ios - UIViewController 生命周期

Question

结果:

2014-05-12 11:17:24.891 viewController[2206:60b] init

2014-05-12 11:17:24.910 viewController[2206:60b] loadView

2014-05-12 11:17:24.911 viewController[2206:60b] viewDidLoad!

2014-05-12 11:17:24.912 viewController[2206:60b] viewWillAppear

2014-05-12 11:17:24.916 viewController[2206:60b] dealloc

2014-05-12 11:17:24.982 viewController[2206:60b] viewDidAppear

为什么在viewWillAppear方法和viewDidAppear方法之间dealloc方法？

 - (id)init
{
    if (self = [super init]) {

        NSLog(@"init");
    }
    return self;
}

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

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

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

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

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

Answer 1

来自您的评论:

The method dealloc log self address was changed! – user3349116

您正在查看来自 View Controller 的不同实例的日志。当您尝试跟踪此类事件时，请在您的日志中包含 self。并确保在执行此操作时不要破坏 View Controller (您的 loadView 实现可能意味着您没有任何内容可显示在屏幕上)。

无论如何， View Controller 生命周期都有详细的文档记录，而且在大多数情况下非常明显。