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</pre>视图控制器：ViewController<p></p><p><span style="font-size:18px"></span></p><p><span style="font-size:18px">在iOS程序开发中官方提供了四种切换ViewController的方法：</span></p><p><span style="font-size:18px"></span></p><p><span style="font-size:18px">01 模态视图切换</span></p><p><span style="font-size:18px">02 <span style="font-family:Menlo">UINavigationController</span></span></p><p><span style="font-size:18px"><span style="font-family:Menlo">03 </span><span style="font-family:Menlo">UITabBarController</span></span></p><p><span style="font-size:18px"><span style="font-family:Menlo">04 </span><span style="color:rgb(52,149,175); font-family:Menlo">addChildViewController</span></span></p><p><span style="font-size:18px"><span style="color:rgb(52,149,175); font-family:Menlo"> 在子视图控制中如何获取容器视图控制器呢？</span></span></p><p><span style="font-size:18px"><span style="color:rgb(52,149,175); font-family:Menlo"><span style="white-space:pre"> </span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: 'Heiti SC Light'; color: rgb(0, 143, 0);"><span style="font-family: 'Helvetica Neue';"><span style="white-space:pre"> </span>//</span>找到当前视图控制器所在的容器</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(52, 149, 175);"><span style="color: #000000"> </span>PSBMedicalViewController<span style="color: #000000"> * mvc = (</span><span style="font-family: 'Helvetica Neue'; color: rgb(4, 51, 255);">id</span><span style="color: #000000">)</span><span style="font-family: 'Helvetica Neue'; color: rgb(4, 51, 255);">self</span><span style="color: #000000">.</span>parentViewController<span style="color: #000000">;</span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; min-height: 21px;"> </p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(52, 149, 175);"><span style="color: #000000"> [mvc </span>popRightDrawer<span style="color: #000000">];</span></p><p><span style="font-size:18px; color:#cc0000"><span style="font-family:Menlo">第四种方式我们用来自定义容器时，切换ViewController。</span></span></p><p><span style="font-size:18px"><span style="color:rgb(52,149,175); font-family:Menlo"></span></span></p><p><span style="font-size:18px"><span style="font-family:Menlo">视图控制器有两类：1：显示的视图控制器 2：不显示的视图控制器，用来管理其他子视图控制器的视图控制器。称为：容器视图控制器。</span></span></p><p></p><p><span style="white-space:pre"> </span><span style="font-size:24px;color:#cc0000;">注意：自定义的容器视图控制器，是不能被释放的。为此，有多种方式让其不被释放，1：单例，2：交给NavigationBar中ViewControllers这个数组。</span></p><p></p><p></p><pre name="code" class="objc">#import "PSBRootViewController.h"/**自定义的容器控制器，管理其他的视图控制器，本身不显示*/
@interface AZMedicalViewController : PSBRootViewController//弹出右侧的抽屉
-(void)popRightDrawer;//收起右侧抽屉
-(void)hideRightDrawer;
@end
#import "AZMedicalViewController.h"
#import "AZFirstLayerModel.h"@interface AZMedicalViewController ()
{//判断当前抽屉是否显示BOOL _isDrawerShow;}@end@implementation AZMedicalViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization}return self;
}- (void)viewDidLoad
{[super viewDidLoad];//创建相关子视图[self createSubView];//在这里，添加被管理的子视图控制器[self createChildViewcontrollers];}- (void)didReceiveMemoryWarning
{[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}
//创建相关子视图
-(void)createSubView
{PSBBarButtonItem *backButton=[PSBViewFactory backButton];[backButton addTarget:self action:@selector(backButtonOnClick:) forControlEvents:UIControlEventTouchUpInside];[_nvgItem addSubview:backButton];
}-(void)backButtonOnClick:(PSBBarButtonItem *)item
{if (!_isDrawerShow){[self.navigationController popViewControllerAnimated:YES];}else{[self hideRightDrawer];}
}#pragma mark -- 容器视图控制器的相关方法
//添加子视图控制器
-(void)addChildViewControllers:(NSArray *)vcs
{if (vcs.count!=2) {return;}for (NSUInteger i=0; i<2; i++){PSBRootViewController *vc=vcs[i];//让出导航条CGRect frame=self.view.bounds;frame.origin.y += 64;frame.size.height -=64;if (i==0) {vc.view.frame=frame;}else{frame.size.width=frame.size.width/2;frame.origin.x=self.view.bounds.size.width;vc.view.frame=frame;}[self.view addSubview:vc.view];//但是需要注意：如果在ARC下，self.view 只添加了vc.view的话，那么arc会自动释放掉VC。//解决办法：//官方视图控制器，提供方法保留子视图控制器。//使当前视图控制器作为容器，子视图控制器不会被释放。其实内部实现也是很简单，就是一个数组，管理着这些子视图控制器，强引用。[self addChildViewController:vc];}}//弹出右侧的抽屉
-(void)popRightDrawer
{if (_isDrawerShow) {return;}[UIView beginAnimations:nil context:NULL];[UIView setAnimationDuration:0.25];//设置动画结束的效果PSBRootViewController *vc1=self.childViewControllers[0];CGRect frame=vc1.view.frame;frame.size.width=frame.size.width/2;vc1.view.frame=frame;PSBRootViewController *vc2=self.childViewControllers[1];frame=vc2.view.frame;frame.origin.x=vc1.view.frame.size.width;vc2.view.frame=frame;[UIView commitAnimations];_isDrawerShow=YES;
}//收起右侧抽屉
-(void)hideRightDrawer
{if (!_isDrawerShow) {return;}[UIView beginAnimations:nil context:NULL];[UIView setAnimationDuration:0.25];//设置动画的效果CGRect frame=self.view.bounds;frame.origin.y +=64;frame.size.height -=64;PSBRootViewController *vc1=self.childViewControllers[0];vc1.view.frame=frame;PSBRootViewController *vc2=self.childViewControllers[1];frame.origin.x=vc1.view.frame.size.width;frame.size.width=self.view.bounds.size.width/2;vc2.view.frame=frame;[UIView commitAnimations];_isDrawerShow=NO;}#pragma mark -- 子视图控制器
//创建子视图控制器
-(void)createChildViewcontrollers
{NSArray *tempArray=@[@"AZFirstViewController",@"AZSecondViewController"];id obj1,obj2;for (NSUInteger i=0; i<tempArray.count; i++){Class cls=NSClassFromString(tempArray[i]);id obj=[[cls alloc] init];if (i) {obj2=obj;}else{obj1=obj;}}//添加到当前容器[self addChildViewControllers:@[obj1,obj2]];
}@end
//选中了一个cell
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{//找到当前视图控制器所在的容器PSBMedicalViewController * mvc = (id)self.parentViewController;[mvc popRightDrawer];
}
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