iOS实现多控制器切换效果
本文实例为大家分享了iOS实现多控制器切换效果的具体代码,供大家参考,具体内容如下
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); // } }
目录
效果
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
赞 (0)