swift--添加新手引导页

swift和oc逻辑上都是一样的，只是写法不一样，可以使用一个view，也可以使用一个viewController，两种都可以的，使用view注意初始化的时候给他一个frame，vc的话，直接在本控制器里面写控制即可！

1，创建一个vc，然后在里面初始化一个scrollview，升值contentsize为3 * 页面宽度，然后添加图片，最后可以实现相应的代理方法，判断最后是点击进入主页，还是滑动

具体代码如下：

import UIKit

class hDisplayViewController: UIViewController,UIScrollViewDelegate {
    
    //页面数量
    var numOfPages = 3
    
    override func viewDidLoad() {
        super.viewDidLoad()
        let frame = self.view.bounds
        //scrollView的初始化
        let scrollView = UIScrollView()
        scrollView.frame = self.view.bounds
        scrollView.delegate = self
        //为了能让内容横向滚动，设置横向内容宽度为3个页面的宽度总和
        scrollView.contentSize = CGSize(frame.size.width * CGFloat(numOfPages),
                                        height:frame.size.height)
        print("(frame.size.width*CGFloat(numOfPages)),(frame.size.height)")
        scrollView.isPagingEnabled = true
        scrollView.showsHorizontalScrollIndicator = false
        scrollView.showsVerticalScrollIndicator = false
        scrollView.scrollsToTop = false
        for i in 0..<numOfPages{
            let imgfile = "bg(Int(i+1)).png"
            print(imgfile)
            let image = UIImage(named:"(imgfile)")
            let imgView = UIImageView(image: image)
            imgView.frame = CGRect(x:frame.size.width*CGFloat(i), y:CGFloat(0),
                                   frame.size.width, height:frame.size.height)
            scrollView.addSubview(imgView)
        }
        scrollView.contentOffset = CGPoint.zero
        self.view.addSubview(scrollView)
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        print("scrolled:(scrollView.contentOffset)")
        let twidth = CGFloat(numOfPages-1) * self.view.bounds.size.width
        //如果在最后一个页面继续滑动的话就会跳转到主页面
        if scrollView.contentOffset.x > twidth {
//            let mainStoryboard = UIStoryboard(name:"Main", bundle:nil)
//            let viewController = mainStoryboard.instantiateInitialViewController()
//           self.present(MainVC(), animated: true, completion: nil)
            let rootVC = UIApplication.shared.delegate as! AppDelegate
            rootVC.window?.rootViewController = MainVC()
        }
    }
}

2，在appdelegate里面写如下代码，判断是否第一次安装，

  //这里判断是否第一次启动APP
        if (!(UserDefaults.standard.bool(forKey: "everLaunched"))) {
            UserDefaults.standard.set(true, forKey:"everLaunched")
            let guideViewController = hDisplayViewController()
            self.window!.rootViewController=guideViewController;
            print("guideview launched!")
        }

如下图：

这样就完成了！

下面分享一个oc版的：

.h

@interface hDisplayView : UIView

.m ：注意实现代理方法，判断偏移量或者其他的都行，因为是view，也可以添加手机或者按钮（建议frame是全屏幕大小的），然后实现响应事件隐藏就行了！

#import "hDisplayView.h"

@interface hDisplayView ()<UIScrollViewDelegate>
{
    UIScrollView    *_bigScrollView;
    NSMutableArray  *_imageArray;
    UIPageControl   *_pageControl;
}

@end

@implementation hDisplayView

-(instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        _imageArray = [@[@"闪屏1.png",@"闪屏2.png", @"闪屏3.png",@"闪屏4.png"]mutableCopy];
        
//        _imageArray = [NSMutableArray arrayWithObjects:@"闪屏1.png",@"闪屏2.png", @"闪屏3.png",@"闪屏4.png", nil];
        
        UIScrollView *scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, MainScreen_width, MainScreen_height)];
        
        scrollView.contentSize = CGSizeMake((_imageArray.count + 1)*MainScreen_width, MainScreen_height);
        //设置反野效果，不允许反弹，不显示水平滑动条，设置代理为自己
        scrollView.pagingEnabled = YES;//设置分页
        scrollView.bounces = NO;
        scrollView.showsHorizontalScrollIndicator = NO;
        scrollView.delegate = self;
        [self addSubview:scrollView];
        _bigScrollView = scrollView;
        
        for (int i = 0; i < _imageArray.count; i++) {
            UIImageView *imageView = [[UIImageView alloc]init];
            imageView.frame = CGRectMake(i * MainScreen_width, 0, MainScreen_width, MainScreen_height);
            UIImage *image = [UIImage imageNamed:_imageArray[i]];
            imageView.image = image;
            
            [scrollView addSubview:imageView];
        }
        
        UIPageControl *pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(MainScreen_width/2, MainScreen_height - 60, 0, 40)];
        pageControl.numberOfPages = _imageArray.count;
        pageControl.backgroundColor = [UIColor clearColor];
        [self addSubview:pageControl];
        
        _pageControl = pageControl;
        
        //添加手势
        UITapGestureRecognizer *singleRecognizer;
        singleRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleSingleTapFrom)];
        singleRecognizer.numberOfTapsRequired = 1;
        [scrollView addGestureRecognizer:singleRecognizer];
        
    }
    
    return self;
}

-(void)handleSingleTapFrom
{
    if (_pageControl.currentPage == 3) {
        
        self.hidden = YES;
        
    }
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    if (scrollView == _bigScrollView) {
        
        CGPoint offSet = scrollView.contentOffset;
        
        _pageControl.currentPage = offSet.x/(self.bounds.size.width);//计算当前的页码
        [scrollView setContentOffset:CGPointMake(self.bounds.size.width * (_pageControl.currentPage), scrollView.contentOffset.y) animated:YES];
        
    }
    
    if (scrollView.contentOffset.x == (_imageArray.count) *MainScreen_width) {
        
        self.hidden = YES;
        
    }
    
}

调用：

if (![[NSUserDefaults standardUserDefaults] boolForKey:@"everLaunched"]) {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"everLaunched"];
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];
    }
    else{
        [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"firstLaunch"];
    }
    
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]) {
        // 这里判断是否第一次
        
        hDisplayView *hvc = [[hDisplayView alloc]initWithFrame:CGRectMake(0, 0, MainScreen_width, MainScreen_height)];
        
        [self.window.rootViewController.view addSubview:hvc];
        
        [UIView animateWithDuration:0.25 animations:^{
            hvc.frame = CGRectMake(0, 0, MainScreen_width, MainScreen_height);
            
        }];
        
    }

然后就可以了！

比较简单，只在此记录下！