iOS-VC生命周期

在一个vc中写入以下函数：

- (void)loadView{
    [super loadView];
    NSLog(@"loadView");
}

- (void)viewDidLoad {
    [super viewDidLoad];
    NSLog(@"viewDidLoad");
    self.view.backgroundColor = UIColorFromHex(0x009966, 1.0);
}

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    NSLog(@"viewWillAppear");
}

- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    NSLog(@"viewDidAppear");
}

- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    NSLog(@"viewWillDisappear");
}

- (void)viewDidDisappear:(BOOL)animated{
    [super viewDidDisappear:animated];
    NSLog(@"viewDidDisappear");
}

- (void)dealloc{
    NSLog(@"dealloc");
}

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

进入vc的输出如下：

  loadView

  viewDidLoad

  viewWillAppear

  viewDidAppear

退出vc的输出如下：

  viewWillDisappear

  viewDidDisappear

  dealloc