iOS开发--ChildViewController实现订单页的切换

　　先不说废话, 上效果图, 代码量也不大, 也不上传github骗星星了, 你们复制粘贴下代码, 就可以轻而易举的弄出一个小demo.

　　

　　这个代码的实现并不复杂, 甚至于说非常简单, 就是逻辑有点小绕, 下面将用代码详细讲解下.

　　childViewController方便在一个vc上面呈现出这种多种vc的效果, 相信好处百度上面说的多了去了, 这里只说实现.

　　首先, 需要新建一个父vc和五个子vc, 这里就不多说了, 先给大家看看进入父vc后的上面的btn控件封装, 以及方法回调.

　　IndentButtonView.h中代码

 #import "RootClassView.h"

 typedef void(^buttonBlock)(NSInteger);

 @interface IndentButtonView : RootClassView

 @property(nonatomic, copy)buttonBlock block;

 @end

　　这里声明了一个具有整形参数的block闭包属性, 用于捕获button的tag值来作为参数回调.

　　IndentButtonView.m中代码, 有我自己定义的宏和基类, 你们按照你们自己的习惯来写就好.

 #import "IndentButtonView.h"
 #import "ALLHeaderFile.pch"
 @implementation IndentButtonView

 - (instancetype)initWithFrame:(CGRect)frame{
     self = [super initWithFrame:frame];
     if (self) {
         [self createButton];
     }
     return self;
 }

 - (void)createButton{
     NSArray *nameArray = @[@"全部", @"待付款", @"待收货", @"待评价", @"退换货"];
     for (NSInteger i = ; i < ; i++) {
         UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
         button.frame = CGRectMake( /  * i, ,  / , self.H);
         [button setTitle:nameArray[i] forState:UIControlStateNormal];
         button.tag =  + i;
         [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
         button.backgroundColor = [UIColor grayColor];
         button.titleLabel.textColor = [UIColor redColor];
         button.titleLabel.font = [UIFont systemFontOfSize:];
         [self addSubview:button];
     }
 }

 - (void)buttonAction:(UIButton *)button{
     NSLog(@"第%ld个按钮被点击了", button.tag -);
     _block(button.tag - );
 }
 @end

　　当点击button的时候, 触发闭包传值回调. 通过button的tag值判断, 在闭包实现的地方也会有不同的结果. 这样一个button按钮条的封装就完成了.

　　然后是外部的一个自定义cell, 我选择了用四个imageView作为订单四个状态的按钮. 这个自定义cell同样声明了一个闭包属性, 作为以后的回调, 传递的也是imageView的tag值作为参数.

　　.h

#import "RootClassTableViewCell.h"
#import "RootClassImageView.h"
typedef void(^indentBlock)(NSInteger);
@interface IndentTableViewCell : RootClassTableViewCell
@property(nonatomic, copy)indentBlock block;
@end

　　.m中代码

　　

 #import "IndentTableViewCell.h"
 #import "XCLHeader.h"
 #import "RootClassLabel.h"
 @implementation IndentTableViewCell

 - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
 {
     self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
     if (self) {
         [self createCell];
     }
     return self;
 }

 - (void)createCell
 {
     //订单Label
     RootClassLabel *indentLabel = [[RootClassLabel alloc]initWithFrame:CGRectMake(, , , )];
     indentLabel.text = @"订单";
     indentLabel.font = [UIFont systemFontOfSize:];
     [self.contentView addSubview:indentLabel];

     //查看全部订单
     RootClassLabel *checkIndentLabel = [[RootClassLabel alloc]initWithFrame:CGRectMake(SCREEN_WIDTH - ( +  +  + ) / ,  / ,  / ,  / )];
     checkIndentLabel.text = @"查看全部订单";
     checkIndentLabel.font = [UIFont systemFontOfSize:];
     [self.contentView addSubview:checkIndentLabel];

     RootClassImageView *imageView = [[RootClassImageView alloc]initWithFrame:CGRectMake(checkIndentLabel.X + checkIndentLabel.W + , checkIndentLabel.Y, , )];
     [self.contentView addSubview:imageView];

     /**循环实例化imageView对象
      *
      *待付款
      *
      *待收货
      *
      *待评价
      *
      *退换货
      *
      */

     for (NSInteger i = ; i < ; i++) {
         RootClassImageView *imageView = [[RootClassImageView alloc]initWithFrame:CGRectMake( +  /  * i,  / ,  / ,  / )];
         //imageView增加tag值
         imageView.tag =  + i;

         //打开imageView交互
         imageView.userInteractionEnabled = YES;

         //为imageView添加轻拍手势
         UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];
         [imageView addGestureRecognizer:tap];
         imageView.t;
         [self.contentView addSubview:imageView];
     }
 }

 - (void)tapAction:(UITapGestureRecognizer *)tap
 {
     _block(tap.view.tag - );
 }

 - (void)layoutSubviews
 {
     [super layoutSubviews];
 }

　　自定义cell在重用池协议中代码, 对闭包进行了实现, 同时传递值给要跳转的vc.

         //订单
         static NSString *indentifier = @"indent";
         IndentTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:indentifier];
         if (!cell) {
             cell = [[IndentTableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:indentifier];
             cell.selectionStyle = ;
         }
         cell.block = ^(NSInteger index){
             //index就是通过block传递过来imageView的tag值.
             MyIndentViewController *myIndentViewController = [MyIndentViewController new];
             //当点击imageView后, 将图片的tag值传递给vc, vc通过这个值来布局, 以实现点击不同的imageView, 使页面中呈现不同的子视图.
             myIndentViewController.index = index + ;
             [self.navigationController pushViewController: myIndentViewController animated:];
         };
         return cell;

　　可能上面传tag值让大家很迷茫, 现在把最重要的实现部分的VC代码拿出来, 大家就好懂了.

　　.h

　　

 #import "ViewController.h"

 @interface MyIndentViewController : ViewController

 @property(nonatomic, assign)NSInteger index;

 @end

　　.m

 //我的订单页

 #import "MyIndentViewController.h"
 #import "ALLHeaderFile.pch"
 @interface MyIndentViewController ()
 @property(nonatomic, strong)IndentButtonView *buttonView;
 //子视图
 @property(nonatomic, strong)AllIndentViewController *allIndentViewController;
 @property(nonatomic, strong)ObligationViewController *obligationViewController;
 @property(nonatomic, strong)WaitingReceiveViewController *waitingReceiveViewController;
 @property(nonatomic, strong)WaitingEvaluateViewController *waitingEvaluateViewController;
 @property(nonatomic, strong)ExchangeViewController *exchangeViewController;

 //当前视图
 @property(nonatomic, strong)RootClassViewController *currentViewController;

 //视图控制器数组
 @property(nonatomic, strong)NSMutableArray *viewControllerArray;

 @end

 @implementation MyIndentViewController

 - (void)loadView {
     [super loadView];
     //实例化buttonView
     _buttonView = [[IndentButtonView alloc]initWithFrame:CGRectMake(, , SCREEN_WIDTH, )];
     [self.view addSubview:_buttonView];

     //添加视图方法
     [self addViewController];

 }

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view.

     //实现buttonView的block
     __weak typeof (self) WeakSelf = self;
     _buttonView.block = ^(NSInteger sign){
         [WeakSelf changeChildViewController:sign];
     };
 }

 - (void)changeChildViewController:(NSInteger)sign {
     //通过block传递过来的tag值判断切换视图
     //如果点击的button在当前页, 则废弃点击操作
     if ((_currentViewController == _allIndentViewController && sign == ) ||
         (_currentViewController == _obligationViewController && sign == ) ||
         (_currentViewController == _waitingReceiveViewController && sign == ) ||
         (_currentViewController == _waitingEvaluateViewController && sign == ) ||
         (_currentViewController == _exchangeViewController && sign == )
         ) {
         return;
     }
     else{
         [self replaceOldViewCroller:_currentViewController newViewController:_viewControllerArray[sign]];
     }
 }

 - (void)addViewController {
     //视图控制器数组
     _viewControllerArray = [NSMutableArray array];

     //设置子视图的尺寸
     CGRect rect = CGRectMake(, , SCREEN_HEIGHT, SCREEN_HEIGHT - );

     //实例化子视图的vc
     _allIndentViewController = [AllIndentViewController new];
     _obligationViewController = [ObligationViewController new];
     _waitingReceiveViewController = [WaitingReceiveViewController new];
     _waitingEvaluateViewController = [WaitingEvaluateViewController new];
     _exchangeViewController = [ExchangeViewController new];

     //将子视图的vc添加到一个可变数组中, 方便处理
     [_viewControllerArray addObject:_allIndentViewController];
     [_viewControllerArray addObject:_obligationViewController];
     [_viewControllerArray addObject:_waitingReceiveViewController];
     [_viewControllerArray addObject:_waitingEvaluateViewController];
     [_viewControllerArray addObject:_exchangeViewController];

     //偷懒
     for (NSInteger i = ; i < ; i++) {
         [_viewControllerArray[i] view].frame = rect;
     }

     //这块是实现能够在外面点击不同的imageView进入不同页面的关键, 通过属性传值确定视图的内部布局
     [self.view addSubview:[_viewControllerArray[_index] view]];

     //将当前子视图设置为传值确定的子视图
     _currentViewController = _viewControllerArray[_index];

     //将子视图添加到父视图上
     [self addChildViewController:_viewControllerArray[_index]];

 }

 #pragma mark 切换子视图方法

 - (void)replaceOldViewCroller:(RootClassViewController *)oldViewController newViewController:(RootClassViewController *)newViewController{

     //将新的子视图先添加到父视图上
     [self addChildViewController:newViewController];

     //这个方法是负责对子视图进行切换的, 有几个参数, 前两个参数是切换前子视图和切换后子视图, 这个方法有个条件, 就是一定要两个视图都是当前父视图的子视图才可以切换, 所以在上面才会先添加子视图, 后面的参数都应该很熟悉了, duration延时, options选项, 可以将动画的枚举类型给他, animations更不用说了, 动画效果, 闭包的bool参数finish代表的是切换是否成功
     [self transitionFromViewController:oldViewController toViewController:newViewController duration:. options:UIViewAnimationOptionTransitionCrossDissolve  animations:nil completion:^(BOOL finished) {
         if (finished) {
             //切换后将老视图移除, 新的视图设置为当前视图
             [oldViewController removeFromParentViewController];
             _currentViewController = newViewController;

         }else{

             _currentViewController = oldViewController;

         }
     }];
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 /*
 #pragma mark - Navigation

 // In a storyboard-based application, you will often want to do a little preparation before navigation
 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
     // Get the new view controller using [segue destinationViewController].
     // Pass the selected object to the new view controller.
 }
 */

 @end

　　通过这么简单的几步, 就实现了如上界面.