本文实例为大家分享了iOS实现循环滚动公告栏的具体代码，供大家参考，具体内容如下
封装了一个继承于UIView的类，如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
|
#import <UIKit/UIKit.h> NS_ASSUME_NONNULL_BEGIN@interface XtayNoticeScrollView : UIView - (instancetype)initWithFrame:(CGRect)frame titleArray:(NSArray<NSString *> *)titleArray; - (void)openTimer; - (void)closeTimer; @end NS_ASSUME_NONNULL_END |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
#define ROW_H self.bounds.size.height #import "XtayNoticeScrollView.h" @interface XtayNoticeScrollView () /// scrollView@property (nonatomic, strong) UIScrollView *bgScrollView;/// titleArr@property (nonatomic, copy) NSArray *titleArr;/// timer@property (nonatomic, strong) NSTimer *scrollTimer; @end @implementation XtayNoticeScrollView - (instancetype)initWithFrame:(CGRect)frame titleArray:(NSArray<NSString *> *)titleArray { self = [super initWithFrame:frame]; if (self) { self.titleArr = titleArray; [self addSubview:self.bgScrollView]; [self createBaseView]; [self openTimer]; } return self;} // MARK: - 开启定时器- (void)openTimer { if (!_scrollTimer) { _scrollTimer = [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(timerMoved) userInfo:nil repeats:YES]; [[NSRunLoop currentRunLoop] addTimer:_scrollTimer forMode:NSRunLoopCommonModes]; }} // MARK: - 关闭定时器- (void)closeTimer { [_scrollTimer invalidate]; _scrollTimer = nil;} - (UIScrollView *)bgScrollView { if (!_bgScrollView) { _bgScrollView = [[UIScrollView alloc] initWithFrame:self.bounds]; _bgScrollView.scrollEnabled = NO; _bgScrollView.showsVerticalScrollIndicator = NO; _bgScrollView.showsHorizontalScrollIndicator = NO; _bgScrollView.backgroundColor = UIColor.whiteColor; } return _bgScrollView;} // MARK: - 创建所有视图- (void)createBaseView { // 安全判断 if (self.titleArr.count == 0) { return; } // 为了展示滑动过程的流畅性，重新处理数组 NSMutableArray *dataMArray = [NSMutableArray arrayWithCapacity:0]; [dataMArray addObjectsFromArray:_titleArr]; [dataMArray addObject:_titleArr.firstObject]; for (int i = 0; i<dataMArray.count; i++) { UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, ROW_H*(i%dataMArray.count), self.bgScrollView.bounds.size.width, ROW_H)]; label.text = dataMArray[i]; label.font = [UIFont systemFontOfSize:15]; label.textColor = [UIColor blackColor]; label.numberOfLines = 0; [_bgScrollView addSubview:label]; } _bgScrollView.contentSize = CGSizeMake(0, ROW_H*dataMArray.count);} // MARK: - 定时器调用方法- (void)timerMoved { CGFloat pageY = self.bgScrollView.contentOffset.y/ROW_H; int pageIntY = pageY; if (pageIntY >= self.titleArr.count) { [self.bgScrollView setContentOffset:CGPointMake(0, 0) animated:NO]; } else { [self.bgScrollView setContentOffset:CGPointMake(0, (pageIntY+1)*ROW_H) animated:YES]; }} |
VC调用代码：
|
1
2
3
|
XtayNoticeScrollView *notiView = [[XtayNoticeScrollView alloc] initWithFrame:CGRectMake(50, 100, self.view.frame.size.width-100, 50) titleArray:@[@"我是第一个数据-11111111111111", @"我是第二个数据-2222222", @"我是第三个数据-33333333"]]; [self.view addSubview:notiView]; |
运行后的效果视频：
公告内容用的label，无点击效果，若需要。替换为button，添加手势，都可以。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/Q_Q33757152/article/details/114986310
