UI1_UIScrollView

//
//  AppDelegate.m
//  UI1_UIScrollView
//
//  Created by zhangxueming on 15/7/10.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "AppDelegate.h"
#import "ViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
ViewController *root = [[ViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:root];
self.window.rootViewController = nav;
self.window.backgroundColor = [UIColor whiteColor];

return YES;
}

//
//  ViewController.h
//  UI1_UIScrollView
//
//  Created by zhangxueming on 15/7/10.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIScrollViewDelegate>

@end

//
//  ViewController.m
//  UI1_UIScrollView
//
//  Created by zhangxueming on 15/7/10.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *path = [[NSBundle mainBundle] pathForResource:@"image" ofType:@"png"];
UIImage *image = [UIImage imageWithContentsOfFile:path];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, image.size.width, image.size.height)];
imageView.image = image;
//[self.view addSubview:imageView];
//创建滚动视图
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height)];
//设置内容视图的大小
//跟imageView的大小相同
scrollView.contentSize = CGSizeMake(imageView.frame.size.width, imageView.frame.size.height);
[scrollView addSubview:imageView];
scrollView.backgroundColor = [UIColor redColor];
//消除导航栏的影响,显示的视图不被导航栏覆盖
self.automaticallyAdjustsScrollViewInsets = NO;

//隐藏滚动条
//横向的指示条
scrollView.showsHorizontalScrollIndicator = NO;
//竖向的指示条
scrollView.showsVerticalScrollIndicator = YES;

//设置边界回弹
scrollView.bounces = YES;
//滚动视图的偏移, 相对于内容视图的偏移
scrollView.contentOffset = CGPointMake(0, 0);
//设置分页
//必然有一个减速的过程
scrollView.pagingEnabled = YES;
//是否滚动
scrollView.scrollEnabled = YES;

//[scrollView setContentOffset:CGPointMake(-100, -100) animated:YES];
//[scrollView flashScrollIndicators];

//设置放大缩小的系数
scrollView.delegate = self;
scrollView.minimumZoomScale  = 0.2;
scrollView.maximumZoomScale  = 3;

[self.view addSubview:scrollView];
}

#pragma mark --UIScrollViewDelegate---
//视图发生滚动时调用
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
//NSLog(@"----滚动----");
}
//视图发生拖拽的时候调用
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
NSLog(@"----拉拽----");
}

//拖拽结束时调用
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
NSLog(@"decelerate = %i", decelerate);
if (decelerate) {
NSLog(@"拖拽减速");
}
}
//返回要放大子视图
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
NSLog(@"图片被放大");

return [scrollView.subviews objectAtIndex:0];
}

//当有减速过程的时候才被调用
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
NSLog(@"开始减速");
}
//如果设置分页使能, 那么该方法肯定被调用
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
NSLog(@"减速结束");
}

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

@end