上下滚动的公告图

创建一个基于UIView的类

.h文件中

.h文件中#import <UIKit/UIKit.h>@class GYChangeTextView;@protocol GYChangeTextViewDelegate <NSObject>

//点击公告方法- (void)gyChangeTextView:(GYChangeTextView *)textView didTapedAtIndex:(NSInteger)index;@end@interface GYChangeTextView : UIView@property (nonatomic, assign) id<GYChangeTextViewDelegate> delegate;- (void)animationWithTexts:(NSArray *)textAry;- (void)stopAnimation;@end

.m文件中

#import "GYChangeTextView.h"#define DEALY_WHEN_TITLE_IN_MIDDLE  3.0#define DEALY_WHEN_TITLE_IN_BOTTOM  0.0typedef NS_ENUM(NSUInteger, GYTitlePosition) {    GYTitlePositionTop    = 1,    GYTitlePositionMiddle = 2,    GYTitlePositionBottom = 3};@interface GYChangeTextView ()@property (nonatomic, strong) UILabel *textLabel;@property (nonatomic, strong) NSArray *contentsAry;@property (nonatomic, assign) CGPoint topPosition;@property (nonatomic, assign) CGPoint middlePosition;@property (nonatomic, assign) CGPoint bottomPosition;/* *1.控制延迟时间，当文字在中间时，延时时间长一些，如5秒，这样可以让用户浏览清楚内容； *2.当文字隐藏在底部的时候，不需要延迟，这样衔接才流畅； *3.通过上面的宏定义去更改需要的值 */@property (nonatomic, assign) CGFloat needDealy;@property (nonatomic, assign) NSInteger currentIndex;  /*当前播放到那个标题了*/@property (nonatomic, assign) BOOL shouldStop;         /*是否停止*/@end@implementation GYChangeTextView//重新系统方法- (instancetype)initWithFrame:(CGRect)frame {    self = [super initWithFrame:frame];    if (self) {        self.topPosition    = CGPointMake(self.frame.size.width/2, self.frame.size.height/2-23);        self.middlePosition = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);        self.bottomPosition = CGPointMake(self.frame.size.width/2, self.frame.size.height/2+23);        self.shouldStop = NO;                UIImageView *advertiView = [[UIImageView alloc]initWithFrame:CGRectMake(10, 5, 20, 20)];        advertiView.image = [UIImage imageNamed:@"advertis"];        [self addSubview:advertiView];                _textLabel = [[UILabel alloc] init];        _textLabel.layer.bounds = CGRectMake(0, 0, CGRectGetWidth(frame)-100, CGRectGetHeight(frame));        _textLabel.layer.position = self.middlePosition;        _textLabel.textAlignment = NSTextAlignmentLeft;        [self addSubview:_textLabel];        self.clipsToBounds = YES;   /*保证文字不跑出视图*/        self.needDealy = DEALY_WHEN_TITLE_IN_MIDDLE;    /*控制第一次显示时间*/        self.currentIndex = 0;    }    return self;}//给动画添加内容- (void)animationWithTexts:(NSArray *)textAry {    self.contentsAry = textAry;    self.textLabel.text = [textAry objectAtIndex:0];    [self startAnimation];}//开始动画- (void)startAnimation {    __weak typeof(self) weakSelf = self;    [UIView animateWithDuration:0.3 delay:self.needDealy options:UIViewAnimationOptionCurveEaseInOut animations:^{        if ([weakSelf currentTitlePosition] == GYTitlePositionMiddle) {            weakSelf.textLabel.layer.position = weakSelf.topPosition;        } else if ([weakSelf currentTitlePosition] == GYTitlePositionBottom) {            weakSelf.textLabel.layer.position = weakSelf.middlePosition;        }    } completion:^(BOOL finished) {        if ([weakSelf currentTitlePosition] == GYTitlePositionTop) {            weakSelf.textLabel.layer.position = weakSelf.bottomPosition;            weakSelf.needDealy = DEALY_WHEN_TITLE_IN_BOTTOM;            weakSelf.currentIndex ++;            weakSelf.textLabel.text = [weakSelf.contentsAry objectAtIndex:[weakSelf realCurrentIndex]];        } else {            weakSelf.needDealy = DEALY_WHEN_TITLE_IN_MIDDLE;        }        if (!weakSelf.shouldStop) {            [weakSelf startAnimation];        } else { //停止动画后，要设置label位置和label显示内容            weakSelf.textLabel.layer.position = weakSelf.middlePosition;            weakSelf.textLabel.text = [weakSelf.contentsAry objectAtIndex:[weakSelf realCurrentIndex]];        }    }];}//停止动画- (void)stopAnimation {    self.shouldStop = YES;}- (NSInteger)realCurrentIndex {    return self.currentIndex % [self.contentsAry count];}- (GYTitlePosition)currentTitlePosition {    if (self.textLabel.layer.position.y == self.topPosition.y) {        return GYTitlePositionTop;    } else if (self.textLabel.layer.position.y == self.middlePosition.y) {        return GYTitlePositionMiddle;    }    return GYTitlePositionBottom;}- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {    if ([self.delegate respondsToSelector:@selector(gyChangeTextView:didTapedAtIndex:)]) {        [self.delegate gyChangeTextView:self didTapedAtIndex:[self realCurrentIndex]];    }}@end

在控制器里调用

GYChangeTextView *tView = [[GYChangeTextView alloc] initWithFrame:CGRectMake(0, JYZScreenH*0.3, JYZScreenW, 30)];    tView.backgroundColor = [UIColor colorWithHexString:@"eeeeee"];    tView.delegate = self;    [view addSubview:tView];    self.tView = tView;[self.tView animationWithTexts:self.advertisArr];#pragma mark 公告视图代理- (void)gyChangeTextView:(GYChangeTextView *)textView didTapedAtIndex:(NSInteger)index{}