//

//  ViewController.m

//  UIScrollView01

//

//  Created by cqy on 16/2/15.

//  Copyright © 2016年 程清杨. All rights reserved.

//

#import "ViewController.h"

#define WIDTH   [[UIScreen mainScreen] bounds].size.width

#define HEIGHT  [[UIScreen mainScreen]bounds].size.height

@interface ViewController ()<UIScrollViewDelegate>{

    UIScrollView *scroll;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

  

    UIImageView *img = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"a"]];

    img.frame = CGRectMake(100, 0, 150, 150);

    //设置tag值，为了后⾯缩放的delegate（在controller⾥）取到img

    img.tag = 100;

   

    scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 130, WIDTH, 150)];

    scroll.backgroundColor = [UIColor greenColor];

    //属性

    //contentsize，能够滑动的决定性因素(能够决定滚动的范围)

    scroll.contentSize = CGSizeMake(2*WIDTH, 600);

    //contentOffset 偏移

   // scroll.contentOffset = CGPointMake(-50, -50);

    //返回顶部

    scroll.scrollsToTop = YES;

    //整页滑动

    scroll.pagingEnabled = YES;

    //边界反弹

    scroll.bounces = YES;

    //能否滚动

    scroll.scrollEnabled = YES;

    //水平滚动条

    scroll.showsHorizontalScrollIndicator = YES;

    //垂直滚动条

    scroll.showsVerticalScrollIndicator = YES;

    scroll.delegate = self;

    [self.view addSubview:scroll];

   

    [scroll addSubview:img];

    // Do any additional setup after loading the view, typically from a nib.

}

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

      NSLog(@"已经滚动...");

}

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

    NSLog(@"将要开始拖拽..");

}

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{

     NSLog(@"已经结束拖拽..");

}

-(void)scrollViewWillBeginDecelerating:(UIScrollView

                                       *)scrollView{

    NSLog(@"将要开始减速..");

}

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

    NSLog(@"结束减速..");

}

// 缩放有关

// 缩放开始

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{

   

    return [scrollView viewWithTag:100];

}

// 缩放结束

-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale{

    NSLog(@"结束....");

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end