总结控制器View生命周期

一.系统方法.

view加载完毕
 
- (void)viewDidLoad
{
    [super viewDidLoad];
    
    NSLog(@"WKOneViewController-viewDidLoad");
}

  view即将显示到window上
 
- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    NSLog(@"WKOneViewController-viewWillAppear");
}


   view显示完毕(已经显示到窗口)
 
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    NSLog(@"WKOneViewController-viewDidAppear");
}

  view即将从window上移除(即将看不见)
 
- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    NSLog(@"WKOneViewController-viewWillDisappear");
}


  view从window上完全移除(完全看不见)

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

  view即将销毁的时候调用

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


view销毁完毕的时候调用

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

当接收到内存警告的时候
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];

}

二. 苹果对于内存警告官方图示

内存警告处理.png

三.对于系统控制器View的整个生命周期顺序图解.

生命周期方法.png