通常显示不够了，比如八个字。只能显示6个字 。产品要求 来回滚动 

下面有两种 方法 ： 一种UIScrollView  一种 View动画  如果不能满足你  请点击这个  好用的第三方

- (void)viewDidLoad{	[super viewDidLoad];	self.view.backgroundColor = [UIColor blackColor];	// 注册字体 REGISTER_FONT(bundleFont(@"新蒂小丸子体.ttf"), @"新蒂小丸子体"); // 获取文本 NSString *string = @" 喜欢这首情思幽幽的曲子，仿佛多么遥远，在感叹着前世的情缘，又是那么柔软，在祈愿着来世的缠绵。《莲的心事》，你似琉璃一样的晶莹，柔柔地拨动我多情的心弦。我，莲的心事，有谁知？我，莲的矜持，又有谁懂？ "; // 初始化label UILabel *label = [UILabel new]; label.text = string; label.numberOfLines = 0; label.textColor = [UIColor cyanColor]; label.font = [UIFont fontWithName:CUSTOM_FONT(@"新蒂小丸子体", 0) size:20.f]; // 计算尺寸 CGSize size = [label boundingRectWithSize:CGSizeMake(0, 0)]; label.frame = (CGRect){ CGPointZero, size}; // 初始化ScrollView UIScrollView *showView = \ [[UIScrollView alloc] initWithFrame:CGRectMake(0, 90, 320, size.height)]; showView.contentSize = size; showView.showsHorizontalScrollIndicator = NO; [showView addSubview:label]; [self.view addSubview:showView]; // 形成边缘的遮罩 UIImageView *imageView = \ [[UIImageView alloc] initWithFrame:CGRectMake(0, 90, 320, size.height)]; imageView.image = [UIImage imageNamed:@"bg"]; [self.view addSubview:imageView]; // 动画 [UIView animateKeyframesWithDuration:10 delay:7 options:UIViewKeyframeAnimationOptionAllowUserInteraction animations:^{ // 计算移动的距离 CGPoint point = showView.contentOffset; point.x = size.width - 320.f; showView.contentOffset = point; } completion:^(BOOL finished) { }]; } 第二种 简洁版

#import "Ridehorselight.h"@interface Ridehorselight () @property (nonatomic, strong) NSTimer *timer; //定时器 @property (nonatomic, weak) UIView *viewAnima; //Label的背景 @property (nonatomic, weak) UILabel *customLabel; //Label @end @implementation Ridehorselight - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. [self addClildView]; [self setTimer]; } - (void)addClildView { self.view.backgroundColor = [UIColor whiteColor]; CGFloat viewX = (self.view.frame.size.width-200)/2; UIView *viewAnima = [[UIView alloc] initWithFrame:CGRectMake(viewX, 100, 200, 40)]; viewAnima.backgroundColor = [UIColor yellowColor]; self.viewAnima = viewAnima; self.viewAnima.clipsToBounds = YES; //剪掉超出view范围部分 CGFloat customLabelY = (self.viewAnima.frame.size.height-30)/2; UILabel *customLabel = [[UILabel alloc]initWithFrame:CGRectMake(self.viewAnima.frame.size.width, customLabelY, 200, 30)]; customLabel.text = @"跑马灯效果，滚动文本！"; customLabel.textColor = [UIColor redColor]; self.customLabel = customLabel; [self.view addSubview:viewAnima]; [viewAnima addSubview:customLabel]; } - (void)setTimer { self.timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(changePos) userInfo:nil repeats:YES]; } - (void)changePos { CGPoint cenPos = self.customLabel.center; if (cenPos.x < -100) { CGFloat distance = self.customLabel.frame.size.width/2; self.customLabel.center = CGPointMake(self.viewAnima.frame.size.width+distance, 20); } else { self.customLabel.center = CGPointMake(cenPos.x-5, 20); } }