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 = [superinitWithNibName: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

{

    [superviewDidLoad];

    // Do any additional setup after loading the view.

    self.view .backgroundColor = [UIColorwhiteColor];

    //    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__);

    [superviewWillAppear:YES];

}

-(void)viewDidAppear:(BOOL)animated{

    NSLog(@"%s",__func__);

    [superviewDidDisappear:YES];

}

-(void)viewWillDisappear:(BOOL)animated{

    NSLog(@"%s",__func__);

    [superviewDidDisappear:YES];

}

-(void)viewDidDisappear:(BOOL)animated{

    [superviewDidDisappear:YES];

}

- (void)didReceiveMemoryWarning

{

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}