#import <UIKit/UIKit.h> 
 
@interface LifeView : UIView 
 
@end 

#import "LifeView.h" 
 
@interface LifeView () 
{ 
  NSInteger count; 
} 
 
@end 
 
@implementation LifeView 
 
- (instancetype)initWithFrame:(CGRect)frame 
{ 
  self = [super initWithFrame:frame]; 
  if (self) 
  { 
    NSLog(@"<-- 1 %s , count = %@-->", __func__, @(count++)); 
  } 
  return self; 
} 
 
 
- (void)willMoveToSuperview:(nullable UIView *)newSuperview 
{ 
  NSLog(@"<-- 2 %s , count = %@-->", __func__, @(count++)); 
} 
 
- (void)didMoveToSuperview 
{ 
  NSLog(@"<-- 3 %s , count = %@-->", __func__, @(count++)); 
} 
 
- (void)willMoveToWindow:(nullable UIWindow *)newWindow 
{ 
  NSLog(@"<-- 4/7 %s , count = %@-->", __func__, @(count++)); 
} 
 
- (void)didMoveToWindow 
{ 
  NSLog(@"<-- 5/8 %s , count = %@-->", __func__, @(count++)); 
} 
 
- (void)layoutSubviews 
{ 
  NSLog(@"<-- 6 %s , count = %@-->", __func__, @(count++)); 
} 
 
- (void)removeFromSuperview 
{ 
  NSLog(@"<-- 9 %s , count = %@-->", __func__, @(count++)); 
} 
 
- (void)dealloc 
{ 
  NSLog(@"<-- 10 %s , count = %@-->", __func__, @(count++)); 
} 
 
@end 

- (void)viewDidLoad { 
  [super viewDidLoad]; 
  // Do any additional setup after loading the view. 
   
  self.title = @"life view"; 
   
  LifeView *lifeView = [[LifeView alloc] initWithFrame:CGRectMake(10.0, 80.0, 100.0, 100.0)]; 
  [self.view addSubview:lifeView]; 
  lifeView.tag = 1000; 
  lifeView.backgroundColor = [UIColor orangeColor]; 
} 

// 实例化时 
2017-06-16 00:37:10.694 DemoViewLife[3963:121184] <-- 1 -[LifeView initWithFrame:] , count = 0--> 
2017-06-16 00:37:10.695 DemoViewLife[3963:121184] <-- 2 -[LifeView willMoveToSuperview:] , count = 1--> 
2017-06-16 00:37:10.695 DemoViewLife[3963:121184] <-- 3 -[LifeView didMoveToSuperview] , count = 2--> 
2017-06-16 00:37:10.697 DemoViewLife[3963:121184] <-- 4/7 -[LifeView willMoveToWindow:] , count = 3--> 
2017-06-16 00:37:10.697 DemoViewLife[3963:121184] <-- 5/8 -[LifeView didMoveToWindow] , count = 4--> 
2017-06-16 00:37:10.701 DemoViewLife[3963:121184] <-- 6 -[LifeView layoutSubviews] , count = 5--> 

// 销毁时 
2017-06-16 00:37:25.514 DemoViewLife[3963:121184] <-- 4/7 -[LifeView willMoveToWindow:] , count = 6--> 
2017-06-16 00:37:25.514 DemoViewLife[3963:121184] <-- 5/8 -[LifeView didMoveToWindow] , count = 7--> 
2017-06-16 00:37:25.515 DemoViewLife[3963:121184] <-- 9 -[LifeView removeFromSuperview] , count = 8--> 
2017-06-16 00:37:25.516 DemoViewLife[3963:121184] <-- 9 -[LifeView removeFromSuperview] , count = 9--> 
2017-06-16 00:37:25.518 DemoViewLife[3963:121184] <-- 10 -[LifeView dealloc] , count = 10-->