【ios控件】UIScrollView 事件说明

  1 //
  2 //  UIDemoViewController.m
  3 //  06-1UIScrollDemo
  4 //
  5 //  Created by k on 14-9-4.
  6 //  Copyright (c) 2014年 com.akleee.www. All rights reserved.
  7 //
  8 
  9 #import "UIDemoViewController.h"
 10 
 11 @interface UIDemoViewController ()<UIScrollViewDelegate>
 12 @property (weak, nonatomic) IBOutlet UIScrollView *scrollViw;
 13 @property (weak, nonatomic) IBOutlet UIImageView *img;
 14 
 15 - (IBAction)changeOffset:(id)sender;
 16 
 17 
 18 @end
 19 
 20 @implementation UIDemoViewController
 21 
 22 - (void)viewDidLoad
 23 {
 24     [super viewDidLoad];
 25     // Do any additional setup after loading the view, typically from a nib.
 26     //NSLog(@"%@",NSStringFromCGRect(_img.frame));
 27     
 28     //设置可移动区域
 29     _scrollViw.contentSize=_img.bounds.size;
 30     
 31     //可视窗口位置
 32     int moveTop=100,moveLeft=100;
 33     
 34     _scrollViw.contentOffset=CGPointMake(moveTop, moveLeft);
 35     
 36     //可视窗口大小
 37    //int windowW=100,windowH=400,windowX=10,windowY=20;
 38    // _scrollViw.frame=CGRectMake(windowX, windowY, windowW, windowH);
 39     
 40     //外边距
 41     int paddingT=10,paddingL=10,paddingR=20,paddingB=20;
 42     
 43     _scrollViw.contentInset=UIEdgeInsetsMake(paddingT, paddingL, paddingB, paddingR);
 44     
 45     //水平滚动条
 46 //    _scrollViw.showsHorizontalScrollIndicator=NO;
 47 //
 48 //    //垂直滚动条
 49 //    _scrollViw.showsVerticalScrollIndicator=NO;
 50     
 51     _scrollViw.delegate=self;
 52     
 53     _scrollViw.maximumZoomScale=2;
 54     
 55     _scrollViw.minimumZoomScale=0.1;
 56     
 57 }
 58 
 59 
 60 - (void)didReceiveMemoryWarning
 61 {
 62     [super didReceiveMemoryWarning];
 63     // Dispose of any resources that can be recreated.
 64 }
 65 -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
 66     //开始拖拽
 67     //NSLog(@"scrollViewWillBeginDragging %@",NSStringFromCGPoint(scrollView.contentOffset));
 68     
 69 }
 70 -(void)scrollViewDidScroll:(UIScrollView *)scrollView   {
 71     //正在拖拽
 72     //NSLog(@"scrollViewDidScroll %@",NSStringFromCGPoint(scrollView.contentOffset));
 73 }
 74 
 75 
 76 -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
 77     //拖拽结束
 78     //NSLog(@"scrollViewDidEndDragging %@",NSStringFromCGPoint(scrollView.contentOffset));
 79 }
 80 
 81 -(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
 82     //拖动后开始滑行
 83     //NSLog(@"scrollViewWillBeginDecelerating %@",NSStringFromCGPoint(scrollView.contentOffset));
 84 }
 85 -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
 86 
 87     //拖动后滑行结束
 88     //NSLog(@"scrollViewDidEndDecelerating %@",NSStringFromCGPoint(scrollView.contentOffset));
 89 
 90 }
 91 -(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
 92     //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
 93     //NSLog(@"scrollViewDidScrollToTop %@",NSStringFromCGPoint(scrollView.contentOffset));
 94     
 95 }
 96 
 97 
 98 -(BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
 99     //滑动到下方内容 点击系统顶部导航
100     NSLog(@"scrollViewShouldScrollToTop %@",NSStringFromCGPoint(scrollView.contentOffset));
101     //返回是否 自动定位到顶部
102     return NO;
103 }
104 
105 -(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
106     // 当触发[_scrollViw setContentOffset:CGPointMake(200, 200) animated:YES];后  触发此事件
107     //如果animated:NO的话  不会触发此事件
108     //NSLog(@"scrollViewDidEndScrollingAnimation %@",NSStringFromCGPoint(scrollView.contentOffset));
109 }
110 
111 -(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
112     //设置需要缩放的UIView
113    // NSLog(@"viewForZoomingInScrollView %@",NSStringFromCGPoint(scrollView.contentOffset));
114     
115 
116     return _img;
117 
118 }
119 
120 -(void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view{
121     //开始缩放
122     NSLog(@"scrollViewWillBeginZooming");
123     
124 }
125 
126 -(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale
127 {
128     //结束缩放
129     NSLog(@"scrollViewDidEndZooming");
130 
131     
132 }
133 
134 
135 
136 
137 
138 - (IBAction)changeOffset:(id)sender {
139     NSLog(@"change offset");
140     [_scrollViw setContentOffset:CGPointMake(200, 200) animated:NO];
141     //_scrollViw .contentOffset=CGPointMake(200, 200);
142 }
143 @end