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 https://github.com/cbpowell/MarqueeLabel 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);
}
}