iOS UI-(多)视图控制器的生命周期、加载方法和模态视图方法以及屌丝方法

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

@interface ViewController ()

@end

@implementation ViewController


// 视图控制器的生命周期
// 视图控制器的加载方法
// 模态视图方法

/*
// 视图控制器的加载方法
- (instancetype)init
{
    self = [super init];
    if (self) {
        // 属性、成员变量
        // 千万不要在这个地方初始化控件
    }
    return self;
}

- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    // 初始化控件（用nib文件创建的控件）
    // IB （.Xib文件） 没有stroyboard之前用的 这个文件叫nib文件
}

- (void)loadView
{
    //初始化试图用
}
*/


// 视图加载完成时调用，视图控制器当中（伪第一）调用的方法
- (void)viewDidLoad {
    [super viewDidLoad];
    NSLog(@"viewDidLoad");
    
    self.view.backgroundColor = [UIColor cyanColor];
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
    [btn setFrame:CGRectMake(130, 100, 100, 100)];
    [btn setTitle:@"next" forState:UIControlStateNormal];
    [btn setBackgroundColor:[UIColor orangeColor]];
    [btn addTarget:self action:@selector(modelMethod) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
    
}
#pragma mark - life Cycle
// 视图（每次）将要出现的时候调用
- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    NSLog(@"viewWillAppear");
    
}
// 视图（每次？）出现完成的时候调用
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    NSLog(@"veiwDidAppear");
    
}
// 视图（每次）将要消失的时候调用
- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    NSLog(@"viewWillDisappear");
    
}
// 视图消失完成之后时候调用
-(void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    NSLog(@"viewDidDisappear");
    
}

#pragma mark - Model View Method(模态视图方法)
- (void)modelMethod
{
    // 视图切换，切换到下一个视图
    SecondViewController *secondVC = [[SecondViewController alloc] init];
//    // 伪翻页
//    secondVC.modalTransitionStyle = UIModalTransitionStylePartialCurl;
//    // 模态方法跳入
//    [self presentViewController:secondVC animated:YES completion:nil];
    
    //屌丝方法
    [self.view addSubview:secondVC.view];
    [self addChildViewController:secondVC];
}

#pragma mark - other System Method
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

@end

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    NSLog(@"viewDidLoad");
    
    self.view.backgroundColor = [UIColor darkGrayColor];
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
    [btn setFrame:CGRectMake(130, 100, 100, 100)];
    [btn setTitle:@"back" forState:UIControlStateNormal];
    [btn setBackgroundColor:[UIColor whiteColor]];
    [btn addTarget:self action:@selector(backMethod) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
    
}
- (void)backMethod
{
    // 模态方法跳出
//    [self dismissViewControllerAnimated:YES completion:nil];
    
    //屌丝方法跳出
    [self.view removeFromSuperview];
    [self removeFromParentViewController];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}