基于iOS实现音乐震动条效果

//创建复制层
-(void)createRepl{
 //复制层
 CAReplicatorLayer * repL = [CAReplicatorLayer layer];
 repL.frame = self.contentV.bounds;
 //复制6份
 repL.instanceCount = 6;
 //形变，每一个形变都是相对于上一个复制出来的子层开始的
 repL.instanceTransform = CATransform3DMakeTranslation(45, 0, 0);
 //动画延时执行
 repL.instanceDelay = 0.5;
 ///要设置复制层的颜色 原始层的颜色要设为白色.
 repL.instanceColor = [UIColor redColor].CGColor;
 [self.contentV.layer addSublayer:repL];

 self.repL = repL;
}

//
// ViewController.m
// 03_UIView75_音乐震动条
//
// Created by 杞文明 on 17/7/21.
// Copyright © 2017年 杞文明. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *contentV;
@property (weak,nonatomic) CAReplicatorLayer * repL;
@property (weak,nonatomic) CALayer * layer;
@end

@implementation ViewController

- (void)viewDidLoad {
 [super viewDidLoad];

 //1.创建复制层次
 [self createRepl];

 //2.添加音量震动条
 [self addVoiceBar];

 //3.添加动画
 [self addAnimation];
}


//创建复制层
-(void)createRepl{
 //复制层
 CAReplicatorLayer * repL = [CAReplicatorLayer layer];
 repL.frame = self.contentV.bounds;
 //复制6份
 repL.instanceCount = 6;
 //形变，每一个形变都是相对于上一个复制出来的子层开始的
 repL.instanceTransform = CATransform3DMakeTranslation(45, 0, 0);
 //动画延时执行
 repL.instanceDelay = 0.5;
 ///要设置复制层的颜色 原始层的颜色要设为白色.
 repL.instanceColor = [UIColor redColor].CGColor;
 [self.contentV.layer addSublayer:repL];

 self.repL = repL;
}

//添加音量震动条
-(void)addVoiceBar{
 CALayer * layer = [CALayer layer];
 layer.frame = CGRectMake(0, self.contentV.bounds.size.height-150, 30, 150);
 layer.backgroundColor = [UIColor whiteColor].CGColor;

 layer.position = CGPointMake(0, self.contentV.bounds.size.height);
 layer.anchorPoint = CGPointMake(0, 1);

 [self.repL addSublayer:layer];
 self.layer = layer;
}

//添加动画
-(void)addAnimation{
 //添加动画 对y方向缩放
 CABasicAnimation * anim = [CABasicAnimation animation];
 //设置属性
 anim.keyPath = @"transform.scale.y";
 anim.toValue = @0;
 anim.repeatCount = MAXFLOAT;
 anim.autoreverses = YES;
 anim.duration = 0.5;
 [self.layer addAnimation:anim forKey:nil];
}

@end