Viewcontroller的生命周期

这已然是一个老生常谈的话题，这里再重复记录一下:

Viewcontroller生命周期

- (instancetype)init{
 self= [super init];
 if(self) {
 debugMethod();
 }
 return self;
 }

- (void)loadView{
 [super loadView];
 debugMethod();
 }

- (void)viewDidLoad {
 [super viewDidLoad];
 self.view.backgroundColor= [UIColorwhiteColor];
 debugMethod();
 }

- (void)viewWillAppear:(BOOL)animated{
 [super viewWillAppear:animated];
 debugMethod();
 }

- (void)viewDidAppear:(BOOL)animated{
 [super viewDidAppear:animated];
 debugMethod();
 }

- (void)viewWillDisappear:(BOOL)animated{
 [super viewWillDisappear:animated];
 debugMethod();
 }

- (void)viewDidDisappear:(BOOL)animated{
 [super viewDidDisappear:animated];
 debugMethod();
 }

打印：

-[NextViewController init]

-[NextViewController loadView]

-[NextViewController viewDidLoad]

-[NextViewController viewWillAppear:]

-[NextViewController viewDidAppear:]

-[NextViewController viewWillDisappear:]

-[NextViewController viewDidDisappear:]