如何自己写一个容器来实现viewController之间的切换
</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];
}