IOS研究院之滚动视图UIScrollView的简单应用（九）

//
//  ScrollViewController.m
//  ScrollView
//
//  Created by 雨松MOMO on 12-8-23.
//  Copyright (c) 2012年 雨松MOMO. All rights reserved.
//

#import "ScrollViewController.h"

@interface ScrollViewController ()

@end

@implementation ScrollViewController

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

    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    //设置ScrollView的整体触摸与显示区域
    //注意 宽 高不要超过 320X480
    //否则会出现无法滚动的情况
    _scrollView = [[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320,440)] autorelease];

    //设置ScrollView滚动内容的区域
    //它通常是需要大于ScrollerView的显示区域的
    //这样才有必要在ScrollerView中滚动它
    [_scrollView setContentSize:CGSizeMake(320 * 5, 240)];

    //开启滚动分页功能，如果不需要这个功能关闭即可
    [_scrollView setPagingEnabled:YES];

    //隐藏横向与纵向的滚动条
    [_scrollView setShowsVerticalScrollIndicator:NO];
    [_scrollView setShowsHorizontalScrollIndicator:NO];

    //在本类中代理scrollView的整体事件
    [_scrollView setDelegate:self];

    //如果你打开横向或纵向的滚动条，这里可以设置滚动条的风格
    // UIScrollViewIndicatorStyleDefault, 默认风格
    // UIScrollViewIndicatorStyleBlack,   黑色风格
    // UIScrollViewIndicatorStyleWhite    白色风格
    //[_scrollView setIndicatorStyle:UIScrollViewIndicatorStyleBlack]

    for (int i =0; i<5; i++)
    {

        //在这里给每一个ScrollView添加一个图片 和一个按钮
        UIImageView *imageView= [[[UIImageView alloc] initWithFrame:CGRectMake(i * 320,0,320,440)] autorelease];
        [imageView setImage:[UIImage imageNamed:@"image.png"]];

        UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        button.frame = CGRectMake(i * 320, 10, 100, 30);

        [button setTitle:@"这是一个按钮" forState:UIControlStateNormal];

        [button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];

        //把每页需要显示的VIEW添加进ScrollerView中
        [_scrollView addSubview:imageView];
        [_scrollView addSubview:button];
    }

    //整体再将ScrollerView显示在窗口中
    [self.view addSubview:_scrollView];

    //页面控制小工具
    //它会在底部绘制小圆点标志当前显示页面
    _pageControl = [[[UIPageControl alloc] initWithFrame:CGRectMake(0, 440,self.view.frame.size.width, 20)]autorelease];
    //设置页面的数量
    [_pageControl setNumberOfPages:5];
    //监听页面是否发生改变
    [_pageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:_pageControl];

}

- (void)changePage:(id)sender
{
    //得到当前页面的ID
   //int page = [sender currentPage];

    //在这里写你需要执行的代码
    //......
}

//手指离开屏幕后ScrollView还会继续滚动一段时间只到停止
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{

   NSLog(@"结束滚动后缓冲滚动彻底结束时调用");
}

-(void) scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{

  NSLog(@"结束滚动后开始缓冲滚动时调用");
}

-(void)scrollViewDidScroll:(UIScrollView*)scrollView

{
     //页面滚动时调用，设置当前页面的ID
     [_pageControl setCurrentPage:fabs(scrollView.contentOffset.x/self.view.frame.size.width)];
    NSLog(@"视图滚动中X轴坐标%f",scrollView.contentOffset.x);
    NSLog(@"视图滚动中X轴坐标%f",scrollView.contentOffset.y);
}

-(void)scrollViewWillBeginDragging:(UIScrollView*)scrollView
{
    NSLog(@"滚动视图开始滚动，它只调用一次");
}

-(void)scrollViewDidEndDragging:(UIScrollView*)scrollView willDecelerate:(BOOL)decelerate
{
   NSLog(@"滚动视图结束滚动，它只调用一次");

}

-(void)buttonClick
{
    NSLog(@"按钮点击了");

}

- (void)viewDidUnload
{
    [super viewDidUnload];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end