iOS 视图控制器的生命周期

#import "HPFSecondViewController.h"

@interface
HPFSecondViewController ()

@end

@implementation HPFSecondViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

//判断有没有可视化(nib或xib),有的话从xib中初始化

{

self = [super
initWithNibName:nibNameOrNil
bundle:nibBundleOrNil];

if (self) {

//不要在init中调用试图控制器的view

// Custom initialization

NSLog(@"init");

}

return
self;

}

-(void)loadView{

//加载视图控制器的view

//如果没有创建self.view的话
会和viewdidload循环几次
但当viewdidload中调用self.view的话
就会无线循环

[super loadView];

//相当于可视化中的创建界面,如用到可视化编程
不建议使用loadview方法,这里创建的视图回将可视化中的视图覆盖

NSLog(@"%s",__func__);

}

- (void)viewDidLoad

{

[super
viewDidLoad];

// Do any additional setup after loading the view.

self.view .backgroundColor = [UIColor
whiteColor];

// self.view.frame
是虚的不是最终的一个值,在viewdidload重作调整,看是否有导航条状态条等
是否透明等

//在viewdidload要对self.view的第一个子视图做判断
如果是滚动视图要自动作调整

}

-(void)viewWillAppear:(BOOL)animated{

NSLog(@"%s",__func__);

[super
viewWillAppear:YES];

}

-(void)viewDidAppear:(BOOL)animated{

NSLog(@"%s",__func__);

[super
viewDidDisappear:YES];

}

-(void)viewWillDisappear:(BOOL)animated{

NSLog(@"%s",__func__);

[super
viewDidDisappear:YES];

}

-(void)viewDidDisappear:(BOOL)animated{

[super
viewDidDisappear:YES];

}

- (void)didReceiveMemoryWarning

{

[super
didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}