[iOS基础控件 - 5.3] 电台APP可滚动主界面(UIScrollView制作)

 1     // 取得最底端的Y值
 2     CGFloat maxY = CGRectGetMaxY(self.lastImage.frame);
 3    
 4     // 设置水平方向不可滚，垂直方向可滚动到最底端
 5     self.scrollView.contentSize = CGSizeMake(0, maxY);
 6    
 7     // 设置顶部、底部间隔
 8     self.scrollView.contentInset = UIEdgeInsetsMake(55, 0, 70, 0);
 9    
10     // 设置初始滚动位置
11     self.scrollView.contentOffset = CGPointMake(0, -55);

 1 //
 2 //  ViewController.m
 3 //  Radio
 4 //
 5 //  Created by hellovoidworld on 14/11/28.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 #import "ViewController.h"
10 
11 @interface ViewController ()
12 @property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
13 @property (weak, nonatomic) IBOutlet UIButton *lastImage;
14 
15 @end
16 
17 @implementation ViewController
18 
19 - (void)viewDidLoad {
20     [super viewDidLoad];
21     // Do any additional setup after loading the view, typically from a nib.
22    
23     [self initScrollView];
24 }
25 
26 - (void)didReceiveMemoryWarning {
27     [super didReceiveMemoryWarning];
28     // Dispose of any resources that can be recreated.
29 }
30 
31 - (void) initScrollView {
32     // 取得最底端的Y值
33     CGFloat maxY = CGRectGetMaxY(self.lastImage.frame);
34    
35     // 设置水平方向不可滚，垂直方向可滚动到最底端
36     self.scrollView.contentSize = CGSizeMake(0, maxY);
37    
38     // 设置顶部、底部间隔
39     self.scrollView.contentInset = UIEdgeInsetsMake(55, 0, 70, 0);
40    
41     // 设置初始滚动位置
42     self.scrollView.contentOffset = CGPointMake(0, -55);
43 }
44 
45 @end