iOS之跑马灯的实现-白红宇

iOS之跑马灯的实现

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发布时间：2019-05-27

本文共 5397 字，大约阅读时间需要 17 分钟。

#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;