IOS5中的新增加对UIViewController的子控制器操作方法

「爱情、让人受尽委屈。」 2021-11-01 04:31 250阅读 0赞

IOS5之后，UIViewController增加了一些操作子控制器的方法,以下列举几个：

添加子控制器：

- (void)addChildViewController:(UIViewController *)childController NS_AVAILABLE_IOS(5_0);

移除子控制器：

- (void) removeFromParentViewController NS_AVAILABLE_IOS(5_0);

改变控制器从fromViewController到toViewController，过程几秒，动画选项，自定义动画方法，完成方法

- (void)transitionFromViewController:(UIViewController *)fromViewController toViewController:(UIViewController *)toViewController duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion NS_AVAILABLE_IOS(5_0);

下面是一个通过childViewController来改变视图的demo:

主视图控制器 :laomaoViewController.h

#import <UIKit/UIKit.h>
    #import "laomaoFirstViewController.h"
    #import "laomaoSecondViewController.h"
    
    @interface laomaoViewController : UIViewController{
        laomaoFirstViewController * _firstViewController;
        laomaoSecondViewController * _secondViewController;
        UIViewController * _currentViewController;
    }
    @property (retain, nonatomic) IBOutlet UIView *contentView;
    
    @end

主视图控制器实现方法：laomaoViewController.m

#import "laomaoViewController.h"
    
    
    @interface laomaoViewController ()
    
    @end
    
    @implementation laomaoViewController
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
    	_firstViewController = [[laomaoFirstViewController alloc]init];
        [self addChildViewController:_firstViewController];
        _secondViewController = [[laomaoSecondViewController alloc]init];
        [self addChildViewController:_secondViewController];
        //[self.view addSubview:_firstViewController.view];
        [self.contentView addSubview:_firstViewController.view];
        _currentViewController = _firstViewController;
        UIButton * button = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 140, 40)];
        button.backgroundColor = [UIColor grayColor];
        [button addTarget:self action:@selector(changeView) forControlEvents:UIControlEventTouchUpInside];
        [button setTitle:@"clickChangeView" forState:UIControlStateNormal];
        [self.view addSubview:button];
    }
    
    - (void)changeView {
        [self transitionFromViewController:_currentViewController == _firstViewController?_firstViewController:_secondViewController toViewController:_currentViewController == _firstViewController?_secondViewController:_firstViewController duration:2 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{
        } completion:^(BOOL finished){
            _currentViewController = _currentViewController == _firstViewController?_secondViewController:_firstViewController;
        }];
    }
    
    - (void)viewDidUnload {
        NSLog(@"ViewController----ViewDidUnload");
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        NSLog(@"ViewController----didReceiveMemoryWarning");
        // Dispose of any resources that can be recreated.
    }
    
    - (void)dealloc {
        [_contentView release];
        [super dealloc];
    }
    @end

第一个子视图控制器：laomaoFirstViewController.h

#import <UIKit/UIKit.h>
    
    @interface laomaoFirstViewController : UIViewController
    
    @end

第一个子视图控制器实现文件：laomaoFirstViewController.m

#import "laomaoFirstViewController.h"
    
    @interface laomaoFirstViewController ()
    
    @end
    
    @implementation laomaoFirstViewController
    
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            self.view.frame = CGRectMake(40, 0, 240, 240);
        }
        return self;
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
    	self.view.backgroundColor = [UIColor blueColor];
    }
    
    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        NSLog(@"FirstViewController----didReceiveMemoryWarning");
    }
    
    @end

第二个子视图控制器：laomaoSecondViewController.h

#import <UIKit/UIKit.h>
    
    @interface laomaoSecondViewController : UIViewController
    
    @end

第二个子视图控制器实现文件：laomaoSecondViewController.m

#import "laomaoSecondViewController.h"
    
    @interface laomaoSecondViewController ()
    
    @end
    
    @implementation laomaoSecondViewController
    
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            self.view.frame = CGRectMake(40, 0, 240, 240);
        }
        return self;
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
    	self.view.backgroundColor = [UIColor redColor];
    }
    
    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        NSLog(@"SecondViewController----didReceiveMemoryWarning");
    }
    
    @end