UIScrollView

//
//  RootViewController.m
//  Lesson06UIScrollView
//
//  Created by lanouhn on 16/1/7.
//  Copyright (c) 2016年 lanouhn. All rights reserved.
//

#import "RootViewController.h"

@interface RootViewController () {
UIScrollView *scrollView;
}

@end

@implementation RootViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor brownColor];
//UIScrollView, 继承于UIView, 滚动视图, 用于展示超出一个屏幕的内容.
//frame: 可视区域的大小和位置
//    scrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].bounds];
scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];
scrollView.backgroundColor = [UIColor orangeColor];
//内容页的大小, 内容页的大小必须超过可视区域的大小才可以滚动,能够装下要放的内容
scrollView.contentSize = CGSizeMake(1000, 1000);
//是否显示水平滚动条
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = NO;
//是否支持回弹
scrollView.bounces = YES;
//是否关闭滚动效果
scrollView.scrollEnabled = YES;
//点击状态栏滚到顶部
scrollView.scrollsToTop = YES;
//内容页的偏移量
scrollView.contentOffset = CGPointMake(0, 100);
[self.view addSubview:scrollView];
[scrollView release];

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(23, 0, 329, 924)];//图片除2, 对称放置
imageView.image = [UIImage imageNamed:@"11.jpg"];
//视图必须放到scrollView
[scrollView addSubview:imageView];
[imageView release];

UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake(320, 600, 50, 50);
//圆角半径
button.layer.cornerRadius = 25;
//描边宽度
button.layer.borderWidth = 1;
//描边颜色
button.layer.borderColor = [UIColor yellowColor].CGColor;
[button setTitle:@"顶部" forState:UIControlStateNormal];//正常状态
//button 关联方法
[button addTarget:self action:@selector(top) forControlEvents:UIControlEventTouchUpInside];//按下之后松手
[self.view addSubview:button];
[button release];

}

- (void)top {
//1.
//    scrollView.contentOffset = CGPointZero;
//2.有个缓慢的过程
[scrollView setContentOffset:CGPointZero animated:YES];
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/

//在建一个视图
//
//  ShowViewController.m
//  Lesson06UIScrollView
//
//  Created by lanouhn on 16/1/7.
//  Copyright (c) 2016年 lanouhn. All rights reserved.
//

#import "ShowViewController.h"

@interface ShowViewController ()

@end

@implementation ShowViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
//可视图的大小
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];
//内容可以放下所
scrollView.contentSize = CGSizeMake(375 * 4, 667);
//是否整屏滑动
scrollView.pagingEnabled = YES;
[self.view addSubview:scrollView];
[scrollView release];
for (NSInteger i = 0; i < 4; i++) {
//图片视图可以很好的放下图片(为了保证图片. 计算一下宽高)
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(375 * i, 0, 375, 667)];
NSString *name = [NSString stringWithFormat:@"%ld.jpg", i + 1];
imageView.image = [UIImage imageNamed:name];
[scrollView addSubview:imageView];
[imageView release];
}

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/

@end

@end