iOS之跑马灯的实现
#import "LYAnimatePaomadengVC.h"
@interface LYAnimatePaomadengVC ()
@end
@implementation LYAnimatePaomadengVC
- (void)viewDidLoad {
[superviewDidLoad];
}
//UIView动画实现跑马灯
-(void)UIVIEwAnomatePaomadeng{
UILabel *label3 = [[UILabelalloc] initWithFrame:CGRectMake(10,200,self.view.bounds.size.width*4,100)];
label3.backgroundColor = [UIColorredColor];
label3.text =@"噜啦啦噜啦啦噜啦噜啦噜，噜啦噜啦噜啦噜啦噜啦噜~~~lllllllllllllllllllllllllllllllllllllllllll噜啦啦噜啦啦噜啦噜啦噜，噜啦噜啦噜啦噜啦噜啦噜~~~lllllllllllllllllllllllllllllllllllllllllll";
[self.viewaddSubview:label3];
CGRect frame = label3.frame;
frame.origin.x =1000;
label3.frame = frame;
[UIViewbeginAnimations:@"testAnimation"context:NULL];
[UIViewsetAnimationDuration:10.0f];
[UIViewsetAnimationCurve:UIViewAnimationCurveLinear];
[UIViewsetAnimationDelegate:self];
[UIViewsetAnimationRepeatAutoreverses:NO];
[UIViewsetAnimationRepeatCount:115];
frame = label3.frame;
frame.origin.x =-350;
label3.frame = frame;
[UIViewcommitAnimations];
}
//UIVIew实现跑马灯方式二
-(void)paomadeng{
UILabel *aUILabel=[[UILabelalloc]initWithFrame:CGRectMake(0,60, 500, 50)];
aUILabel.text=@"asafdsfdafdsafdsafdafdsafdsfdsafdsafdafsfafdfdsafdafdsfdafdsadsa";
aUILabel.textColor=[UIColorredColor];
[self.viewaddSubview:aUILabel];
//取消所有的动画
//[self.aUILabel.layer removeAllAnimations];
//计算实际text大小
CGSize textSize = [aUILabel.text sizeWithAttributes:@{NSFontAttributeName: [UIFontsystemFontOfSize:15]}];
//保存label的frame
CGRect lframe =aUILabel.frame;
//用计算出来的text的width更改frame的原始width
lframe.size.width= textSize.width;//从屏幕最右边向左边移
lframe.origin.x=self.view.bounds.size.width; //用新值更改label的原frame值
aUILabel.frame= lframe;
//计算动画x移动的最大偏移：屏幕width+text的width
float offset = textSize.width+self.view.bounds.size.width;
[UIViewanimateWithDuration:10.0delay:0options:UIViewAnimationOptionRepeat//动画重复的主开关
|UIViewAnimationOptionCurveLinear//动画的时间曲
animations:^{aUILabel.transform=CGAffineTransformMakeTranslation(-offset,0);} completion:^(BOOL finished) {
}
];
}
@end
==============scrollView实现跑马灯
#import "LYScrollPaomadengVC.h"
#define WIDTH [UIScreen mainScreen].bounds.size.width
#define HEIGHT [UIScreen mainScreen].bounds.size.height
#define ADHEIGHT 30
@interface LYScrollPaomadengVC ()<UIScrollViewDelegate>
@property(nonatomic,strong)UIView *infoscrollview;//盛放轮播infolabel的View
@property(nonatomic,strong)UILabel *scrollLabel;//轮播消息
@property(nonatomic,strong)NSTimer *timer;//定时器
@property(nonatomic,strong)UIScrollView *infoScroll;//消息轮播
@property(nonatomic,assign)CGFloat scrolllabelWidth;//滚动消息的宽度
@property(nonatomic,assign)CGFloat infoscrollAheadlength;//前进的距离
@end
@implementation LYScrollPaomadengVC
- (void)viewDidLoad {
[superviewDidLoad];
//轮播小广播
UIView *infoscrollview=[[UIViewalloc]initWithFrame:CGRectMake(0,ADHEIGHT, WIDTH,40+2)];
[self.viewaddSubview:infoscrollview];
self.infoscrollview=infoscrollview;
infoscrollview.backgroundColor=[UIColorwhiteColor];
UIImageView *imageV=[[UIImageViewalloc]initWithFrame:CGRectMake(15,10, 20, 20)];
imageV.image=[UIImageimageNamed:@"homeScrollInfo"];
[infoscrollview addSubview:imageV];
if(!self.infoScroll){
self.infoScroll=[[UIScrollViewalloc]initWithFrame:CGRectMake(50,0,WIDTH-50,40)];
}
self.infoScroll.scrollEnabled=NO;
self.infoScroll.delegate=self;
self.infoScroll.showsHorizontalScrollIndicator=NO;
[self.infoscrollviewaddSubview:self.infoScroll];
// for (UIView *v in self.infoScroll.subviews) {
// [v removeFromSuperview];
// }
self.scrollLabel=[[UILabelalloc]init];
self.scrollLabel.text=@"2号钱包，取现0.35%费率，秒到";
self.scrollLabel.textColor=[UIColorgrayColor];
self.scrollLabel.font=[UIFontsystemFontOfSize:15];
// 给 显示的文本一个区域
CGSize contentMaxSizes = CGSizeMake(MAXFLOAT,40);
// NSFontAttributeName 字体的大小
NSDictionary *attributesDicts = @{NSFontAttributeName:[UIFontsystemFontOfSize:15]};
//计算文本实际宽高的时候， 计算的字体大小要和label中设置的字体大小保持一致
// 根据限定的条件， 来计算text 真实的宽高
CGSize contentRealSizes = [self.scrollLabel.textboundingRectWithSize:contentMaxSizes options:NSStringDrawingUsesLineFragmentOriginattributes:attributesDicts context:nil].size;
self.scrolllabelWidth=contentRealSizes.width;//滚动消息的实际宽度
self.scrollLabel.frame=CGRectMake(0,0, contentRealSizes.width,40);/////
self.infoScroll.contentSize=CGSizeMake(contentRealSizes.width+1,0);
[self.infoScrolladdSubview:self.scrollLabel];
}
//在将要push出去的时候把导航栏清空，显示下面的横线
-(void)viewWillDisappear:(BOOL)animated{
[superviewWillDisappear:animated];
// // 让计时器无效
if ([self.timerisValid]) {
[self.timerinvalidate];
self.timer =nil;
}
//关闭定时器
// [self.timer setFireDate:[NSDate distantFuture]];
}
-(void)viewDidAppear:(BOOL)animated{
[selfsettimer];//infolunbo
}
-(void)infolunbo{
NSLog(@"定时器执行");
if(self.infoscrollAheadlength<=self.scrolllabelWidth-2){
self.infoscrollAheadlength+=2;
[self.infoScrollsetContentOffset:CGPointMake(self.infoscrollAheadlength,0)];
}else{//回到起点
self.infoscrollAheadlength=0.0;
[self.infoScrollsetContentOffset:CGPointMake(0,0)];
}
}
//定时器调用
-(void)settimer{
NSLog(@"定时器创建");
NSTimer *timer = [NSTimertimerWithTimeInterval:0.1target:selfselector:@selector(infolunbo)userInfo:nilrepeats:YES];
[[NSRunLoopmainRunLoop] addTimer:timerforMode:NSDefaultRunLoopMode];
self.timer=timer;
}
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
[self.timerinvalidate];//定时器失效
self.timer=nil;
self.infoscrollAheadlength=0;
[self.infoScrollsetContentOffset:CGPointMake(0,0)];
}
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
[selfsettimer];//开启定时器
}
@end
框架：https://github.com/jinht/Marquee
swift：https://github.com/pujiaxin33/JXMarqueeView