define BOOLFORKEY @"GuidePage"

@interface GuidePageView ()<UIScrollViewDelegate>

@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, strong) UIPageControl *pageControl;

@end

@implementation GuidePageView

(instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
```
  [self show];
```
}

return self;
}

(void)show
{

if (![[NSUserDefaults standardUserDefaults] boolForKey:BOOLFORKEY]) {

  [[NSUserDefaults standardUserDefaults] setBool:YES forKey:BOOLFORKEY];
  // 自定义引导界面
  [self pushGuideView];

}

// 加载视图

(void)pushGuideView
{
UIWindow *window = [UIApplication sharedApplication].keyWindow;
self.frame = window.bounds;
[window addSubview:self];

_scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
[self addSubview:_scrollView];
_scrollView.backgroundColor = [UIColor whiteColor];
_scrollView.delegate = self;
_scrollView.contentSize = CGSizeMake(SCREEN_WIDTH * 4, SCREEN_HEIGHT);
_scrollView.bounces = NO;
_scrollView.pagingEnabled = YES;
_scrollView.showsHorizontalScrollIndicator = NO;

for (NSInteger i = 0; i < 4; i++) {

  UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(SCREEN_WIDTH * i, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
  NSString *imageName = [NSString stringWithFormat:@"start_%ld",i + 1];
  imageView.image = [UIImage imageNamed:imageName];
  imageView.userInteractionEnabled = YES;
  
  if (i == 3) {
      
      UIButton *startBtn = [UIButton buttonWithType:UIButtonTypeSystem];
      [startBtn setTitle:@"开始体验" forState:UIControlStateNormal];
      startBtn.layer.masksToBounds = YES;
      [startBtn setTitleColor:[UIColor colorWithHex:@"722b04"] forState:UIControlStateNormal];
      startBtn.titleLabel.font = [UIFont systemFontOfSize:19];
      startBtn.layer.cornerRadius = 20;
      startBtn.backgroundColor = [UIColor colorWithHex:kAppDefaultColor_yellow];
      [startBtn addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
      [imageView addSubview:startBtn];

      [startBtn mas_makeConstraints:^(MASConstraintMaker *make) {
          make.bottom.equalTo(imageView.mas_bottom).offset(-50);
          make.centerX.equalTo(imageView.mas_centerX);
          make.width.equalTo(@170);
          make.height.equalTo(@40);
      }];
      
  }
  
  [_scrollView addSubview:imageView];

}

_pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(SCREEN_WIDTH * 0.0, SCREEN_HEIGHT * 0.9, SCREEN_WIDTH * 1.0, SCREEN_HEIGHT * 0.1)];
_pageControl.currentPage = 0;
_pageControl.numberOfPages = 4;
_pageControl.pageIndicatorTintColor = [UIColor grayColor];
_pageControl.currentPageIndicatorTintColor = [UIColor colorWithHex:kAppDefaultColor_yellow];
[self addSubview:_pageControl];
}

(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollview
{
int page = scrollview.contentOffset.x / scrollview.frame.size.width;
[_pageControl setCurrentPage:page];
}
(void)buttonClick
{
[UIView animateWithDuration:1.5 animations:^{
```
  self.alpha = 0;
```
} completion:^(BOOL finished) {
```
  [self removeFromSuperview];
```
}];
}