iOS中分段控制器与UIScrollView结合使用

最新推荐文章于 2025-05-27 15:34:53 发布

dujianjunqwer

最新推荐文章于 2025-05-27 15:34:53 发布

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本文介绍如何使用iOS中的UISegmentedControl实现视图控制器之间的切换，并通过UIScrollView展示不同视图控制器的内容。文章详细展示了AppDelegate及ViewController的实现代码。

这里写图片描述

AppDelegate.h

//默认

AppDelegate.m

// AppDelegate.m


#import "AppDelegate.h"
#import "ViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    ViewController *vc=[[ViewController alloc]init];
    vc.title=@"分段控件练习";
    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:vc];
    self.window.rootViewController=nav;
    return YES;
}

ViewController.h

//默认

ViewController.m

#import "ViewController.h"
#import "FirstViewController.h"
#import "SecondViewController.h"
@interface ViewController ()<UIScrollViewDelegate>
@property (nonatomic, strong) UISegmentedControl *segmentedControl;
@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, strong) FirstViewController *firstVC;
@property (nonatomic, strong) SecondViewController *secondVC;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // 适应scrollView
    self.automaticallyAdjustsScrollViewInsets = NO;

    self.segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"你好", @"我的"]];
    self.navigationItem.titleView = self.segmentedControl;
    [self.segmentedControl addTarget:self action:@selector(segmentedControlAction:) forControlEvents:UIControlEventValueChanged];
    self.segmentedControl.selectedSegmentIndex = 0;

    // 创建scrollView
    self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 64, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height - 64)];
    [self.view addSubview:self.scrollView];
    // 设置scrollView的内容
    self.scrollView.contentSize = CGSizeMake([UIScreen mainScreen].bounds.size.width * 2, [UIScreen mainScreen].bounds.size.height - 64);
    self.scrollView.pagingEnabled = YES;
    self.scrollView.bounces = NO;

    // 创建控制器
    self.firstVC = [[FirstViewController alloc]init];
    self.secondVC = [[SecondViewController alloc]init];
    // 添加为self的子控制器
    [self addChildViewController:self.firstVC];
    [self addChildViewController:self.secondVC];
    self.firstVC.view.frame = CGRectMake(0, 0, self.scrollView.frame.size.width, CGRectGetHeight(self.scrollView.frame));
    self.secondVC.view.frame = CGRectMake([UIScreen mainScreen].bounds.size.width, 0, self.scrollView.frame.size.width, CGRectGetHeight(self.scrollView.frame));
    [self.scrollView addSubview:self.firstVC.view];
    [self.scrollView addSubview:self.secondVC.view];

    // 设置scrollView的代理
    self.scrollView.delegate = self;
}
- (void)segmentedControlAction:(UISegmentedControl *)sender
{
    [self.scrollView setContentOffset:CGPointMake(sender.selectedSegmentIndex * self.scrollView.frame.size.width, 0) animated:NO];
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    NSInteger n = scrollView.contentOffset.x / scrollView.frame.size.width;
    self.segmentedControl.selectedSegmentIndex = n;
}

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