UIViewController

模式对话窗体跳转

1、

//模式对话窗体跳转

- (void)presentViewController:(UIViewController *)viewControllerToPresent  animated:(BOOL)flag  completion:(void (^)(void))completion;

如：

SubViewController *svc = [[SubViewController alloc]init];

    svc.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;

    [self presentViewController:svc animated:YES completion:^{

    }];

svc.modalTransitionStyle 指切换模式

2、

//关闭模式对话窗体

- (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion;

如：

[self dismissViewControllerAnimated:YES completion:^{

    }];

 

生命周期

1、loadView

2、viewDidLoad

//3、viewDidUnload

//4、didReceiveMemoryWarning

5、viewWillAppear

6、viewDidAppear

7、viewWillDisappear

8、viewDidDisappear

一般生命周期是：loadView  ->  viewDidLoad  ->  viewWillAppear  ->  viewDidAppear  ->viewWillDisappear  ->viewDidDisappear