• iOS控制器生命周期

// 1棋傍、初始化
- (instancetype)init {
    self = [super init];
    if (self) {
        NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
    }
    return self;
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
    }
    return self;
}

// 2、View加載
- (void)loadView {
    [super loadView];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 3难审、View加載完成
- (void)viewDidLoad {
    [super viewDidLoad];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 4瘫拣、View即將顯示
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 5、View顯示完成
- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 6告喊、View即將消失
- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 7麸拄、View消失完成
- (void)viewDidDisappear:(BOOL)animated {
    [super viewDidDisappear:animated];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 8、當內(nèi)存過低時黔姜，需要釋放一些不需要使用的視圖時拢切，即將釋放時調(diào)用（已過期）
- (void)viewWillUnload {
    [super viewWillUnload];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 9、當內(nèi)存過低秆吵，釋放一些不需要的視圖時調(diào)用（已過期）
- (void)viewDidUnload {
    [super viewDidUnload];
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

// 控制器銷毀時調(diào)用
- (void)dealloc {
    NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);
}

• Apple Watch生命周期

// 1淮椰、init

// 2、表盤加載的時候調(diào)用（類似awakeFromNib）
- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];

    // Configure interface objects here.
    NSLog(@"%s, line= %d", __FUNCTION__, __LINE__);
}

// 3帮毁、視圖即將展示的時候調(diào)用（類似viewWillAppear）
- (void)willActivate {
    // This method is called when watch view controller is about to be visible to user
    [super willActivate];
    NSLog(@"%s, line= %d", __FUNCTION__, __LINE__);
}

// 3实苞、跳頁的時候調(diào)用（類似viewDidDisAppear）
- (void)didDeactivate {
    // This method is called when watch view controller is no longer visible
    [super didDeactivate];
    NSLog(@"%s, line= %d", __FUNCTION__, __LINE__);
}