UIscrollView 代理

 //
 //  UIDemoViewController.m
 //  06-1UIScrollDemo
 //
 //  Created by k on 14-9-4.
 //  Copyright (c) 2014年 com.akleee.www. All rights reserved.
 //

 #import "UIDemoViewController.h"

 @interface UIDemoViewController ()<UIScrollViewDelegate>
 @property (weak, nonatomic) IBOutlet UIScrollView *scrollViw;
 @property (weak, nonatomic) IBOutlet UIImageView *img;

 - (IBAction)changeOffset:(id)sender;

 @end

 @implementation UIDemoViewController

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
     //NSLog(@"%@",NSStringFromCGRect(_img.frame));

     //设置可移动区域
     _scrollViw.contentSize=_img.bounds.size;

     //可视窗口位置
     int moveTop=,moveLeft=;

     _scrollViw.contentOffset=CGPointMake(moveTop, moveLeft);

     //可视窗口大小
    //int windowW=100,windowH=400,windowX=10,windowY=20;
    // _scrollViw.frame=CGRectMake(windowX, windowY, windowW, windowH);

     //外边距
     int paddingT=,paddingL=,paddingR=,paddingB=;

     _scrollViw.contentInset=UIEdgeInsetsMake(paddingT, paddingL, paddingB, paddingR);

     //水平滚动条
 //    _scrollViw.showsHorizontalScrollIndicator=NO;
 //
 //    //垂直滚动条
 //    _scrollViw.showsVerticalScrollIndicator=NO;

     _scrollViw.delegate=self;

     _scrollViw.maximumZoomScale=;

     _scrollViw.minimumZoomScale=0.1;

 }

 - (void)didReceiveMemoryWarning
 {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }
 -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
     //开始拖拽
     //NSLog(@"scrollViewWillBeginDragging %@",NSStringFromCGPoint(scrollView.contentOffset));

 }
 -(void)scrollViewDidScroll:(UIScrollView *)scrollView   {
     //正在拖拽
     //NSLog(@"scrollViewDidScroll %@",NSStringFromCGPoint(scrollView.contentOffset));
 }

 -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
     //拖拽结束
     //NSLog(@"scrollViewDidEndDragging %@",NSStringFromCGPoint(scrollView.contentOffset));
 }

 -(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
     //拖动后开始滑行
     //NSLog(@"scrollViewWillBeginDecelerating %@",NSStringFromCGPoint(scrollView.contentOffset));
 }
 -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

     //拖动后滑行结束
     //NSLog(@"scrollViewDidEndDecelerating %@",NSStringFromCGPoint(scrollView.contentOffset));

 }
 -(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
     //滑动到下方内容 点击系统顶部导航 自动定位到顶部时触发
     //NSLog(@"scrollViewDidScrollToTop %@",NSStringFromCGPoint(scrollView.contentOffset));

 }

 -(BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
     //滑动到下方内容 点击系统顶部导航
     NSLog(@"scrollViewShouldScrollToTop %@",NSStringFromCGPoint(scrollView.contentOffset));
     //返回是否 自动定位到顶部
     return NO;
 }

 -(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
     // 当触发[_scrollViw setContentOffset:CGPointMake(200, 200) animated:YES];后  触发此事件
     //如果animated:NO的话  不会触发此事件
     //NSLog(@"scrollViewDidEndScrollingAnimation %@",NSStringFromCGPoint(scrollView.contentOffset));
 }

 -(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
     //设置需要缩放的UIView
    // NSLog(@"viewForZoomingInScrollView %@",NSStringFromCGPoint(scrollView.contentOffset));

     return _img;

 }

 -(void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view{
     //开始缩放
     NSLog(@"scrollViewWillBeginZooming");

 }

 -(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale
 {
     //结束缩放
     NSLog(@"scrollViewDidEndZooming");

 }

 - (IBAction)changeOffset:(id)sender {
     NSLog(@"change offset");
     [_scrollViw setContentOffset:CGPointMake(, ) animated:NO];
     //_scrollViw .contentOffset=CGPointMake(200, 200);
 }
 @end