【ios控件】UIScrollView 事件说明

//
//  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=100,moveLeft=100;
    
    _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=10,paddingL=10,paddingR=20,paddingB=20;
    
    _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=2;
    
    _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(200, 200) animated:NO];
    //_scrollViw .contentOffset=CGPointMake(200, 200);
}
@end