//
//  ViewController.m
//  图片放大
//
//  Created by 键盘上的舞者 on 15/5/21.
//  Copyright (c) 2015年 键盘上的舞者. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    UIImageView *_imageView;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    // Do any additional setup after loading the view, typically from a nib.
    //添加一个scrollView
    UIScrollView *scrollView=[[UIScrollView alloc] init];
    scrollView.frame=CGRectMake(0, 0, 320, 568);
    //scrollView.backgroundColor=[UIColor grayColor];
    [self.view addSubview:scrollView];
    //添加一个图片
    _imageView=[[UIImageView alloc] init];
    _imageView.image=[UIImage imageNamed:@"1.jpg"];
    CGFloat imgW=_imageView.image.size.width;
    CGFloat imgH=_imageView.image.size.height;
    _imageView.frame=CGRectMake(0, 0, imgW,imgH);
    [scrollView addSubview:_imageView];
    //设置scrollView的内容宽度和高度
    scrollView.contentSize=_imageView.image.size;
    scrollView.contentOffset=CGPointMake(250, 250);
    //设置是否显示水平或者垂直的滚动条
    scrollView.showsHorizontalScrollIndicator=NO;
    scrollView.showsVerticalScrollIndicator=NO;
    //设置偏移
    //细节：设置了contentOffset会忽略掉contentSize
    scrollView.contentOffset=CGPointMake(100, 100);
    //弹簧效果
    scrollView.bounces=YES;
    //添加代理
    scrollView.delegate=self;
    
    //设置缩放的比例
    scrollView.maximumZoomScale=2.0;
    scrollView.minimumZoomScale=0.2;
    
}
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
    return _imageView;
}


@end