加载动画

#import <UIKit/UIKit.h>

@interface LoadAnimAtion : UIView

-(instancetype)initWithFrame:(CGRect)frame;

-(void)loadAnimAtion;

@end

/

#import "LoadAnimAtion.h"

@implementation LoadAnimAtion


-(instancetype)initWithFrame:(CGRect)frame
{

  if (self = [super initWithFrame:frame]) {
    
      self.backgroundColor = [UIColor whiteColor];
    
      [self loadAnimAtion];

  }

  return self;
}


-(void)loadAnimAtion
{
  CAReplicatorLayer * replicatorLayer = [CAReplicatorLayer layer];
  replicatorLayer.frame           = CGRectMake(Screen_width/2-75, Screen_height/2-75-64, 150, 150);
  replicatorLayer.cornerRadius    = 10.0;

    [self.layer addSublayer:replicatorLayer];

   CALayer  * dotLayer       = [CALayer layer];
   dotLayer.bounds          = CGRectMake(0, 0, 20, 20);
   dotLayer.position        = CGPointMake(50, 20);
   dotLayer.backgroundColor = purColor.CGColor;
   dotLayer.cornerRadius    = 10;
   dotLayer.masksToBounds   = YES;

    [replicatorLayer addSublayer: dotLayer];

    CGFloat count                     = 10.0;
    replicatorLayer.instanceCount     = count;
    CGFloat angel                     = 2* M_PI/count;
    replicatorLayer.instanceTransform =                     CATransform3DMakeRotation(angel, 0, 0, 1);

    CABasicAnimation * animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    animation.duration    = 1.0;
    animation.fromValue   = @1;
    animation.toValue     = @0.1;
    animation.repeatCount = MAXFLOAT;
    [dotLayer addAnimation:animation forKey:nil];

    replicatorLayer.instanceDelay = 1.0/ count;

    dotLayer.transform = CATransform3DMakeScale(0.01, 0.01, 0.01);
 }

@end