YYXC_School/LN_School/WelcomeVC.m

//
//  WelcomeVC.m
//  LNManager
//
//  Created by EchoShacolee on 2018/1/12.
//  Copyright © 2018年 lee. All rights reserved.
//

#import "WelcomeVC.h"
#import "LoginViewController.h"

@interface WelcomeVC ()<UIScrollViewDelegate>
{
    UIPageControl *pageControl;
}
@end

@implementation WelcomeVC

- (void)viewDidLoad {
    [super viewDidLoad];
    [self myInit];
}

-(void)myInit
{
    NSArray* images = @[@"下载欢迎页1.png",@"下载欢迎页2.png",@"下载欢迎页3.png"];
    UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, kSize.width, kSize.height)];
    /**跳到第5页，也会欢迎结束
     */
    [scroll setContentSize:CGSizeMake(kSize.width* images.count+1, 0)];
    [scroll setBounces:NO];
    [scroll setShowsHorizontalScrollIndicator:NO];
    scroll.delegate = self;
    scroll.pagingEnabled = YES;
    [self.view addSubview:scroll];
    
    pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(0, kSize.height-50, kSize.width, 20)];
    pageControl.numberOfPages = scroll.contentSize.width/scroll.frame.size.width;
    [self.view addSubview:pageControl];
    
    UIImageView* iv;
    for (int i =0; i<images.count; i++) {
        iv = [[UIImageView alloc] initWithFrame:kFrame];
        iv.x = kSize.width*i;
        [scroll addSubview:iv];
        [iv setImage:[UIImage imageNamed:images[i]]];
        if (i==images.count-1) {
            UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
            btn.frame = CGRectMake(kSize.width/2-45, kSize.height-90, 100, 40);
            btn.layer.masksToBounds = YES;
            btn.layer.cornerRadius = 8;
            btn.layer.borderWidth = 1;
            btn.layer.borderColor = [UIColor whiteColor].CGColor;
            [btn setTitle:@"请登录" forState:UIControlStateNormal];
            [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
            btn.backgroundColor = [UIColor clearColor];
            [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
            [iv addSubview:btn];
            iv.userInteractionEnabled = YES;
        }
    }
}

-(void)btnClick{
    
    LoginViewController * loginvc = [[LoginViewController alloc]init];
    [UIApplication sharedApplication].keyWindow.rootViewController = loginvc;
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    
    CGPoint off = scrollView.contentOffset;
    
    if (off.x / kSize.width > 2) {
        LoginViewController * loginvc = [[LoginViewController alloc]init];
        [UIApplication sharedApplication].keyWindow.rootViewController = loginvc;
    }
    
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
    pageControl.currentPage = scrollView.contentOffset.x/scrollView.frame.size.width;
}

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

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end