iOS使用 CABasicAnimation 实现简单的跑马灯 无cpu暴涨

网上找了几个，但都有cup暴涨的情况发生，于是利用CABasicAnimation 简单的实现一个跑马灯,实现简单，可自己定制

584B9FDB-9641-4488-9357-CF384992231A.png

#import 

@interface LoopView : UIView
@property(nonatomic,strong)NSString *Iformation;
@property(nonatomic,strong)NSString *Image;
@end

#import "LoopView.h"
#import "UIImageView+WebCache.h"
@interface LoopView(){
    UILabel *AD;
    UIImageView *headImage;
    CABasicAnimation *animation;
     CABasicAnimation *animationhead;
}
@end
@implementation LoopView
-(instancetype)initWithFrame:(CGRect)frame{

    self = [super initWithFrame:frame];
    if (self) {
        AD = [[UILabel alloc]initWithFrame:CGRectMake(28*WPSCREEN_WIDTH_RATIO, 0, self.frame.size.width, self.frame.size.height)];
        [self addSubview:AD];
        
        AD.textColor = TJXColor(146, 152, 169);
        AD.font = [UIFont fontWithName:@"Gotham-Book" size:12*WPSCREEN_WIDTH_RATIO];
        AD.textAlignment = NSTextAlignmentLeft;
        headImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 20*WPSCREEN_WIDTH_RATIO, 20*WPSCREEN_WIDTH_RATIO)];
      
        [self addSubview:headImage];
        
        headImage.layer.cornerRadius = 10;
        headImage.layer.masksToBounds = YES;

        [self sssss];
        [self headimage];
    }
    return self;
}
-(void)setIformation:(NSString *)Iformation{
       AD.text =Iformation;
}
-(void)setImage:(NSString *)Image{

      [headImage sd_setImageWithURL:[NSURL URLWithString:Image]];
}
-(void)sssss{

    
    animation = [CABasicAnimation animationWithKeyPath:@"position"];
    // 动画选项的设定
    animation.duration = 2; // 持续时间
    animation.repeatCount = MAXFLOAT; // 重复次数
    animation.removedOnCompletion = NO;
    animation.autoreverses = NO;
    // 起始帧和终了帧的设定
    animation.fromValue = [NSValue valueWithCGPoint:CGPointMake(AD.layer.position.x, 30*WPSCREEN_HIGTH_RATIO)]; // 起始帧
    animation.toValue = [NSValue valueWithCGPoint:CGPointMake(AD.layer.position.x, AD.layer.position.y-20*WPSCREEN_HIGTH_RATIO)]; // 终了帧
    // 添加动画
    [AD.layer addAnimation:animation forKey:@"AnimationMoveY"];
//    [headImage.layer addAnimation:animation forKey:@"AnimationMoveY"];

}
-(void)headimage{
    animationhead = [CABasicAnimation animationWithKeyPath:@"position"];
    // 动画选项的设定
    animationhead.duration = 2; // 持续时间
    animationhead.repeatCount = MAXFLOAT; // 重复次数
    animationhead.removedOnCompletion = NO;
    animationhead.autoreverses = NO;
    // 起始帧和终了帧的设定
    animationhead.fromValue = [NSValue valueWithCGPoint:CGPointMake(headImage.layer.position.x, 30*WPSCREEN_HIGTH_RATIO)]; // 起始帧
    animationhead.toValue = [NSValue valueWithCGPoint:CGPointMake(headImage.layer.position.x, headImage.layer.position.y-20*WPSCREEN_HIGTH_RATIO)]; // 终了帧
    // 添加动画
    [headImage.layer addAnimation:animationhead forKey:@"AnimationMoveY"];
    
}