#import <UIKit/UIKit.h>

@interface ProgressView : UIView

@property(nonatomic,assign)CGFloat progress;

@property(nonatomic,strong)UIColor *layColor;

@end

#import "ProgressView.h"

@interface ProgressView ()

{

    CALayer *progressLayer;

    CGFloat currentViewWidth;//当前view的宽度

}

@end

@implementation ProgressView

@synthesize progress=_progress;

@synthesize layColor=_layColor;

- (instancetype)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        progressLayer=[CALayer layer];

        progressLayer.frame=CGRectMake(, , , frame.size.height);

        progressLayer.backgroundColor=[UIColor redColor].CGColor;

        [self.layer addSublayer:progressLayer];

        currentViewWidth=frame.size.width;

    }

    return self;

}

-(void)setProgress:(CGFloat)progress

{

    _progress=progress;

    if (progress<=) {

        progressLayer.frame=CGRectMake(, , , self.frame.size.height);

    }

    else if (progress<=)

    {

        progressLayer.frame=CGRectMake(, , progress*currentViewWidth, self.frame.size.height);

    }

    else

    {

      progressLayer.frame=CGRectMake(, , currentViewWidth, self.frame.size.height);

    }

}

-(CGFloat)progress

{

    return _progress;

}

-(void)setLayColor:(UIColor *)layColor

{

    _layColor=layColor;

    self.layer.backgroundColor=layColor.CGColor;

}

-(UIColor *)layColor

{

    return _layColor;

}

@end

#import "ViewController.h"

#import "ProgressView.h"

@interface ViewController ()

@property(nonatomic,strong)ProgressView *progressView;

@property(nonatomic,strong)NSTimer *timer;

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.progressView=[[ProgressView alloc]initWithFrame:CGRectMake(, , , )];

    [self.view addSubview:self.progressView];

    _timer=[NSTimer scheduledTimerWithTimeInterval: target:self selector:@selector(layerAnimation) userInfo:nil repeats:YES];

}

-(void)layerAnimation

{

    self.progressView.progress=arc4random()%/100.0f;

    self.progressView.layColor=[UIColor greenColor];

}

@end