#import "UIImage+WHBLAP.h"

@implementation UIImage (WHBLAP)
+ (UIImage *)fullScreenImage:(NSString *)imgName
{
    if (isIPhone5)
    {
        //    1.获取图片的扩展名
        NSString *ext = [imgName pathExtension];
        //    2.除去图片的扩展名
        imgName = [imgName stringByDeletingPathExtension];
        //    3.拼接iPhone5图片表示
        imgName = [imgName stringByAppendingString:@"-568h@2x"];
        //    4.拼接原有图片的扩展名
        imgName = [imgName stringByAppendingString:ext];
    }
    return  [self imageNamed:imgName];
}
@end

//
//  NewFeatureViewController.m
//  新浪微博控
//
//  Created by whblap on 14-6-02.
//  Copyright (c) 2014年 whblap. All rights reserved.
//

#import "NewFeatureViewController.h"
#import "UIImage+WHBLAP.h"
#import "MainViewController.h"

#define  kCount 4
@interface NewFeatureViewController ()<UIScrollViewDelegate>
{
    UIPageControl *_page;
    UIScrollView *_scroll;
}
@end

@implementation NewFeatureViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
//    self.view.backgroundColor = [UIColor whiteColor];
    
    // 1.添加UIScrollView
    [self addUIScrollView];
    
    // 2.添加图片
    [self addScrollImages];
    
    // 3.添加UIPageControl
    [self addPageControll];
    
}

#pragma mark -  自定义加载视图
- (void)loadView
{
    UIImageView *imageView = [[UIImageView alloc] init];
    imageView.image = [UIImage fullScreenImage:@"new_feature_background.png"];
    imageView.frame = [UIScreen mainScreen].applicationFrame;
    // imageView视图本身不带触摸交互等 使用UserInteractionEnable来进行设置 设置为 用户交互为可交互的
    imageView.userInteractionEnabled = YES;  // 用户交互 接收事件
    self.view = imageView;
}

#pragma mark - UI界面初始化
#pragma mark 添加滚动视图
- (void)addUIScrollView
{
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds]; // 初始化界面位置大小
    CGSize size = scrollView.frame.size;   // scrollView的宽高
    scrollView.contentSize = CGSizeMake((size.width * kCount), 0);  // 内容尺寸
    scrollView.showsHorizontalScrollIndicator = NO;  // 隐藏水平滚动条
    scrollView.pagingEnabled = YES;    // 设置分页
    scrollView.delegate = self;   // 添加代理
    _scroll = scrollView;
    [self.view addSubview:_scroll];
}

#pragma mark - 添加滚动显示的图片
- (void)addScrollImages
{
    CGSize size = _scroll.frame.size; // 滚动视图的宽高
    for (int i = 0; i<kCount; i++) {
//        1.添加滚动的图片
        // 1》.初始化 UIImageView宽高
        UIImageView *imageView = [[UIImageView alloc] init];
        imageView.frame = CGRectMake(i * size.width, 0, size.width, size.height);
        
        // 2》.添加通过图片名创建图片 加载到imageView
        NSString *imageName = [NSString stringWithFormat:@"new_feature_%d.png",i + 1];
        UIImage *image = [UIImage fullScreenImage:imageName];
        imageView.image = image;
        
        // 3》.向ScrollView添加imageView
        [_scroll addSubview:imageView];
        
        
//         2.最后一页 添加两个按钮
        if (i == kCount-1) {
            
            
// ************分享按钮
            // 普通状态显示的图片（selected=NO）
            UIImage *shareNormal = [UIImage imageNamed:@"new_feature_share_false.png"];
//            1>.创建一个自定义按钮
            UIButton *shareBtn =[UIButton buttonWithType:UIButtonTypeCustom];
            
//            2>.根据中心位置 和控件自身的宽高初始化UIButton位置
            shareBtn.center = CGPointMake(size.width * 0.5, size.height*0.8 - 50);
            shareBtn.bounds = CGRectMake(0, 0,shareNormal.size.width , shareNormal.size.height);
            
//            3>.设置UIButton的背景图片
            [shareBtn setBackgroundImage:shareNormal forState:UIControlStateNormal];  // 普通状态显示的图片（selected=NO）
            [shareBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_share_true.png"] forState:UIControlStateSelected];  // 选中状态显示的图片（selected=YES）

//            4>.给UIButton添加监听事件
            [shareBtn addTarget:self action:@selector(shareClick:) forControlEvents:
             UIControlEventTouchUpInside];
            
            // 按钮变为UIControlStateDisable状态
            //             share.enabled = NO;
            // 默认为选择状态
            shareBtn.selected = YES;
            
            // 按钮在高亮的时候不需要变灰色
            shareBtn.adjustsImageWhenHighlighted = NO;
            

//            5>.将UIButton添加到视图中
            [imageView addSubview:shareBtn];
        
            
// ************开始按钮
            UIImage *startNormal = [UIImage imageNamed:@"new_feature_finish_button.png"];
            UIImage *startHightlighted = [UIImage imageNamed:@"new_feature_finish_button_highlighted.png"];
            
//            1>.创建一个自定义按钮
            UIButton *startBtn = [UIButton buttonWithType:UIButtonTypeCustom];
            
//            2>.根据中心位置 和控件自身的宽高初始化UIButton位置
            startBtn.center = CGPointMake(size.width * 0.5, size.height*0.8);
            startBtn.bounds = CGRectMake(0, 0,startNormal.size.width , startNormal.size.height);
            
//            3>.设置UIButton的背景图片
            [startBtn setBackgroundImage:startNormal forState:UIControlStateNormal];
            [startBtn setBackgroundImage:startHightlighted forState:UIControlStateHighlighted];
            
//            4>.给UIButton添加监听事件
            [startBtn addTarget:self action:@selector(startClick) forControlEvents:
             UIControlEventTouchUpInside];
            
//            5>.将UIButton添加到imageView视图中
            [imageView addSubview:startBtn];
            
        }
        imageView.userInteractionEnabled = YES;
    }
}

#pragma mark - 添加分页指示器
- (void)addPageControll
{
//    1.得到视图的宽高
    CGSize size = self.view.frame.size;
    
//    2.根据中心位置 和控件自身的宽高初始化UIPageControl的位置
    UIPageControl *page = [[UIPageControl alloc]init];
    page.center =  CGPointMake(size.width * 0.5, size.height * 0.95);
    page.bounds = CGRectMake(0, 0, 150, 0);
    
//    3.设置page页数
    page.numberOfPages = kCount;
    
//    4.设置当前page指示器的色彩颜色
    page.currentPageIndicatorTintColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"new_feature_pagecontrol_checked_point.png"]];
    
//    5.设置默认指示器色彩颜色
    page.pageIndicatorTintColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"new_feature_pagecontrol_point.png"]];
    
//    6.为PageControll添加监听方法
    [page addTarget:self action:@selector(updatePageChanged:) forControlEvents:UIControlEventValueChanged];
    
//    7.将PageControll添加到视图
    _page = page;
    [self.view addSubview:_page];
    
}

#pragma mark - 滚动代理方法
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    // 当前页面值 = 滚动          ps: contentOffset 是scrollview当前显示区域顶点相对于frame顶点的偏移量
    _page.currentPage = scrollView.contentOffset.x / scrollView.frame.size.width;
    
    NSLog(@"%d", _page.currentPage);
}

#pragma mark - 分页控件的监听方法
- (void)updatePageChanged:(UIPageControl *)pageControl

{
    NSLog(@"%d",pageControl.currentPage);
    CGFloat  contOffsetX = pageControl.currentPage * _scroll.bounds.size.width;
    [_scroll setContentOffset:CGPointMake(contOffsetX,0)  animated:YES];
}

#pragma mark - 监听按钮点击
#pragma mark 开始
- (void)startClick
{
//    显示状态栏
    [UIApplication sharedApplication].statusBarHidden = NO;
//    显示到主界面     ps：控制器的View会延迟加载 需要显示或用到的时候会加载
    self.view.window.rootViewController = [[MainViewController alloc] init];
}
#pragma mark 分享
- (void)shareClick:(UIButton *)btn
{
    btn.selected = !btn.selected;
}
@end