加载完成时调用，视图控制器当中（伪第一）调用的方法
 41 - (void)viewDidLoad {
 42     [super viewDidLoad];
 43     NSLog(@"viewDidLoad");
 44     
 45     self.view.backgroundColor = [UIColor cyanColor];
 46     
 47     UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
 48     [btn setFrame:CGRectMake(130, 100, 100, 100)];
 49     [btn setTitle:@"next" forState:UIControlStateNormal];
 50     [btn setBackgroundColor:[UIColor orangeColor]];
 51     [btn addTarget:self action:@selector(modelMethod) forControlEvents:UIControlEventTouchUpInside];
 52     [self.view addSubview:btn];
 53     
 54 }
 55 #pragma mark - life Cycle
 56 // 视图（每次）将要出现的时候调用
 57 - (void)viewWillAppear:(BOOL)animated
 58 {
 59     [super viewWillAppear:animated];
 60     NSLog(@"viewWillAppear");
 61     
 62 }
 63 // 视图（每次？）出现完成的时候调用
 64 - (void)viewDidAppear:(BOOL)animated
 65 {
 66     [super viewDidAppear:animated];
 67     NSLog(@"veiwDidAppear");
 68     
 69 }
 70 // 视图（每次）将要消失的时候调用
 71 - (void)viewWillDisappear:(BOOL)animated
 72 {
 73     [super viewWillDisappear:animated];
 74     NSLog(@"viewWillDisappear");
 75     
 76 }
 77 // 视图消失完成之后时候调用
 78 -(void)viewDidDisappear:(BOOL)animated
 79 {
 80     [super viewDidDisappear:animated];
 81     NSLog(@"viewDidDisappear");
 82     
 83 }
 84 
 85 #pragma mark - Model View Method(模态视图方法)
 86 - (void)modelMethod
 87 {
 88     // 视图切换，切换到下一个视图
 89     SecondViewController *secondVC = [[SecondViewController alloc] init];
 90     secondVC.modalTransitionStyle = UIModalTransitionStylePartialCurl;
 91 
 92     // 进入一个视图
 93     [self presentViewController:secondVC animated:YES completion:nil];
 94     
 95     
 96 }
 97 
 98 #pragma mark - other System Method
 99 - (void)didReceiveMemoryWarning {
100     [super didReceiveMemoryWarning];
101 }
102 
103 @end

 1 #import "SecondViewController.h"
 2 
 3 @interface SecondViewController ()
 4 
 5 @end
 6 
 7 @implementation SecondViewController
 8 
 9 - (void)viewDidLoad {
10     [super viewDidLoad];
11     NSLog(@"viewDidLoad");
12     
13     self.view.backgroundColor = [UIColor darkGrayColor];
14     
15     UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
16     [btn setFrame:CGRectMake(130, 100, 100, 100)];
17     [btn setTitle:@"back" forState:UIControlStateNormal];
18     [btn setBackgroundColor:[UIColor whiteColor]];
19     [btn addTarget:self action:@selector(backMethod) forControlEvents:UIControlEventTouchUpInside];
20     [self.view addSubview:btn];
21     
22 }
23 - (void)backMethod
24 {
25     // 返回上一个视图
26     [self dismissViewControllerAnimated:YES completion:nil];
27 }
28 
29 - (void)didReceiveMemoryWarning {
30     [super didReceiveMemoryWarning];
31 }