UIViewcontroller生命周期方法

UIViewcontroller生命周期方法

// 非storyBoard(xib或非xib)都走这个方法

- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {

    NSLog(@"%s", __FUNCTION__);

    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {

    

    }

    return self;

}

 

// 如果连接了串联图storyBoard 走这个方法

- (instancetype)initWithCoder:(NSCoder *)aDecoder {

     NSLog(@"%s", __FUNCTION__);

    if (self = [super initWithCoder:aDecoder]) {

        

    }

    return self;

}

 

// xib 加载 完成

- (void)awakeFromNib {

    [super awakeFromNib];

     NSLog(@"%s", __FUNCTION__);

}

 

// 加载视图(默认从nib)

- (void)loadView {

    NSLog(@"%s", __FUNCTION__);

    self.view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds];

    self.view.backgroundColor = [UIColor redColor];

    

    UIButton *btn = [[UIButton alloc]init];

    btn.backgroundColor = [UIColor systemBlueColor];

    btn.tag = 100;

    [self.view addSubview:btn];

}

 

//视图控制器中的视图加载完成，viewController自带的view加载完成

- (void)viewDidLoad {

    NSLog(@"%s", __FUNCTION__);

    [super viewDidLoad];

//     self.view = nil ;

 

}

- (void)updateViewConstraints{

    

    [super updateViewConstraints];

    

    UIButton * btn = (UIButton *)[self.view viewWithTag:100];

    

    btn.frame = CGRectMake(CGRectGetMidX(self.view.bounds) - 50, CGRectGetMidY(self.view.bounds) - 15, 100, 30);

    

    

    NSLog(@"%s",__FUNCTION__);

    

}

 

//视图将要出现

- (void)viewWillAppear:(BOOL)animated {

    NSLog(@"%s", __FUNCTION__);

    [super viewWillAppear:animated];

}

 

// view 即将布局其 Subviews

- (void)viewWillLayoutSubviews {

    NSLog(@"%s", __FUNCTION__);

    [super viewWillLayoutSubviews];

}

 

// view 已经布局其 Subviews

- (void)viewDidLayoutSubviews {

    NSLog(@"%s", __FUNCTION__);

    [super viewDidLayoutSubviews];

}

 

//视图已经出现

- (void)viewDidAppear:(BOOL)animated {

    NSLog(@"%s", __FUNCTION__);

    [super viewDidAppear:animated];

}

 

//视图将要消失

- (void)viewWillDisappear:(BOOL)animated {

    NSLog(@"%s", __FUNCTION__);

    [super viewWillDisappear:animated];

}

 

//视图已经消失

- (void)viewDidDisappear:(BOOL)animated {

    NSLog(@"%s", __FUNCTION__);

    [super viewDidDisappear:animated];

}

 

//出现内存警告  //模拟内存警告:点击模拟器->hardware-> Simulate Memory Warning

- (void)didReceiveMemoryWarning {

    NSLog(@"%s", __FUNCTION__);

    [super didReceiveMemoryWarning];

    

}

 

// 视图被销毁

- (void)dealloc {

    NSLog(@"%s", __FUNCTION__);

}

打印结果：