iOS - 多控制器切换(带滑动动画)

主控制器 ,管理控制器 .h文件

//宏#define kScreenWidth  [UIScreen mainScreen].bounds.size.width#define kScreenHeight  [UIScreen mainScreen].bounds.size.height#import "MYMainViewController.h"#import "MYFirstViewController.h"#import "MYSecondViewController.h"#import "MYThirdViewController.h"@interface MYMainViewController ()<UIScrollViewDelegate>//控制器名@property (nonatomic, strong) NSArray *VcNames;//选择栏@property(nonatomic, strong) UIView *clickBar;//底部容器scrollView@property (strong, nonatomic) UIScrollView *containerScrollerView;@end

. m 文件
底部scrollView , 用于滑动

@implementation MYMainViewController- (UIScrollView *)containerScrollerView{    if (!_containerScrollerView) {        _containerScrollerView = [[UIScrollView alloc]init];        _containerScrollerView.pagingEnabled = YES;        _containerScrollerView.showsVerticalScrollIndicator = NO;        _containerScrollerView.showsHorizontalScrollIndicator = NO;        _containerScrollerView.contentSize = CGSizeMake(kScreenWidth *self.VcNames.count,kScreenHeight);        _containerScrollerView.backgroundColor = [UIColor whiteColor];        _containerScrollerView.delegate = self;    }    return _containerScrollerView;}

初始化顶部选择栏

//三个子控制器- (NSArray *)VcNames{    if (!_VcNames) {        _VcNames = @[@"控制器一",@"控制器二",@"控制器三"];    }    return _VcNames;}//点击选择栏- (UIView *)clickBar{    if (!_clickBar) {        _clickBar = [[UIView alloc]init];        _clickBar.backgroundColor = [UIColor lightGrayColor];        CGFloat width = kScreenWidth / 3;        CGFloat height = 44;        //初始化按钮        for (NSInteger index = 0; index < 3; index++) {            UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];            [button setTitle:self.VcNames[index] forState:UIControlStateNormal];            [button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];            button.frame = (CGRect){width *index,0,width,height};            [button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];            //绑定tag值            button.tag = index;            [_clickBar addSubview:button];        }    }    return _clickBar;}

viewDidLoad

- (void)viewDidLoad {    [super viewDidLoad];    self.edgesForExtendedLayout = 0;    //初始化选择栏    [self initClickBar];    //初始化底部scrollView容器    [self initScrollViewContainer];    //初始化子控制器    [self addChildControllers];}

添加子控制器 , 初始化UI

//按钮选择栏- (void)initClickBar{    [self.view addSubview:self.clickBar];    self.clickBar.frame = (CGRect){0,0,[UIScreen mainScreen].bounds.size.width,44};}//初始化滑动容器- (void)initScrollViewContainer{    [self.view addSubview:self.containerScrollerView];    self.containerScrollerView.frame = CGRectMake(0,44,kScreenWidth, kScreenHeight );}//添加子控制器- (void)addChildControllers{    //为了方便直观 , 在此处设置背景色  (实际开发中,不能在这里设置 , 原因是这里只要调用到了控制器的view属性 , 该控制器将会执行viewDidLoad方法 , 相当于直接一开始就将三个控制器的所有UI和网络请求全加载完了 , 负荷会相当重)    MYFirstViewController *firstVc = [[MYFirstViewController alloc]init];    firstVc.view.backgroundColor = [UIColor redColor];    [self addChildViewController:firstVc];    MYSecondViewController *secondVc = [[MYSecondViewController alloc]init];    secondVc.view.backgroundColor = [UIColor blueColor];    [self addChildViewController:secondVc];    MYThirdViewController *thirdVc = [[MYThirdViewController alloc]init];    thirdVc.view.backgroundColor = [UIColor yellowColor];    [self addChildViewController:thirdVc];    //默认展示第一个子控制器    [self scrollViewDidEndDecelerating:self.containerScrollerView];}

按钮点击事件实现 , 代理方法实现

//选择栏按钮点击事件- (void)buttonClick:(UIButton *)button{    [self.containerScrollerView setContentOffset:CGPointMake(button.tag *kScreenWidth, 0) animated:YES];}//滑动减速时调用- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{    //获取contentOffset    CGPoint currentOffset = scrollView.contentOffset;    NSInteger page = currentOffset.x / kScreenWidth;    //取出对应控制器    UIViewController *viewController = self.childViewControllers[page];    //添加到scrollView容器    //    if (![viewController isViewLoaded]) {    [self.containerScrollerView addSubview:viewController.view];    viewController.view.frame = CGRectMake(page *kScreenWidth, 0,kScreenWidth, kScreenHeight);    //    }}

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目录

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效果