【代碼筆記】底下滾動，上面標題欄也會跟著變動

一，效果圖。

二，工程圖。

三，代碼。

RootViewController.h

#import <UIKit/UIKit.h>
#import "SVSegmentedControl.h"

@interface RootViewController : UIViewController
<UIScrollViewDelegate>
{
    UIScrollView *scrollView1;
    UIScrollView *scrollView2;
    UIPageControl *pag;
    NSMutableArray *dataArray;
    SVSegmentedControl *options;
}

@end

RootViewController.m

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    //初始化背景圖
    [self initBackGroundView];
}
#pragma -mark -functions
-(void)initBackGroundView
{
    //隱藏導航條
    self.navigationController.navigationBarHidden=YES;
    
    //底部的滾動條
    scrollView1=[[UIScrollView alloc]init];
    scrollView1.frame=CGRectMake(0, 40, 320, 400);
    scrollView1.backgroundColor=[UIColor grayColor];
    scrollView1.delegate=self;
    scrollView1.pagingEnabled=YES;
    scrollView1.contentSize=CGSizeMake(320*2, 376);
    [self.view addSubview:scrollView1];
    
    //第一頁的內容
    UIView *v1=[[UIView alloc]init];
    [v1 setFrame:CGRectMake(0, 0, 320, 376)];
    v1.backgroundColor=[UIColor redColor];
    [scrollView1 addSubview:v1];
    
    //第二頁的內容
    UIView *v2=[[UIView alloc]init];
    v2.frame=CGRectMake(320, 0, 320, 376);
    v2.backgroundColor=[UIColor blueColor];
    [scrollView1 addSubview:v2];
    
    //下麵指示頁的圓點
    pag=[[UIPageControl alloc]initWithFrame:CGRectMake(160, 400, 0, 0)];
    pag.numberOfPages=2;
    pag.currentPage=0;
    [self.view addSubview:pag];
    
    //上面的滑動圖標
    options = [[SVSegmentedControl alloc] initWithSectionTitles:[NSArray arrayWithObjects:@"購車應用",@"車主應用", nil]];
    [options addTarget:self action:@selector(actiBtClick:) forControlEvents:UIControlEventValueChanged];
    [options setBackgroundImage:[UIImage imageNamed:@"switchBg.png"]];
    options.center=CGPointMake(160, 50);
    options.crossFadeLabelsOnDrag=YES;
    options.selectedIndex=0;
    options.textColor=[UIColor blackColor];
    options.LKWidth=120;
    options.textShadowOffset=CGSizeMake(0, 0);
    options.textShadowColor=[UIColor clearColor];
    options.height=30;
    options.thumb.backgroundImage=[UIImage imageNamed:@"按鈕-2.png"];
    options.thumb.highlightedBackgroundImage=[UIImage imageNamed:@"按鈕-2.png"];
    options.thumb.textShadowColor=[UIColor clearColor];
    options.thumb.textShadowOffset=CGSizeMake(0, 0);
    [self.view addSubview:options];
    

}
#pragma -mark -doClickActions
- (void)actiBtClick:(SVSegmentedControl *)sender
{
    if(sender.selectedIndex==0)
    {
        [scrollView1 setContentOffset:CGPointMake(0, scrollView1.contentOffset.y) animated:YES];
        pag.currentPage=0;
    }
    else if(sender.selectedIndex==1)
    {
        [scrollView1 setContentOffset:CGPointMake(320, scrollView1.contentOffset.y) animated:YES];
        pag.currentPage=1;
    }
}
#pragma -mark -scrollViewDelegate
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    if(scrollView1.contentOffset.x==0)
    {
        pag.currentPage=0;
        [options moveThumbToIndex:0 animate:YES];
    }
    else if(scrollView1.contentOffset.x==320)
    {
        pag.currentPage=1;
        [options moveThumbToIndex:1 animate:YES];
    }
}

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