iOS使用 CABasicAnimation 實現簡單的跑馬燈 無cpu暴漲

網上找了幾個，但都有cup暴漲的情況發生，于是利用CABasicAnimation 簡單的實現一個跑馬燈,實現簡單，可自己定制

#import <UIKit/UIKit.h>

@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"];
    // 動畫選項的設定
    animation.duration = 2; // 持續時間
    animation.repeatCount = MAXFLOAT; // 重復次數
    animation.removedOnCompletion = NO;
    animation.autoreverses = NO;
    // 起始幀和終了幀的設定
    animation.fromValue = [NSValue valueWithCGPoint:CGPointMake(AD.layer.position.x, 30*WPSCREEN_HIGTH_RATIO)]; // 起始幀
    animation.toValue = [NSValue valueWithCGPoint:CGPointMake(AD.layer.position.x, AD.layer.position.y-20*WPSCREEN_HIGTH_RATIO)]; // 終了幀
    // 添加動畫
    [AD.layer addAnimation:animation forKey:@"AnimationMoveY"];
//    [headImage.layer addAnimation:animation forKey:@"AnimationMoveY"];

}
-(void)headimage{
    animationhead = [CABasicAnimation animationWithKeyPath:@"position"];
    // 動畫選項的設定
    animationhead.duration = 2; // 持續時間
    animationhead.repeatCount = MAXFLOAT; // 重復次數
    animationhead.removedOnCompletion = NO;
    animationhead.autoreverses = NO;
    // 起始幀和終了幀的設定
    animationhead.fromValue = [NSValue valueWithCGPoint:CGPointMake(headImage.layer.position.x, 30*WPSCREEN_HIGTH_RATIO)]; // 起始幀
    animationhead.toValue = [NSValue valueWithCGPoint:CGPointMake(headImage.layer.position.x, headImage.layer.position.y-20*WPSCREEN_HIGTH_RATIO)]; // 終了幀
    // 添加動畫
    [headImage.layer addAnimation:animationhead forKey:@"AnimationMoveY"];

}

來自：http://www.jianshu.com/p/0c8a64aa5161