UI 指派初始化方法 视图控制器 button响应方法

#import "MainViewController.h"

@interface MainViewController ()
// 延展 ：管理类私有的属性和方法
@end

@implementation MainViewController
// 指派初始化方法
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        // 数据的处理 在初始化方法中写
    }
    return self;
}
// 视图结束加载
// viewController自带的view加载完毕时候调用
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    // 一般的试图操作（添加视图 改变视图设置）都在这个方法中
    self.view.backgroundColor = [UIColor redColor];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(20, 120, 280, 30);
    [button setTitle:@"点 击" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    NSLog(@"%s", __FUNCTION__);

}


// button响应方法
- (void)buttonClicked:(UIButton *)button
{
    // 弹出新的视图控制器
    // 1.创建第二个试图控制器
    SecondViewController *secondVC = [[SecondViewController alloc] init];
    // 2.弹出
    // 参数1:需要弹出的viewController
    // 参数2:是否需要动画
    // 参数3:弹出执行完毕后 执行块（Block）里的代码
    [self presentViewController:secondVC animated:YES completion:^{
        //　code
    }];
    [secondVC release];
}
// viewController生命周期 方法
// 视图view已经出现
-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    NSLog(@"%s", __FUNCTION__);
}
-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    NSLog(@"%s", __FUNCTION__);
}
-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    NSLog(@"%s", __FUNCTION__);
}
-(void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    NSLog(@"%s", __FUNCTION__);
}
// 收到内存警告的时候 会调用这个方法
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    NSLog(@"%s", __FUNCTION__);
}

/*
#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