引导页

作者: pingui | 来源:发表于2016-01-07 15:23 被阅读419次

第一种方法: 通过点击按键的方式进入应用###

该方法需要两个视图控制器，一个用来创建引导页的滚动视图，另一个创建应用界面

在AppDelegate.m文件中实现下面的方法

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    NSUserDefaults *useDef = [NSUserDefaults standardUserDefaults];
    // 使用 NSUserDefaults 读取用户数据
    if (![useDef boolForKey:@"notFirst"]) {
        // 如果是第一次进入引导页
        _window.rootViewController = [[ViewController alloc] init];
    }
    else{
        // 否则直接进入应用
        _window.rootViewController = [[GPSecondViewController alloc] init];
    }
    return YES;
}

引导页视图控制器

#import "ViewController.h"
#import "GPSecondViewController.h"

#define WIDTH (NSInteger)self.view.bounds.size.width
#define HEIGHT (NSInteger)self.view.bounds.size.height

@interface ViewController ()<UIScrollViewDelegate>
{
    // 创建页码控制器
    UIPageControl *pageControl;
    // 判断是否是第一次进入应用
    BOOL flag;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIScrollView *myScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
    for (int i=0; i<3; i++) {
        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",i+1]];
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(WIDTH * i, 0, WIDTH, HEIGHT)];
        // 在最后一页创建按钮
        if (i == 2) {
            // 必须设置用户交互 否则按键无法操作
            imageView.userInteractionEnabled = YES;
            UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
            button.frame = CGRectMake(WIDTH / 3, HEIGHT * 7 / 8, WIDTH / 3, HEIGHT / 16);
            [button setTitle:@"点击进入" forState:UIControlStateNormal];
            [button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
            [button addTarget:self action:@selector(go:) forControlEvents:UIControlEventTouchUpInside];
            [imageView addSubview:button];
        }
        imageView.image = image;
        [myScrollView addSubview:imageView];
    }
    myScrollView.bounces = NO;
    myScrollView.pagingEnabled = YES;
    myScrollView.showsHorizontalScrollIndicator = NO;
    myScrollView.contentSize = CGSizeMake(WIDTH * 3, HEIGHT);
    myScrollView.delegate = self;
    [self.view addSubview:myScrollView];
    
    pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(WIDTH / 3, HEIGHT * 15 / 16, WIDTH / 3, HEIGHT / 16)];
    // 设置页数
    pageControl.numberOfPages = 3;
    // 设置页码的点的颜色
    pageControl.pageIndicatorTintColor = [UIColor yellowColor];
    // 设置当前页码的点颜色
    pageControl.currentPageIndicatorTintColor = [UIColor redColor];

    [self.view addSubview:pageControl];
}

#pragma mark - UIScrollViewDelegate
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    // 计算当前在第几页
    pageControl.currentPage = (NSInteger)(scrollView.contentOffset.x / [UIScreen mainScreen].bounds.size.width);
}

// 点击按钮保存数据并切换根视图控制器
- (void) go:(UIButton *)sender{
    flag = YES;
    
    NSUserDefaults *useDef = [NSUserDefaults standardUserDefaults];
    // 保存用户数据
    [useDef setBool:flag forKey:@"notFirst"];
    [useDef synchronize];
    // 切换根视图控制器
    self.view.window.rootViewController = [[GPSecondViewController alloc] init];
}

@end

引导页-按键.png

点击按钮进入应用界面

应用界面.png

第二种方法: 通过滑动方式进入应用###

该方法只需要一个视图控制器，如果用户第一次使用才创建引导页的滚动视图，否则直接进入应用

#import "ViewController.h"

#define WIDTH (NSInteger)self.view.bounds.size.width
#define HEIGHT (NSInteger)self.view.bounds.size.height

@interface ViewController ()<UIScrollViewDelegate>
{
    UIPageControl *pageControl;
    UIScrollView *myScrollView;
    BOOL flag;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor cyanColor];
    
    UILabel *label = [[UILabel alloc] initWithFrame:[UIScreen mainScreen].bounds];
    label.text = @"欢迎使用xxx";
    label.textAlignment = NSTextAlignmentCenter;
    label.font = [UIFont systemFontOfSize:28];
    [self.view addSubview:label];

    NSUserDefaults *userDef = [NSUserDefaults standardUserDefaults];
    
    // 如果是第一次启动就创建myScrollView
    if (![userDef boolForKey:@"notFirst"]) {
        myScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
        for (int i=0; i<3; i++) {
            UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",i + 1]];
            UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(WIDTH * i, 0, WIDTH, HEIGHT)];
            imageView.image = image;
            [myScrollView addSubview:imageView];
        }
        myScrollView.delegate = self;
        myScrollView.bounces = NO;
        myScrollView.pagingEnabled = YES;
        myScrollView.showsHorizontalScrollIndicator = NO;
        // 提示:滚动视图的宽度要设成4倍
        myScrollView.contentSize = CGSizeMake(WIDTH * 4, HEIGHT);
        [self.view addSubview:myScrollView];
        
        pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, HEIGHT - 40, WIDTH, 40)];
        pageControl.numberOfPages = 3;
        pageControl.currentPage = 0;
        pageControl.pageIndicatorTintColor = [UIColor whiteColor];
        pageControl.currentPageIndicatorTintColor = [UIColor greenColor];
        [self.view addSubview:pageControl];
        
        // 保存数据
        flag = YES;
        [userDef setBool:flag forKey:@"notFirst"];
        [userDef synchronize];
    }
}

#pragma mark - UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    CGFloat x = myScrollView.contentOffset.x;
    if (scrollView == myScrollView) {
        // 四舍五入
        pageControl.currentPage = lroundf(x / WIDTH);
    }
    // 当滑动到第4页时移除myScrollView和pageControl
    if (lroundf(x / WIDTH) == 3) {
        [myScrollView removeFromSuperview];
        [pageControl removeFromSuperview];
    }
}
@end

引导页-滑动.png

向左滑动进入应用界面

第一种方法: 通过点击按键的方式进入应用###

该方法需要两个视图控制器，一个用来创建引导页的滚动视图，另一个创建应用界面

在AppDelegate.m文件中实现下面的方法

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    NSUserDefaults *useDef = [NSUserDefaults standardUserDefaults];
    // 使用 NSUserDefaults 读取用户数据
    if (![useDef boolForKey:@"notFirst"]) {
        // 如果是第一次进入引导页
        _window.rootViewController = [[ViewController alloc] init];
    }
    else{
        // 否则直接进入应用
        _window.rootViewController = [[GPSecondViewController alloc] init];
    }
    return YES;
}

引导页视图控制器

#import "ViewController.h"
#import "GPSecondViewController.h"

#define WIDTH (NSInteger)self.view.bounds.size.width
#define HEIGHT (NSInteger)self.view.bounds.size.height

@interface ViewController ()<UIScrollViewDelegate>
{
    // 创建页码控制器
    UIPageControl *pageControl;
    // 判断是否是第一次进入应用
    BOOL flag;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIScrollView *myScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
    for (int i=0; i<3; i++) {
        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",i+1]];
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(WIDTH * i, 0, WIDTH, HEIGHT)];
        // 在最后一页创建按钮
        if (i == 2) {
            // 必须设置用户交互 否则按键无法操作
            imageView.userInteractionEnabled = YES;
            UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
            button.frame = CGRectMake(WIDTH / 3, HEIGHT * 7 / 8, WIDTH / 3, HEIGHT / 16);
            [button setTitle:@"点击进入" forState:UIControlStateNormal];
            [button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
            [button addTarget:self action:@selector(go:) forControlEvents:UIControlEventTouchUpInside];
            [imageView addSubview:button];
        }
        imageView.image = image;
        [myScrollView addSubview:imageView];
    }
    myScrollView.bounces = NO;
    myScrollView.pagingEnabled = YES;
    myScrollView.showsHorizontalScrollIndicator = NO;
    myScrollView.contentSize = CGSizeMake(WIDTH * 3, HEIGHT);
    myScrollView.delegate = self;
    [self.view addSubview:myScrollView];
    
    pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(WIDTH / 3, HEIGHT * 15 / 16, WIDTH / 3, HEIGHT / 16)];
    // 设置页数
    pageControl.numberOfPages = 3;
    // 设置页码的点的颜色
    pageControl.pageIndicatorTintColor = [UIColor yellowColor];
    // 设置当前页码的点颜色
    pageControl.currentPageIndicatorTintColor = [UIColor redColor];

    [self.view addSubview:pageControl];
}

#pragma mark - UIScrollViewDelegate
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    // 计算当前在第几页
    pageControl.currentPage = (NSInteger)(scrollView.contentOffset.x / [UIScreen mainScreen].bounds.size.width);
}

// 点击按钮保存数据并切换根视图控制器
- (void) go:(UIButton *)sender{
    flag = YES;
    
    NSUserDefaults *useDef = [NSUserDefaults standardUserDefaults];
    // 保存用户数据
    [useDef setBool:flag forKey:@"notFirst"];
    [useDef synchronize];
    // 切换根视图控制器
    self.view.window.rootViewController = [[GPSecondViewController alloc] init];
}

@end

引导页-按键.png

点击按钮进入应用界面

应用界面.png

第二种方法: 通过滑动方式进入应用###

该方法只需要一个视图控制器，如果用户第一次使用才创建引导页的滚动视图，否则直接进入应用

#import "ViewController.h"

#define WIDTH (NSInteger)self.view.bounds.size.width
#define HEIGHT (NSInteger)self.view.bounds.size.height

@interface ViewController ()<UIScrollViewDelegate>
{
    UIPageControl *pageControl;
    UIScrollView *myScrollView;
    BOOL flag;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor cyanColor];
    
    UILabel *label = [[UILabel alloc] initWithFrame:[UIScreen mainScreen].bounds];
    label.text = @"欢迎使用xxx";
    label.textAlignment = NSTextAlignmentCenter;
    label.font = [UIFont systemFontOfSize:28];
    [self.view addSubview:label];

    NSUserDefaults *userDef = [NSUserDefaults standardUserDefaults];
    
    // 如果是第一次启动就创建myScrollView
    if (![userDef boolForKey:@"notFirst"]) {
        myScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
        for (int i=0; i<3; i++) {
            UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",i + 1]];
            UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(WIDTH * i, 0, WIDTH, HEIGHT)];
            imageView.image = image;
            [myScrollView addSubview:imageView];
        }
        myScrollView.delegate = self;
        myScrollView.bounces = NO;
        myScrollView.pagingEnabled = YES;
        myScrollView.showsHorizontalScrollIndicator = NO;
        // 提示:滚动视图的宽度要设成4倍
        myScrollView.contentSize = CGSizeMake(WIDTH * 4, HEIGHT);
        [self.view addSubview:myScrollView];
        
        pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, HEIGHT - 40, WIDTH, 40)];
        pageControl.numberOfPages = 3;
        pageControl.currentPage = 0;
        pageControl.pageIndicatorTintColor = [UIColor whiteColor];
        pageControl.currentPageIndicatorTintColor = [UIColor greenColor];
        [self.view addSubview:pageControl];
        
        // 保存数据
        flag = YES;
        [userDef setBool:flag forKey:@"notFirst"];
        [userDef synchronize];
    }
}

#pragma mark - UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    CGFloat x = myScrollView.contentOffset.x;
    if (scrollView == myScrollView) {
        // 四舍五入
        pageControl.currentPage = lroundf(x / WIDTH);
    }
    // 当滑动到第4页时移除myScrollView和pageControl
    if (lroundf(x / WIDTH) == 3) {
        [myScrollView removeFromSuperview];
        [pageControl removeFromSuperview];
    }
}
@end

引导页-滑动.png

向左滑动进入应用界面

应用界面.png

引导页

第一种方法: 通过点击按键的方式进入应用###

第二种方法: 通过滑动方式进入应用###

第一种方法: 通过点击按键的方式进入应用###

第二种方法: 通过滑动方式进入应用###

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