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UIScrollView常见属性

news 来源：原创 2024/5/18 20:34:13

 1 //  ViewController.m
 2 //  03查看大图
 3 //
 4 //  Created by Administrator on 15/10/10.
 5 //  Copyright  2015年 ccsu. All rights reserved.
 6 //
 7 
 8 #import "ViewController.h"
 9 
10 @interface ViewController ()
11 @property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
12 @property(nonatomic,strong)UIImageView *imageView;
13 @property(nonatomic,strong)UIImage *image;
14 
15 @end
16 
17 @implementation ViewController
18 
19 -(void)setImage:(UIImage *)image{
20     _image = image;
21     //设置图像内容
22     self.imageView.image = image;//把图像传给UIImageView
23     //让图像视图根据图像自动调整大小
24     [self.imageView sizeToFit];
25     //告诉ScrollView内部内容大小
26     self.scrollView.contentSize = image.size;
27     
28 
29 
30 }
31 -(UIImageView *)imageView{
32     if (_imageView == nil) {
33         _imageView = [[UIImageView alloc]init];
34         [self.scrollView addSubview:_imageView];
35     }
36     return _imageView;
37 
38 }
39 - (void)viewDidLoad {
40     [super viewDidLoad];
41 
42     self.image = [UIImage imageNamed:@"minion"];
43     //设置边距
44     self.scrollView.contentInset = UIEdgeInsetsMake(20, 20, 20, 20);
45     //不显示水平滚动标识(滚动条)
46     self.scrollView.showsHorizontalScrollIndicator = NO;
47     //不显示垂直滚动标识
48     self.scrollView.showsVerticalScrollIndicator = NO;
49     //偏移位置
50     self.scrollView.contentOffset = CGPointMake(100, 100);
51     //弹簧效果,取消就是NO
52     self.scrollView.bounces = YES;
53     UIButton *btn = [UIButton buttonWithType:UIButtonTypeContactAdd];
54     btn.center = self.view.center;
55     [self.view addSubview:btn];
56     
57     [btn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
58     
59 }
60 
61 -(void)click
62 {
63 
64     //移动大图的偏移位置.结构体只能不能直接赋值；
65     CGPoint offset = self.scrollView.contentOffset;
66     offset.x += 20;
67     offset.y += 20;
68     //注意：设置contentoffset 会忽略contentSize（即scrollview得总大小）
69     self.scrollView.contentOffset = offset;
70 
71 
72 }
73 
74 @end