iOS引导页面（点击进入主界面的）

import "yindaoViewController.h"

import "ViewController.h"

@interface yindaoViewController ()
{
UIScrollView *scrollV;
NSArray *imgArr;
}
@end

@implementation yindaoViewController

• (void)viewDidLoad {
  [super viewDidLoad];

// 滚动视图图
scrollV = [[UIScrollView alloc]initWithFrame:self.view.frame];
// 设置代理
scrollV.delegate =self;
// 将scroll 添加到加入到视图上
[self.view addSubview:scrollV];
// 图片数组
imgArr = @[@"1",@"2",@"3",@"4"];
// 使用for 来循环设置图片
for(int i =0; i <4; i++)
{
    // 设置图片框
    UIImageView *imgV = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.frame.size.width *i,0, self.view.frame.size.width, self.view.frame.size.height)];
    // 设置图片
    imgV.image = [UIImage imageNamed:imgArr[i]];
    // 允许与用户交互
    imgV.userInteractionEnabled = YES;
    
    if(i == 3){
        
        // 按钮
        UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake((self.view.frame.size.width-200)/2, 600, 200, 40)];
        // 标题
        [btn setTitle:@"立即体验" forState:UIControlStateNormal];
        // 按钮颜色
        btn.backgroundColor = [UIColor redColor];
        //按钮文字颜色
        [btn setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
        // 添加事件
        [btn addTarget:self action:@selector(GoTo) forControlEvents:UIControlEventTouchUpInside];
        
        [imgV addSubview:btn];
    }
    
    
    [scrollV addSubview:imgV];
    
}
// 设置滚动范围
scrollV.contentSize = CGSizeMake(self.view.frame.size.width *4, self.view.frame.size.height);
// 设置分页滚动
scrollV.pagingEnabled = YES;
// 隐藏水平滚动条
scrollV.showsHorizontalScrollIndicator =NO;

}
-(void)GoTo{

ViewController *main = [ViewController new];
// 采取从下往上的方式跳转
[self presentViewController:main animated:YES completion:nil];

}

@end

在AppDelegate里初始化刚才的页面